How to stop hot water from cold water faucet

[Ken-Judy]

Just took delivery of new 2012 Flagstaff 831QBSS. When the cold water faucet is turned on, hot water comes out during the first 10 to 15 seconds. I'm guessing the cold water line must be routed close to the hot water tank and is picking up radiated heat. Not sure that's the cause because the hot water tank is not accessible for inspection without removing some cabinet panels. I'd rather not be giving up holding tank space while waiting to get past the hot water every time I turn on the cold water faucet.

Any thoughts or suggestions.

[fonzie]

Check if your hot water tank by-pass valve is fully closed

[Ken-Judy]

Thanks for suggestion. Yes, hot water bypass valve is fully closed.

[campdohbrew]

You probably hit the nail on the head "the cold water line must be routed close to the hot water tank and is picking up radiated heat." I assume you get the 10 - 15 second hot water flow at each cold water faucet location which would verify your theory.

Moving those cabinet panels is probably not worth it unless you are using a lot of cold water. Of course, you might be as I and like for things to work as intended and if they don’t, it just bothers me to no end. If that is the case, you and I both know you’ll be moving those cabinet panels. Have some pipe insulation on hand to make double doggone sure.

[Marc73]

Check to see if there is a backflow preventer at hot water heater on hot side.

[VTX Al]

Originally Posted by Ken-Judy

Just took delivery of new 2012 Flagstaff 831QBSS. When the cold water faucet is turned on, hot water comes out during the first 10 to 15 seconds. I'm guessing the cold water line must be routed close to the hot water tank and is picking up radiated heat. Not sure that's the cause because the hot water tank is not accessible for inspection without removing some cabinet panels. I'd rather not be giving up holding tank space while waiting to get past the hot water every time I turn on the cold water faucet.

Any thoughts or suggestions.

You always need some water for something. Just run it into a container (pot, saucepan, etc) until running cold and leave it on the stovetop until you need it. This works just as well when waiting for hot water to come through.

...VTX-AL

P.S. Not-needed clean water does not have to take up space in your waste holding tank. Just toss it outside - water a tree or something .

[mtnguy]

I am not so sure that hot water coming out of the cold water faucet is such a bad thing......ideal for a quick hand wash.

[windrider]

Post #1 "the hot water tank is not accessible for inspection without removing some cabinet panels." This was at 9:24 pm. original poster. Post #3, "Yes, hot water bypass valve is fully closed. " by the original poster.

If he just took delivery of a 2012, it came from the factory winterized. Depending on the dealer, it may not have been winterized. The only thing to cause this is the by pass valve on the water heater. No way the cold water line is close enough to the heater to pick up radiant heat. Water are surrounded in Styrofoam, and you can't feel any heat on the outside of them. The other clue he mentions in post #1, "10 to 15 seconds". There isn't that much water in the lines. I haven't caught up on all the post yet, but if he takes a shower it will cold, and his next thread will be "NO HOT WATER"

[trudinator]

Originally Posted by VTX Al

You always need some water for something. Just run it into a container (pot, saucepan, etc) until running cold and leave it on the stovetop until you need it. This works just as well when waiting for hot water to come through.

...VTX-AL

P.S. Not-needed clean water does not have to take up space in your waste holding tank. Just toss it outside - water a tree or something .

I try to save water gathered in this manner (waiting for the cold to get hot, etc., to use after dumping my black tank. A gallon or two with the soap and Calgon is all you need and you don't waste water this way. I just keep a bucket in my shower.

[Iggy]

Originally Posted by windrider

Post #1 "the hot water tank is not accessible for inspection without removing some cabinet panels." This was at 9:24 pm. original poster. Post #3, "Yes, hot water bypass valve is fully closed. " by the original poster.

If he just took delivery of a 2012, it came from the factory winterized. Depending on the dealer, it may not have been winterized. The only thing to cause this is the by pass valve on the water heater. No way the cold water line is close enough to the heater to pick up radiant heat. Water are surrounded in Styrofoam, and you can't feel any heat on the outside of them. The other clue he mentions in post #1, "10 to 15 seconds". There isn't that much water in the lines. I haven't caught up on all the post yet, but if he takes a shower it will cold, and his next thread will be "NO HOT WATER"

I agree. No way unless the bypass valve is leaking or the water lines were switched at that sink. You do know how to use the single handle faucet correctly? Just asking to be sure.