I've seen a lot of discussion on whether a positive pressure evaporator (like one on top of an upflow furnace) needs a trap or not. While it doesn't cause the drain issue like a negative pressure, it does eliminate air leakage. Please share your opinion on this. I am a HS HVAC teacher and I'd love to know your thoughts.
No matter how many times this is explained verbally, the phenomenon of negative pressure is not usually well understood to most until they see it in real time. This is a terrific demonstration!
@@thejohnbeck lol first its funny seeing such a recent comment to an older video, right in line to what I was thinking as well. But I found the answer. When the system is running and sealed, and the fan in the system is moving air, it is on the input side (in this setup). Meaning its a vacuum, or under negative pressure. The drain is like a straw, so while the fan is on, the drain is sucking in air. (I wrongly assumed in the video that "system running" was focusing more on the temperature of the evap coil since he focused on it). When the fan stops, there's no sucking, and the pressure inside that area and outside are equal so the water is free to move via gravity. The trap on the drain needs to be filled with water or it doesn't work, because the weight of the water is more heavy than the sucking vacuum of the blower motor in that small area, so air cannot come up inside, so the water can move under gravitational forces, without being pulled back into the pan. Real world example. You get a fresh frosty milkshake from wendy's and go to suck on the straw. It's too thick but you kinda try again, but as you give up, the negative pressure in the straw makes your spit backwash into the straw.
I am HVAC contractor with ~10 years of experience. I think that this video is the best explanation why do you install that p-trap on the condensate line so far. :) Thank you!
When we moved into our new house in North Florida about 8-years ago, we soon started to have filter failures from moisture. This was happening every 1-2 months, and at times the failed/wet filter media would get blown up into the underside of the coils. It was quite maddening. After considerable research, I found a similar video and installed the clear trap you've shown in your video. After that, no more issues. I'm a bit confused why something so critical can be missed by the Building Inspector, and the private Home Inspector that I contracted to check the house out before we purchased it. You've done the best job explaining why the trap is needed, that I've ever seen. Great work!
Ha ha ha. Inspectors. That's a good one. They nitpick little things that don't mean a bit of difference, but anything important they forgot to mention in inspector school. Here's 10 pages of bullcrap that needs to be fixed. Give me my check.
Again, well done! Getting this point across to installers that are trying to “just get the job done “is critical. No excuses for not having a trap installed.
Thank you !!!! I felt dumb when I first saw a video of someone really cocky because he did understand it. I wasnt dumber i just had to take the time to educate myself. I hope when I go to school my teachers are as good as you.
Thanks so much Luis and make sure to check out the video I just published on does a minisplit need a condensate trap. I get into more detail there, thanks!
During home inspections I would talk about the vacuum effect when there is no trap. If the unit is in the garage or close to where there might b some chemicals, fumes can be sucked up into the air flow going to the home and if that happens because there is no trap at the condensate line no one will know where the Oder is coming from. So the trap here is rather important!
Never realized while the air flowing through the evap is on its way to the cold outlets, it will pull air back through the drain tubing---perfectly logical. The back pull would be untreated air as well. We had our system changed in 2015 and they installed a trap. I thought it was silly. Now I know!!! Thanks for making the video.
Brilliant. I noticed last year when I happenned to look inside my furnace that the condensor pan was completely full and not draining. I could tell there was negative pressure so I openenned the filter area and sure enough it drained immediately. The system was installed by the previous homeonwer so I have no idea of the experience of the originall installer but they clearly didn’t understand this issue. Great explanation and video.
@@acservicetechchannel could you tell me why water in the drain tray or pan starts flowing out when the pvc pipe system with water filled trap is attached?
Good video. And this ONLY applies when the blower motor is on the supply side of the evaporator causing a negative pressure which sucks air into the condensate pan from the drain. When the blower motor is on the return side of the evap coil, you will have a positive pressure pushing air out of the drain hole and you won't need a p-trap for this
Great demonstration. But this only happens with the coil before the blower. When the coil is after the blower air comes out of the drain pipe and you need a trap to stop the air from escaping. I learned a lot from your channel thanks for the tips!
Thank you very much for clueing me in. That solved the problem of condensate build up in the bottom of my A/C unit. I cut a hole in the piping for easy trap cleaning; I did not realize it receives an internal negative air pressure. I thought it only trapped debris. HAGO; Thanks again!
Keep in mind this is for an air handler and not a coil on top of a furnace. The coil on top of the furnace has positive pressure so you dont need a trap.
The Delta p is small, very little air escapes. You can test this just by running the fan or furnace and very little air comes out of the drain hole, even less if you have a drain hose on it.
I just had my unit serviced. Guy at ACE told me I needed a trap (retired HVAC) guy who serviced unit did not install one. I have an identically appearing unit as the one pictured. Anyways guy called days later and now he said he “forgot to install” and is coming back to place one. Just trying to understand the process and this video was awesome! Thanks
Literally could not understand why my furnace was filling up with water until I watched this video. Thank you so much you saved me an expensive service call.
Great visual for evaporators on the negative pressure side of the blower. You should explain that not all are on the negative side. An explanation of where to put the vent would also be helpful. In my neck of the woods most residential evaps are on the positive side of the blower.
My exact thought. The plus side of adding a trap on a push coil is you don’t lose some of the efficiency of air being leaked out of the drain, but it’s not critical to have one as it is on a pull coil.
Thank you for posting. My apartment AC unit was leajing water all over the drip pan,and the EZ trap was bone dry. After watching your video, I opened the trap and filled the curve with water - hopefully this fixes the issue.
Wow! This is what is wrong with my AC! The person who installed my AC kept saying he had no idea what was wrong with my system and HE INSTALLED it. Thanks! Hopefully my hubby can fix it.
I've serviced a package unit witch had a zone board installed (left) inside the blower cabint wich burned out twice .I was ther on the second call, Noticed it was a little damp and the zone board had moister on it, and that they had short 4" pvc pipe off the drain pan. I added a p-trap, installed new zone board called back a month later to make sure clients system was working. Problem solved . Many techs even some hvac business iv talked to think these ptraps are unnecessary but I beg to differ .NICE DEMO CRAIG!
Unions in condensate lines aren’t necessary,a simple tee with a cap or a modern float switch has what you need to disassemble without any problems to clean………or best thing I’ve found after over 20years of doing it is a simple shop vac,connect it outside and it will suck all the bs out and then put the cleaning tabs in the evaporator coil pan and your g2g……..or your nitrogen tank with a simple Freon line hose will blow everything out from the inside out.
Best ever demonstration! I don't think mine is linked into a trap but it I think the broken humidifier and furnace are linked into the line too. Furnace is under ac unit and has some sort of black box cleanout
Absolutely! We put 8 months of work into fine tuning those questions and they are the very ones I would like every tech to know pertaining to the book, thanks!
Some Carrier AC’s have a built in trap in the Drain Pan, so you need to look and/or check the units literature. It you can’t see directly thru the opening to the drain pan, or from inside the drain pan to the pipe. Then check the literature.
Great video! There should also be a vent pipe on the left (output) side of the trap you show in the beginning of the video. I remove the red cap on the trap and put the tube there.
Now I know why there’s a P-trap before the condensate pump. Thank you. It didn’t make any sense why a trap was necessary when no sewer gases would get through the condensate pump.
While that is a true point, however, a trap still serves a purpose in a positively pressurized cabinet (or unit), as it prevents the conditioned air from escaping. In terms of wasteful energy, can be compared to why they seal all the seams in the ducting.
Very Valuable Information that I was looking for I bought your AC book And I learned A lot, I can't wait Tell I see your book on Furnaces trouble shooting Specially on high efficiencies. On the market.
Thanks for such grt explaination, it's very rare that we can see a demo, which you have provided. Requesting if you'll can also provide the maths related to p trap..or thump rule... thanking you.
A B, the higher the static pressure in the system, the more need for a trap there is. You can't go wrong with a deep U trap but in most cases a p-trap will suffice. The biggest thing is making sure that a PM includes the cleaning of the trap or that the building owner is aware to clean the trap one to two times a year, thanks!
I love those clear EZ trap! Don't like the shallow trap, they dry up in winter, first summer cooling = leak! In that case I make a deep one that can never dry out. Btw In case of positive pressure unit, no trap is required
@@abnergarcia6252 He means that if the blower pushes the air through the coil and not pulls..Blower is beneath the coil. in the video the blower is above the coil.
eddman32 thank you! So in the video the unit is a “negative” pressure unit? Anytime the blower “pulls” from the coil is a negative unit? Very interesting. After this video I found another video on “Expert Express Plumbing Heating....” where he shows the effect of high static in a zone system. And it was a horizontal left unit, but the water was being pushed out of the secondary drain plug.
Abner Garcia. The vast majority of units the blower "sucks" the air across the coil. In the minority are units that are either "ambient" pressure; or blower is upstream so that the air is "blown" ie positive pressure
I don't have a trap on my system, but the drain runs well for a 4 ton unit. I suspect when I install this same trap tomorrow I'll pull even more condensate from the unit! And I thought my AC man was top notch... apparently not.
Love the video, but one clarification. You only need a trap if the coil is on the negative pressure side of the fan. In the North, most of what we install are a gas furnace with the evaporator coil on top of the furnace. No trap is needed because the force of the blower is positive.
I’ve always puts traps because all the debris that will eventually get clogged will get clogged there and not in the wall or somewhere that is harder to get and then when it clogs a pipe cleaner and bleach is all you need 👏
This can happen on positive pressure units aswell, altough probably not as common. If the drainpan outlet is connected with a hose that is way thinner then the drainpan outlet pipe diameter, the velocity of the air passning makes drainage impossible, at least as long as fanspeed is high.
The evaporator on my system is after the fan so no p-trap is necessary. But it does drain into the sanitary sewer so there is a p-trap where the tube drains into the sanitary sewer.
Two new carrier air conditioning systems. In two years, the condensate shallow traps, fungus slime blocked one and partially blocked the other. Water overflowed on one pan and was about to do the same on the other. The traps were removed, both drains went to down to a floor drain. No problem in six years, they both drain while the system is operating. How enough air from a fan could develop enough vacuum and stop water draining into a pipe, that drops down to the floor defies physics. If you drain is shallow, that may pose an issue, however, the traps should be clear so the home owner can check it.
Mine drips the entire time its on...doesn't speed up when the blower shuts down...My tech added a "chimney" to the "T" that exits the side of the A coil drip pan.. It sucks air over the draining water...
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Good berthed sher thankyou gues ok
That covers everything ,nice share , practical demo on point.,, Clean out cap for vent.,👍💪🤔🙏🖖✌️
I've seen a lot of discussion on whether a positive pressure evaporator (like one on top of an upflow furnace) needs a trap or not. While it doesn't cause the drain issue like a negative pressure, it does eliminate air leakage. Please share your opinion on this. I am a HS HVAC teacher and I'd love to know your thoughts.
Any reason it the pvc needs to be glued?
No matter how many times this is explained verbally, the phenomenon of negative pressure is not usually well understood to most until they see it in real time. This is a terrific demonstration!
I still don't get it. I see that it works but no clue why. Thanks for saying negative pressure so I know what to search for!
@@thejohnbeck lol first its funny seeing such a recent comment to an older video, right in line to what I was thinking as well. But I found the answer. When the system is running and sealed, and the fan in the system is moving air, it is on the input side (in this setup). Meaning its a vacuum, or under negative pressure. The drain is like a straw, so while the fan is on, the drain is sucking in air. (I wrongly assumed in the video that "system running" was focusing more on the temperature of the evap coil since he focused on it). When the fan stops, there's no sucking, and the pressure inside that area and outside are equal so the water is free to move via gravity. The trap on the drain needs to be filled with water or it doesn't work, because the weight of the water is more heavy than the sucking vacuum of the blower motor in that small area, so air cannot come up inside, so the water can move under gravitational forces, without being pulled back into the pan. Real world example. You get a fresh frosty milkshake from wendy's and go to suck on the straw. It's too thick but you kinda try again, but as you give up, the negative pressure in the straw makes your spit backwash into the straw.
@@nikolaoslouvros3618 the spit explanation did it for me
I still don't get it =(
No ok. I get it. It's just sucking air in through the drain line. The P trap basically plugs it so it's harder for air to be sucked in that way.
Im always amazed at what i dont know! Im not in the hvac industry but i appreciate the science involved in your field. Your a great instructor!
I am HVAC contractor with ~10 years of experience. I think that this video is the best explanation why do you install that p-trap on the condensate line so far. :) Thank you!
WHAT DO YOU CHARGE?
When we moved into our new house in North Florida about 8-years ago, we soon started to have filter failures from moisture. This was happening every 1-2 months, and at times the failed/wet filter media would get blown up into the underside of the coils. It was quite maddening. After considerable research, I found a similar video and installed the clear trap you've shown in your video. After that, no more issues.
I'm a bit confused why something so critical can be missed by the Building Inspector, and the private Home Inspector that I contracted to check the house out before we purchased it.
You've done the best job explaining why the trap is needed, that I've ever seen. Great work!
Thanks a lot Terry!
Ha ha ha. Inspectors. That's a good one. They nitpick little things that don't mean a bit of difference, but anything important they forgot to mention in inspector school. Here's 10 pages of bullcrap that needs to be fixed. Give me my check.
I have been doing HVAC 8 years and never had such a good example of condensate traps.
Again, well done! Getting this point across to installers that are trying to “just get the job done “is critical. No excuses for not having a trap installed.
This is the best video I found to fix the problem I have with my air handle thank you so much
Thank you !!!! I felt dumb when I first saw a video of someone really cocky because he did understand it. I wasnt dumber i just had to take the time to educate myself. I hope when I go to school my teachers are as good as you.
Thanks so much Luis and make sure to check out the video I just published on does a minisplit need a condensate trap. I get into more detail there, thanks!
I like this man, every time see his video learn new things.
Thank you so much for all the videos.
You are good teacher :)
Glad to help Latif!
Next level cool deal.👍✌️🙏
During home inspections I would talk about the vacuum effect when there is no trap. If the unit is in the garage or close to where there might b some chemicals, fumes can be sucked up into the air flow going to the home and if that happens because there is no trap at the condensate line no one will know where the Oder is coming from. So the trap here is rather important!
Wouldn't the Trap as he has it here, be more likely to suck in the chemical smells? It is sucking in air right where the AC unit is.
Never realized while the air flowing through the evap is on its way to the cold outlets, it will pull air back through the drain tubing---perfectly logical. The back pull would be untreated air as well. We had our system changed in 2015 and they installed a trap. I thought it was silly. Now I know!!! Thanks for making the video.
Brilliant. I noticed last year when I happenned to look inside my furnace that the condensor pan was completely full and not draining. I could tell there was negative pressure so I openenned the filter area and sure enough it drained immediately. The system was installed by the previous homeonwer so I have no idea of the experience of the originall installer but they clearly didn’t understand this issue. Great explanation and video.
thank you, one of the best explanation. very professional
Glad it was helpful!
@@acservicetechchannel could you tell me why water in the drain tray or pan starts flowing out when the pvc pipe system with water filled trap is attached?
@@sujithsurendran7672 Yeah, how exactly does the trap with water counteract the negative pressure of the flowing air?
Good video. And this ONLY applies when the blower motor is on the supply side of the evaporator causing a negative pressure which sucks air into the condensate pan from the drain. When the blower motor is on the return side of the evap coil, you will have a positive pressure pushing air out of the drain hole and you won't need a p-trap for this
great point! i was left wondering why my system continues to perform fine without a trap, but you've answered it!
You still need it, that's air loss going out of the condensate line.
Same here. Works fine. I lose very little air with my design
Very good. Thank you for your service to the industry!
Thanks a lot Chip!
I don't like ptrap dust build up in it
This was the best visual example I’ve ever seen thank you so much.
Great demonstration. But this only happens with the coil before the blower. When the coil is after the blower air comes out of the drain pipe and you need a trap to stop the air from escaping.
I learned a lot from your channel thanks for the tips!
Great point. This something missed in the video
how would a trap stop the air from escaping if there wasn't water in it first
And I thought traps were for catching wedding bands only.
You guy's are a class act. Ty for sharing. Definitely looking into your E book.
Awesome, thanks!!
Very informative. As a plumber this broadens my knowledge. Thanks
Glad it was helpful!
Thank you very much for clueing me in. That solved the problem of condensate build up in the bottom of my A/C unit. I cut a hole in the piping for easy trap cleaning; I did not realize it receives an internal negative air pressure. I thought it only trapped debris. HAGO; Thanks again!
Simple, but excellent demonstration!!
Glad you liked it!
WOW 😮👍😅 I'm glad i Stumbled on this video 👍
Thank you Teacher Craig. That's Why I Always follow his videos teachings ❤️
Thank you for watching!
Keep in mind this is for an air handler and not a coil on top of a furnace. The coil on top of the furnace has positive pressure so you dont need a trap.
That makes sense why my unit doesn't have a condensate trap
Trap will keep cool air from escaping though right?
The Delta p is small, very little air escapes. You can test this just by running the fan or furnace and very little air comes out of the drain hole, even less if you have a drain hose on it.
Your a dynamic instructor in all facets of AC Thank You.
I appreciate that!
I just had my unit serviced. Guy at ACE told me I needed a trap (retired HVAC) guy who serviced unit did not install one. I have an identically appearing unit as the one pictured. Anyways guy called days later and now he said he “forgot to install” and is coming back to place one. Just trying to understand the process and this video was awesome! Thanks
Literally could not understand why my furnace was filling up with water until I watched this video. Thank you so much you saved me an expensive service call.
Great visual for evaporators on the negative pressure side of the blower. You should explain that not all are on the negative side. An explanation of where to put the vent would also be helpful. In my neck of the woods most residential evaps are on the positive side of the blower.
You are right
My exact thought. The plus side of adding a trap on a push coil is you don’t lose some of the efficiency of air being leaked out of the drain, but it’s not critical to have one as it is on a pull coil.
Thank you for posting. My apartment AC unit was leajing water all over the drip pan,and the EZ trap was bone dry.
After watching your video, I opened the trap and filled the curve with water - hopefully this fixes the issue.
Wow! This is what is wrong with my AC! The person who installed my AC kept saying he had no idea what was wrong with my system and HE INSTALLED it. Thanks! Hopefully my hubby can fix it.
Never too old to learn! Thanks
You got that right!
Very happy you made this one
Hope you enjoyed it!
I was wondering why there is a trap on my system. You learn new stuff every day
I've serviced a package unit witch had a zone board installed (left) inside the blower cabint wich burned out twice .I was ther on the second call, Noticed it was a little damp and the zone board had moister on it, and that they had short 4" pvc pipe off the drain pan. I added a p-trap, installed new zone board called back a month later to make sure clients system was working. Problem solved . Many techs even some hvac business iv talked to think these ptraps are unnecessary but I beg to differ .NICE DEMO CRAIG!
Great video, thanks!
You are amazing, I lear a lot from you !! Keep it up the good teaching!! Best!
Thank you! Will do!
Ahhh makes sense. The blower creates a Venturi effect on the trap drawing air in when not primed. Thanks.
Great explanation, very informative. Great video. Thanks for making.
Glad you enjoyed it!
Your videos are always so good.
I appreciate that!
Excellent explanation, as always. Thank you Craig. Stay safe!
Thanks a lot Ma ma!
I will be buying your book, workbook and charts very soon. I’m a maintenance man in an apartment complex and I’m finding your videos invaluable.
Thank you very much! We do try to provide information, methods, and procedures in layman's terms so that they are easily understandable, thanks!
good idea to put a union or slip compression fitting near the between trap and the unit ...easier to clean out the slime and crud ..
Unions in condensate lines aren’t necessary,a simple tee with a cap or a modern float switch has what you need to disassemble without any problems to clean………or best thing I’ve found after over 20years of doing it is a simple shop vac,connect it outside and it will suck all the bs out and then put the cleaning tabs in the evaporator coil pan and your g2g……..or your nitrogen tank with a simple Freon line hose will blow everything out from the inside out.
I am in HVACR school and I was just asking my teacher this same question the other day in class
Awesome, thanks HVAC with Greg!
Thank you for the explanantion. I’m glad I put the ez trap on my new AC last month.
Absolutely, nice cleanouts!
Thankyou gues
Best video on ac
Wow, thanks
Thanks for sharing. Something this smart and inexpensive seems like it should be a standard.
Wondered why the condensation was not drawing whilst on! This is a great channel to learn! I have learned so much since I found this channel .thanks .
Best ever demonstration! I don't think mine is linked into a trap but it I think the broken humidifier and furnace are linked into the line too. Furnace is under ac unit and has some sort of black box cleanout
Great advice!
Thanks so much!
You are very GOOD, thank you! Very well explain, great teacher; you're truly know this stuff, wow.
thanks for that demo! I recently encountered this at work.
Glad I could help!
Well done !!! This video is a great industry tool
Thank you this detailed explanation 💎
Definitely every air handler needs a trap, but in some cases ac and furnace don't require. But it's good practice to just use one
Got you’re book last year and it’s nice to have. I didn’t not know about the trap for the drain on the coil. Good stiff
Thanks a lot Martin!
I love how clear your explanations are. Great channel!
Thanks a lot The Air Conditioning Guy!
Love the visual demo - AWESOME!
I didn’t know you had a workbook! I’m buying that!
Absolutely! We put 8 months of work into fine tuning those questions and they are the very ones I would like every tech to know pertaining to the book, thanks!
Well explained thanks
Glad it was helpful!
Just a great explanation thank you very much
Glad it was helpful!
You guys are great
Thanks so much!
Additional information
Another tips and ideas
Thanks for sharing dude.🤔
Thanks other 91 solution!
Thanks again Craig for another great and knowledgeable video 👍👍
Glad to help!
Excellent, thanks
Glad you liked it!
Some Carrier AC’s have a built in trap in the Drain Pan, so you need to look and/or check the units literature. It you can’t see directly thru the opening to the drain pan, or from inside the drain pan to the pipe. Then check the literature.
Great video! There should also be a vent pipe on the left (output) side of the trap you show in the beginning of the video. I remove the red cap on the trap and put the tube there.
Now I know why there’s a P-trap before the condensate pump. Thank you. It didn’t make any sense why a trap was necessary when no sewer gases would get through the condensate pump.
Amazing Explanation, but should have mentioned negative pressure with a trap and Positive pressure without!
While that is a true point, however, a trap still serves a purpose in a positively pressurized cabinet (or unit), as it prevents the conditioned air from escaping. In terms of wasteful energy, can be compared to why they seal all the seams in the ducting.
Thank you.👍👍
Welcome 👍
clear concise explanation...
ps... not only blocks air, but also insects
Always wondered why a trap? Thanks
Always an excellent explanation!! Thank you!!
Very helpful 👍
Glad to hear that
Thank you so much
You're most welcome
i use a tablespoon of bleach once a month when I use my ac, but my unit is smaller 2t. but this is good info, good job.
Very Valuable Information that I was looking for I bought your AC book And I learned A lot, I can't wait Tell I see your book on Furnaces trouble shooting Specially on high efficiencies. On the market.
Very good video, i watched other video and i couldn't understand. Thos very well explained. 👏🏼👏🏼
Well I learned something today.
Thank you
You're welcome
very useful, thanks
Glad it was helpful!
Love your channel
Thanks Clarence!
great video
Thanks for the visit
Thanks for such grt explaination, it's very rare that we can see a demo, which you have provided. Requesting if you'll can also provide the maths related to p trap..or thump rule... thanking you.
A B, the higher the static pressure in the system, the more need for a trap there is. You can't go wrong with a deep U trap but in most cases a p-trap will suffice. The biggest thing is making sure that a PM includes the cleaning of the trap or that the building owner is aware to clean the trap one to two times a year, thanks!
@@acservicetechchannel thanks alot
Gr8 vid ty
Great job
Thanks a lot Donnie!
Amazing greatly appreciate all the information 👍🏽
I love those clear EZ trap! Don't like the shallow trap, they dry up in winter, first summer cooling = leak!
In that case I make a deep one that can never dry out.
Btw In case of positive pressure unit, no trap is required
Nathan what do you mean in case of a positive pressure unit a trap is not required?
@@abnergarcia6252 He means that if the blower pushes the air through the coil and not pulls..Blower is beneath the coil. in the video the blower is above the coil.
eddman32 thank you! So in the video the unit is a “negative” pressure unit? Anytime the blower “pulls” from the coil is a negative unit?
Very interesting.
After this video I found another video on “Expert Express Plumbing Heating....” where he shows the effect of high static in a zone system. And it was a horizontal left unit, but the water was being pushed out of the secondary drain plug.
Abner Garcia.
The vast majority of units the blower "sucks" the air across the coil.
In the minority are units that are either "ambient" pressure; or blower is upstream so that the air is "blown" ie positive pressure
@@abnergarcia6252 A fur down unit is a positive pressure unit(apt complexes).
I don't have a trap on my system, but the drain runs well for a 4 ton unit. I suspect when I install this same trap tomorrow I'll pull even more condensate from the unit! And I thought my AC man was top notch... apparently not.
Love the video, but one clarification. You only need a trap if the coil is on the negative pressure side of the fan. In the North, most of what we install are a gas furnace with the evaporator coil on top of the furnace. No trap is needed because the force of the blower is positive.
I’ve always puts traps because all the debris that will eventually get clogged will get clogged there and not in the wall or somewhere that is harder to get and then when it clogs a pipe cleaner and bleach is all you need 👏
This can happen on positive pressure units aswell, altough probably not as common. If the drainpan outlet is connected with a hose that is way thinner then the drainpan outlet pipe diameter, the velocity of the air passning makes drainage impossible, at least as long as fanspeed is high.
Thank you for getting straight to the point skipping all the BS.
What is the other plug for? I have water dripping out of the plug but very little coming out of the water line tubing. No trap either.
The evaporator on my system is after the fan so no p-trap is necessary. But it does drain into the sanitary sewer so there is a p-trap where the tube drains into the sanitary sewer.
Excellent video
Great video.
Two new carrier air conditioning systems. In two years, the condensate shallow traps, fungus slime blocked one and partially blocked the other. Water overflowed on one pan and was about to do the same on the other. The traps were removed, both drains went to down to a floor drain. No problem in six years, they both drain while the system is operating. How enough air from a fan could develop enough vacuum and stop water draining into a pipe, that drops down to the floor defies physics. If you drain is shallow, that may pose an issue, however, the traps should be clear so the home owner can check it.
I often see one of the p trap risers uncapped. In your video you have both of them capped. Can you please elaborate. Thank you for great videos.
It helps keep out bugs also add for some vacuum relief it needs to be cleaned per season
Nice demo Craig.
Thanks a lot HVAC 1!
Mine drips the entire time its on...doesn't speed up when the blower shuts down...My tech added a "chimney" to the "T" that exits the side of the A coil drip pan.. It sucks air over the draining water...
Another great video. Thanks for sharing
Thanks a lot Dean Martin!