How to Drain and Refill Your Heating System - Quick and Easy Guide
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- เผยแพร่เมื่อ 7 ก.พ. 2025
- In this video i will be showing you how to drain and refill a pressurised heating system so that you can complete heating system maintenance with ease. I will explain the complete process including the correct tools and methods to speed up the process and make it easy. If you like the content leave a like and please subscribe for more content like this as I've got a lot more to come and there will be something that will help you out.
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Hope this one helps. More heating later this year but it’s almost time to get outdoors and get on with some much bigger projects!
Do you do still paid jobs and what areas do you cover? Just wondering in case I need a job doing from someone who knows his stuff!
I have a gravity fed system and needed to add some fresh inhibitor. Was December but it was 15 minute job, done it before and I was at a loose end. Drained fine but system only filled with a fraction of water. Turned out one of the pipes near the pump was blocked by a combination of rust and scale which had come down from the header tank (which had a shed load of scale in the bottom). 15 minute job turned into one that took several hours by the time I had cleaned out header tank and replaced the blocked section of pipe. Top tip - a magnet can help you find a section of copper pipe blocked or partially blocked by rust (magnet won't stick to a copper pipe but will stick to a section blocked by rust). Second tip - do things like this in the summer, even if it is only a 15 minture job!
Great explanation mate 👍🏻👍🏻
Amazing!!! Been waiting 8 months for you to do this one 😂 iv fumbled trough 3 drainings and replacing radiators etc recently and iv been certain youd come up with a better way 😂
Just found your channel & can’t praise it enough. Great stuff…informative, easy to follow, done at the right level & gives you the confidence to do stuff yourself! Thanks mate👍
Many thanks for another great video, easy to follow and helpful.
Brilliant
Thanks for the upload Cameron, always top content!
Two quick questions from me..
1. Do you only need to let air in on the one radiator at the highest point to release the vacuum? or do you need to do this on all Rads above the drain off point?
2. When you drain the system, does it actually only remove the water from the system from the upper floor rads? The ground floor rads & pipes will still contain water? Ground floor rads need to be drained individually for a full drain down??
Thanks again 👍🏾
1) all of them 2) no, it drains all
Another great video, looking forward to the next one 👍
Just spent the day fitting a towel rail, a vertical column radiator and a new magnetic filter. Am i going to watch this video? Absolutely.
Hi, Great vid!! Is the theory the same if my boiler is upstairs?
Just what I needed in the nick of time, thanks
Your welcome
Another great video, one question for maintenance how often should this be carried out ?
Great channel 🎉thank you
Thanks clear and easy to follow instructions .
Glad it helped
Thanks for the great diy video, do you recommend flush the radiators before refill it? How long you recommend the flushing? Thanks!
My boiler gave up the ghost after 14 years on Thursday these have came in handy
Great video. I’d be grateful if you could do a video on flushing the system. A power flush.
Very informative, thank you 👍
Anytime 👍
great vid usual - any additional steps if my WB combi is in the loft so way higher than any of the rads ?
No, as long as the boiler is off and you drain all the water down through the drain offs you’ll be fine 👍🏻
Thank you for your teaching!
My pleasure!
I have a Worcester combi and also a water softener. Is it still necessary to bypass the softener to fill the boiler, or is it a myth that softened water damages the aluminium heat exchanger?
Just a quick question as i'm tempted to do this soon, could you turn on the inlet whilst draining to add more flow and force it to be a flush instead of a drain?
Thank you 👍
You are welcome
👍👍👍. Thank you
That's interesting, thank you.
Very welcome
"Each sunrise marks a new page in your epic story."
I have smart TRVs. Would i just have to turn the heating on via the app first then turn the boiler off to open up all of the radiators
Very helpful and much appreciated, unlike his sporting his seriously disfigured arms.
So if I’m moving an upstairs radiator to a different wall, no need to drain the whole system?
Strictly speaking your diagram explaining the system is wrong. In reality you have a flow and return, Each radiator has a flow connection and a return connection, your diagram suggest if you have one closed valve on the system the other radiators wont work.. The diagram you've drawn is the way a ring main works for electricity. Not knocking the video its just abit misleading
It is misleading and will lead to many thinking they have drained the system and are happily working away when GLUG and the nice carpet gets covered in black water. You have to let the air out of all of them upstairs and downstairs to be safe.
Great vid, the link for the wet vac doesn't work
Thank. Cheers fixed it
👍 👍 💯 Teach
Always
Hi. Just and observation. Your diagram is incorrect. It shows a series system. Modern systems are in parallel, flow and return to boiler, so if one radiator is blocked it won’t stop the whole system.
If you don't have a drain valve fitted on a radiator you can drain from the boiler
How do you drain it if you don’t have a drain valve
Undo the nut slowly place a bowl or a plumb tub under it let it fill and tighten the nut empty, and keep doing the same til the system is empty. I've done this a few times as none of my radiators have drain valves
@@francoisreeve4110 I agree with this approach. Then don’t forget to install some drain off valves before you fill back up. Make your life easier next time 👍🏻
@@DjGiluk yea I'll definitely do that one day, maybe lol too many jobs on the to-do list
I’ve just checked, our pressurised system doesn’t have a drain valve fitted to it.
Wow
👍
Wait, what?
I thought the radiators were all in parallel! (Well, the heating systems I've worked on)
Except my radiators don't have drain valve...
The black radiator water should be safe for your grass. It's just rust.
👍
Can you just drain a rad? I have one rad that refuses to get hot
Yep you can indeed
@TheDIYGuy1 how???
You can shut both valves on either side of the radiator and then slacken the union connecting the trv or the lockshield and place something like a collapsible bucket underneath it. You then let the water drain out and if you want to speed it up open the radiator bleed valve. This can be risky when you rely on TRV for isolation as i have heard stories before of them opening up if a house gets cold enough as they have a frost protection setting.
Yeah... Just did this 2 hours for this video released haha.
Haha typical