Forum Title: Why would someone deliberately cross connect hot and cold water lines?
I'm looking for some help regarding a cross connection I found behind a friend's washing machine. There are 1/2" copper hot and cold water lines that come down to the hose connections. Then each line continues down for about another 6". At that point there is a smaller diameter (3/8"?) loop of about 2 feet of flexible copper line that connects the hot water line to the cold. Obviously this is not a mistake - somebody went to a lot of work to add this cross connection. Can anyone explain to me why this was done?
Category: Plumber Post By: DAISY PAUL (Daly City, CA), 09/02/2016

That is bizarre. The piping should have terminated at the hose connections.

- CINDY LAWRENCE (Schaumburg, IL), 09/15/2017

Quote: Originally Posted by Squunk I'm looking for some help regarding a cross connection I found behind a friend's washing machine. There are 1/2 copper hot and cold water lines that come down to the hose connections. Then each line continues down for about another 6. At that point there is a smaller diameter (3/8?) loop of about 2 feet of flexible copper line that connects the hot water line to the cold. Obviously this is not a mistake - somebody went to a lot of work to add this cross connection. Can anyone explain to me why this was done? Quote: Originally Posted by Mr_David can't think of any reason. can I see a picture of the hose connections higher up? The loop at the bottom looks kinked, maybe by design Hillbilly hot recirculating system? I've wondered about a hookup like this to keep hot water in a line. Like when you are taking a shower, cut the shower head off to lather and when turned back on get hit with cold water momentarily (the water being held in the hot water line cooling). Same thing for a clothes or dishwasher. It seems though, without valving, there would be a big use of hot water.

- ANNE MYERS (Tamarac, FL), 09/24/2017

can't think of any reason. can I see a picture of the hose connections higher up? The loop at the bottom looks kinked, maybe by design Hillbilly hot recirculating system?

- BESSIE VAUGHN (Lincoln Park, MI), 10/07/2017

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