I believe that the water pressure from a tank can be increased by putting a 6 foot loop in the pipe leading from the tank. The water pressure coming out of the pipe will be higher than if the pipe was run straight. Is this true, and why?
How do you increase water pressure by useing a loop in the supply pipe?
No, it is not true, assuming that is the only change you make.
The formula for laminar flow through a tube is as follows:
F = (P1-P2) R^4 / (V x L) or writing it out
Flow is equal to (the pressure difference) times (the radius of the pipe to the fourth power) divided by the (viscosity times the length).
Long story short, if you double the length of pipe, you cut the flow by half. It is an inverse but proportional relationship.
Adding 6 feet to the pipe will add length and cut flow.
Also, if you have a modern up to standards plumbing system, there is a pressure regulator on the supply side of your line, so no matter what you do, that is what limits the pressure.
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