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Thread: Proper pipe sizing on houses and water treatment devices

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  1. #1
    Senior Member Letsrunum's Avatar
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    Proper pipe sizing on houses and water treatment devices

    You should always have (minimum) 1" pipe to tie into past the house valve so you will be able to run multiple things at the same time with no pressure losses. Your limited to 3/4" on electric hot water tanks so it behooves you to use 3/4" copper coming in and out with 1-2times larger pipe when Pex pipe is being used for it's high flow restrictions(friction loss)due to ID comparison between different types of pipe. Pressure can be lowered in the system when designed properly by the plumber(old school design)or your pressure needs adjustment (higher) to increase your flow rate and pressure for performance so you don't see pressure losses. Last thing on the pump installer would be elevation losses to increase your pressure settings. Elevation and small pipe being used causes high flow restrictions and pressure losses that can be seen when opening a tap and looking at a pressure gauge at the same time(a accurate pressure gauge by the pressure tank is not going read the same pressure at the tap due to friction losses through the pipe run) elbows, 45's, and going through different valves all have extra friction losses.

    You need your water treatment guys on the same page as your plumbers when getting in with homebuilders for proper designing(not tring to save money by undersizing the pipe run).

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    Senior Member Letsrunum's Avatar
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    I didn't mention the sprinkler guys because most of y'all know how to run multiple heads at the same time on one pipe run. Makes it easy to know when restrictions are causing a problem with performance.

    Water treatment guys are usually on the same page as well. Plumbers usually need the help on designing a system when they should be spot on with their plumbing skills and knowledge. Where are your flow charts and friction loss charts on different types of pipe and their sizes? Do you guys even know what losses you get from different size meters on city water?

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    Senior Member Letsrunum's Avatar
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    Don't worry Rancher your fellow electricians around here know how to size breakers and wire size so we can send proper voltage to the motor.

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    Senior Member Letsrunum's Avatar
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    Senior Member Letsrunum's Avatar
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    That is not a common setup at all. Not even close valveman!

  6. #6
    Senior Member Letsrunum's Avatar
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    Quote Originally Posted by Letsrunum View Post
    That is not a common setup at all. Not even close valveman!
    Look at the undersized pex pipe coming from the well(with a ball valve on incoming line)and going into the pressure tank. 3 mistakes right off the back without looking deeper into the picture for more issues from the plumbers work.

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