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Author:
squashem (Non-US)
I have devised a way to modify my outside backyard spigot to have HOT, COLD or range">WARM water in order to fill my kids swimming pool with water that does not freeze them. While my design has worked great, I failed to consider the potential for back-flow hence my post here. My issue is that COLD water is backfolwing into my HOT water lines that feed my house resulting in luke warm water to the house where there should be HOT water. This happens ONLY when the control valves in the images below are engaged.
I am attaching 2 images, IMAGE-1 is the digram of how I created the semi-solution, and IMAGE-2 is the actual image of what I assembled.
IMAGE-1: [www.dropbox.com]
IMAGE-2: [www.dropbox.com]
I think all I need to solve the problem is 2 in-line check valves to prevent HOT water entering the COLD line, and COLD water entering the HOT line, but I am not 100% sure which is why I am asking here.
My Questions:
- Am I correct that I need to use 2 inline check valves to fix this? If so, do they go BEFORE or AFTER the control valves?
- I am using PEX pipe if that matters, what type of check valve should I be purchasing?
Additional Notes:
- I live in Canada (if that matters)
- I am using 1/2 in PEX Pipe with Compression connectors in the entire house (if that matters)
- In IMAGE-2, those are the actual positions of the control valves that send warm water to the backyard spigot, and cause the back-flow problem to the rest of the house.
Thanks in advance for any and all advise.
Edited 2 times.
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Author:
m & m (MD)
There are two solutions to your problem: always turn off both hot and cold ball valves after using, or, install check valves between ball valves and tee.
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Author:
packy (MA)
moen use to make a hot and cold outside faucet. don't know if they still do??
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Author:
squashem (Non-US)
@ m & m - Ok thanks so this answers some of my questions. So from your reply I understand that I am correct in that I will need 2 check valves. Thanks for confirming they get installed between the tee and the valves I was unsure on that part.
My last question is what kind of Check Valve should I be purchasing? I know I need it to be 1/2" and for water, but I am not sure what kind of valve to get? I have seen PVC ones, Lead, non-lead and so many options not sure which to choose. I need a residential solution and some of the things I find online are commercial grade.
@ packy - I cannot use this moen facet you suggested because my basement is finished and I cannot get another hot water line outside.
Looking forward to your replies.
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Author:
packy (MA)
spring check valve is what i would use..
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Author:
squashem (Non-US)
Thanks for this. I am trying to find a 1/2 spring inline check valve at my local Home Depot or Lowes but I am not having much luck. The closest I have found is 3/4 and appears to be thread-on vs PEX Compression connector style.
My question is:
1) Do I buy this 3/4 one and get a PEX style 3/4in to 1/2in reducer that threads on one side and allows compression connector on the other?
2) Do I buy a different check valve?
Just need some assistance finding the proper valve. Thanks again!
Edited 1 times.
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Author:
packy (MA)
yeah, get the 3/4 inch threaded spring check and adapt it with reducing fittings to suit your situation.
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Author:
squashem (Non-US)
Got it, thanks very much for the help and advise.
Edited 1 times.
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