Check out some similar questions!

gtcmap1 · Nov 13, 2007, 08:38 AM

Need some help. I'm a novice at plumbing but pretty handy.
I am installing a bathroom in my basement.

I will be tee-ing off the main 3/4" copper supply lines with 3/4" CPVC via sharkbite connectors. The 3/4" lines will feed cold and hot water to the bathroom. Here they will be split to 1/2" cpvc to supply the sink, toilet and bath/shower.

At this point the tub is installed and the waste drain connected and tested. I need to stub out the sink supplies, toilet supply and install the shower mixing valve.

When I get all these put in I want to test the lines for leaks before putting drywall up.

What is the best way to do this "leak test". I can cap the sink and toilet supplies and cap the tub/shower outlets.

1. When I turn the water supply on, how do I clear the air from the new bathroom supply lines?

2. Should I put shut-off valves on the lines where I connect to the current copper lines?

Most of the lines will be behind a drop ceiling, except where they have to go in the walls for the sink, toilet, and tub.

Any advice or recommendations would be appreciated.

Thanks,
Chad

gtcmap1 · Nov 14, 2007, 07:32 AM

Does anyone have any ideas that may help me proceed?

ballengerb1 · Nov 14, 2007, 08:41 AM

Hey Chad, you can put caps on your lines, just leave them an inch too long because you will need to cut the CPVC to remove them. Don't worry about about air, if you have a leak anywhere the sir will leak out rapidly and then you will see water dripping, or gushing. Put stop cocks on your sink and toilet supplies but not back where the coopper connects to CPVC, stops go on right after the suplly lines come out of the wall into the bathroom.

gtcmap1 · Nov 14, 2007, 08:46 AM

I was only concerned about putting a valve in the line to the bathroom in order to be able to only shut off water supply to that room when working, instead of the whole house. And if there was a leak detected during testing (as long as it was paste the valve), I could leave the rest of the house operational while repairing. Don't I need to give the cpvc cement time to dry before returning water supply. It was just a thought to keep wife and kids off my back about water supply.

ballengerb1 · Nov 14, 2007, 08:59 AM

The cure time for CPVC glue can be 4-5 hours beore it reaches 100% so take your time. If you just want to isolate the room then you can installthose extra stops and you could then skip the stpos under the sink. However, the cure time is still 4-5 hours. Do it late at night, they'll never know.