My 44 year old house is on a slab for the kitchen and a half basement for the rest. I had an unusually high water bill which I suspected was from a leak somewhere. To find out where I turned off all the sources of water usage i.e. toilet, clothes washer, all faucets, dishwasher, and outside hose bibs and visually inspected all the copper lines and fittings for leaks and the copper tubing – no leaks. However, I was still getting a flow reading through the water meter. Next I closed the hot water return from the water heater and the flow stopped.
Because I could see if there was any leakage in the pipes and finding none that told me that somewhere under the slab is where the pipes were leaking specifically the hot water line.
Now the question is after going on line and trying to find out a fix for this under the slab leak, one individual had a video where he inserted 1/2 PEX into the 3/4 copper supply line in order to save busting up the cement floor to replace the copper tube.
Has anybody had any experience doing this? Does the 1/2 ” PEX affect the flow and volume enough to make a difference in the operation of the dish washer and the clothes washer? And is this a reliable fix?
The ironic thing is I remodeled my kitchen last fall and had a new ceramic tile floor installed and I am understandably very reluctant to break up my very expensive floor.
Any suggestions on how to fix this would be appreciated.
EDIT…I meant to say that the outlet from the hot water tank is what I shut off.
Thanks for the suggestions…I think that the best way to approach this is to do as suggested…find a way to route PEX through the walls and abandon the slab piping.