Building a Rain Catchment System - Part 2

This is part two of my detailed, narrated series showing the design and build of my small, off grid rain catchment system. I hope to use the system to provide irrigation water to the grocery row garden I'm creating on my off grid forest property as I transition to off grid homestead.
I have tried to include accurate and useful technical information and the calculations I have used to plan the system, and below I have included links to the various fittings and tools featured in the video.
Water Pressure Calculation:
You gain 1 psi of water pressure for each 2.3ft of elevation between the water source/storage and the point of output/faucet. EG: My faucet will be 30ft below my rain barrels, which should achieve approximately 13psi. Just enough to run a low-pressure drip irrigation timer.
Rain Catchment Calculation:
Approximately 0.5 gallons of water collected for each in of rain on each 1 square foot of roof. EG: An 8ft x 16ft (128 sqft) roof will collect 64 gallons of water per inch of rainfall.
This video is part two; connecting the 55 gallon drums and testing the fittings, and repairing a leak. The series covers all the steps from building the base, installing the fittings, plumbing the barrels together, building the catchment roof, running a 200ft buried pex line, installing a freeze-proof hydrant, and maybe even teaching myself to weld!
I will add links to the subsequent episodes above as I upload them over the next few weeks or months as I complete the steps.
Part One: • Building a Rain Catchm...
- - - - - - -
Plumbing fittings shown in this video (not affiliate links):
PVC Tube Fitting, Schedule 40, 1" Barbed x NPT Male
www.amazon.com/dp/B08WWLNP8Q
PVC Garden Hose Adapter 1" NPT x 3/4" GHT
www.amazon.com/dp/B077F6JLQW
Drum Funnel with Screen, 4 Quart Capacity
www.amazon.com/dp/B00DKO4XOM
1" Dia. HydroMaxx Flexible PVC Suction Discharge Hose
www.amazon.com/dp/B01C5ZRSP2
Rain Barrel Spigot Kit, 1" Full Port PVC Ball Valve w Bulkhead Fitting
www.amazon.com/dp/B071HJBFVD
Sediment Filter w 100 mesh and 40 mesh screen
www.amazon.com/dp/B081CN82MB