I had a plumber do some water line rough-in a few years ago. Now I want
to connect a sink. Anyway - I'm having a hard time figuring out which
is the hot and which is the cold. One has a square cap - the other is
bullet shaped. Should I assume the square is the hot? Or the other way
around?? I tried testing both lines with the existing H/C water lines
with an ohm-meter to see what was connected to what - but it's all
grounded at the HW heater - so my result was moot.
ANY HELP HERE??
If someone could let me know - it'd be great. Searching by google is
The one on the right is cold, probably. If you want to double
check, shut off the water to the water heater, drain the hot water lines
at a lower sink, then ease on one of the shut off valves. If water
comes out, it's the cold. If air sucks in it's the hot.
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