I'm in a brand new house that has all PEX lines on both the hot and cold side. The manifolds for both hot and cold are copper. The hot side has two spare ports but the cold side is completely full.
I want to install a sink in the basement. Can I simply just "T" off of one of the existing cold PEX lines? If so, do I have to worry about pressure decrease and is there any particular lines I should avoid "T"ing off of?
you could T off any cold line...if you could add a brass T into the header for say the bathroom upstairs then reconnect it onto the run and the new cold onto the BULL.that will eliminate any cutting of lines...pressure wise for all you use a sink down there the pressure is always there if the reast of the show is closed not being used,then you'll have regular pressure...
So are you saying to solder on a T right onto one of the "bulls" then connect the two lines OR cut the line for the sink upstairs just a couple of inches above the bull and then insert the T into the short line then reconnect the sink and new line to the remaining openings on the T?