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Author:
holder4plumbing (TN)
My water heater connections are at top. Was installed with a PVC shutoff valve that is simply stuck (afraid to force and break it, and it's never been actuated the in several years since installation). I need to do some PVC pipe work under kitchen sink, which is probably the lowest point the hot water flows to. (Basically, at the end of the 1/2" PVC is a very old spigot like out side a house, which is what my dishwasher hose is attached to; I'd like to cut the PVC clean, and attach a Shark Bite shutoff valve (has a 3/8" compression to connect my new dishwasher hose to)... Question is this: if I cut off my water main, will the hot water siphon out, or just what's already in the pipe going to under the sink? Would it help or hinder to open hot faucets elsewhere? If it matters, the water heater is on same floor as kitchen; the PVC going in and out of it flow thru pipes under crawlspace before coming up under kitchen sink. As far as the Shark Bite valve, all I need to do is cut PVC clean, deburr, and push on, at least that's the plan. But I don't want a continual flow of water in the meantime.
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Author:
m & m (MD)
Your water heater will siphon up to a point. It would be better to attach a hose to the drain valve and drain off five gallons before starting. Shut the power off just to be safe.
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Author:
Pipe runner (AZ)
are you sure PVC? code prohibited inside a house.
one of the cool things about shark bite fittings is ease of installation
if you make your cut (with the water main off of course) and then quickly push on the SB valve
you won't have a big mess on your hands.
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Author:
holder4plumbing (TN)
Thanks. It's really CPVC of course... Yes, I think the Shark Bite will work out great. I presume they hold up for years. I know they have the O-ring, but I don't fully understand the "teeth" part.
Edited 1 times.
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Author:
bernabeu (SC)
look inside CAREFULLY
it is fairly obvious
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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638
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