[rohrmann]

We have the TST 507 flow through system. Left the temp setting at the default temp setting. Set the pressure setting to alarm below 100 psi, as we have the G614's. We have the metal stems, and bought the booster at the time as the system. If you have no leaks, you will still see a wide pressure range when changing from summer temps to winter temps. I don't worry, as long as the pressure in the morning is close to 100 psi.