On Sat, 18 Mar 2017 09:27:07 -0400, Ed Pawlowski wrote:

On 3/18/2017 8:22 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.


Step 1: Install a Pressure Reducer. No reason to be above 60 or so
PSI. Most are about 50 PSI

The leaks are not due to pressure, a proper joint can easily handle it.
Make sure the connections are clean, no dents or dings, tape is wrapped
properly.
And NEVER use "compression fittings" - you know, the ones with the
brass "olive" that gets cranked onto the pipe by turning the
compression nut. They WILL seepwhen used on hard copper lines - almost
guaranteed. You might never see a drip, but months later the
connection is all green.