On Saturday, March 18, 2017 at 9:11:32 AM UTC-4, Bill Gill wrote:
On 3/18/2017 7:22 AM, Joe Mayer wrote:
I have 120psi water pressure at my house and am having a hard time
getting a complete seal on the water connections of my tub faucet.
I had to use a couple of brass adapters to go from a 1/2" copper line to a
3/4" brass connection, so I have more joints than usual. I am using teflon
tape on all the joints and keep getting a little seepage around the joints.
The previous connections on the old faucet with 1/2" connectors were what I
think are called slip joints, using cone-shaped rubber washer. The brass
fittings do not have any kind of compression joint or washer to seal off
the
water, except on the end that connects to the copper line, where a
compression ring seems to be sealing just fine. The other connections
depend on the sealant on the threads. Should I be using permanent pipe
sealer at the threads that do not connect directly to the faucet and the
water line? Or is there something better than teflon tape that I should
use on the joints? I am wrapping about 2 layers of the teflon tape around
the male connectors, starting at the first threads of each joint.

Everybody immediately jumps up and tells you that you
have to have a pressure reducer. I have 120 psi water pressure
and have had hardly any problems. I have one hose bib that I
have a problem keeping washers in, but that hose bib is over
50 years old, and I suspect it just needs to be replaced.
So don't get in a swivet over people telling you what you
absolutely have to do.

As far as the leaks, you might try using the liquid pipe dope.
Put on a good thick coat and screw the threads up tight.

Bill

I agree that the pressure, while higher than normal, higher than
I would ever have, isn't the source of his problem. And there are
some mysteries there, like why there is a washer or seal of some
kind when going from copper to brass. Teflon tape should work,
but I also agree with your suggestion of trying pipe dope instead.
More likely, he's doing something wrong, like not making them up
tight enough.