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Old 03-26-2018, 07:57 PM   #58
footz1941
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Join Date: Jan 2018
Location: Box Elder
Posts: 247
M.O.C. #21057
Quote:
Originally Posted by BB_TX View Post
If the anti siphon valve is not under one of the sinks it may be inside a wall. I pulled a panel in the basement so that I could see under the floor under the shower. There was a red pipe (shower hot), a blue pipe (shower cold), and two white pipes (black tank flush lines) going up thru the floor. That meant the valve was inside the wall with the shower faucet fixture as there was no other reason for those xtra lines.

Opposite side of that wall is my entry closet. There was an opening on the back wall (about 6” sq with a plastic cover) I could reach thru and feel the valve but could not see it. Had to cut a new opening lower and to the left to remove the antisiphon valve.
Cut them in the basement if you can get to them. Remove or replace down there
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