“We have a Bosch combi furnace that heats the house and the hot water. Alas the hot water temperature on startup (set to 120 degrees) was up to 150 degrees F which is risk for scalding and probably relates to the unit heating the house. Although it did settle down to the set 120 degrees, the plumber felt the only solution was a temp controlled mixing valve ($800 to install). I installed the unit with SharkBite fittings (the slip connection on the cold water pipe worked but was a bit of a challenge to make it slip!).There does seem to be a rubber seal missing for the top union.It worked right away and works perfectly. For those considering a Combi house/water heater it is probably best to install an anti-scald valve with the furnace installation.”
“Had the cash acme non-pro version for 4.5 years. Replaced water heater yesterday and installed new pro version with temp gauge. The old model Tee was soft brass and I bent it trying to remove the threaded copper outlet tailpiece so as to install on new heater so could not reuse. The old one worked great last 4.5 years. The new one is awesome. The braided hose is extremely thick and stiff, seems high quality. Reminder to be sure hot water is running through a faucet when adjusting the temperature setting. Mixing valve is a must have for these water heaters. Worth every penny. Can't speak to the longevity of the new pro model, but the non pro lasted the whole time I had it. The rubber washers however did show signs of deteriorating and the metal screens were rusted and had significant corrosion and scale. Likely should remove this product around 5 years and replace screens, rubber washers and the main hose, and that is only if removed without damaging the brass parts.”
