Pressure

warath

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I have found numerous posts on pressure when changing size of pipe, but a bit confused as to if my situation warrants work to "correct".

Water pressure in my house isn't bad, but not great particularly when someone is in the shower and any other water is turned on.

The water enters the house in polypipe from the well, then to 3/4" pipe to the water softener, filter, UV filter, then converts to 1/2" for about 15-20 feet, then to 3/4" across the house where other lines then come off (including the hot water tank via 1/2").

My question is, would it be worth replacing the 1/2" run from the UV filter so that the main "feeder" line in the house is all 3/4", instead of going 1/2 -> 3/4 -> 1/2 again? (so my new line would be into the house all 3/4" then 1/2 feeds to showers, etc)?

Thanks,
 
I have found numerous posts on pressure when changing size of pipe, but a bit confused as to if my situation warrants work to "correct".

Water pressure in my house isn't bad, but not great particularly when someone is in the shower and any other water is turned on.

The water enters the house in polypipe from the well, then to 3/4" pipe to the water softener, filter, UV filter, then converts to 1/2" for about 15-20 feet, then to 3/4" across the house where other lines then come off (including the hot water tank via 1/2").

My question is, would it be worth replacing the 1/2" run from the UV filter so that the main "feeder" line in the house is all 3/4", instead of going 1/2 -> 3/4 -> 1/2 again? (so my new line would be into the house all 3/4" then 1/2 feeds to showers, etc)?

Thanks,

Absolutely increase the pipe to 3/4"!
 
Suppose this was your heart pumping blood and there was a constriction in an artery. Would replacing that piece of artery improve your circulation?:D That is of course a rhetorical question, but the analogy is very comparable.
 
Pi*r^2 using 1/2" and then again with 3/4" and you'll find a HUGE difference in the area, and therefore the ability to flow water through those pipes.
 
area

forget about Pi, since it is a constant. Just square the radii of the two sizesm i.e., --1/2"--.25 x .25 = .0625, then --3/4"---.375 x .375 = .14, to see the difference. 3/4" is more than twice the size and therefore much greater capacity. And the ratio of area to wall surface is also critical, because that determines friction loss, and here, 1/2" also loses out.
 
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