It has nothing to do with the EPDM tubing, even if it happened to be the case that the tubing was failing.
The things that cause pressure to rise over time (not temperature) are seepage at the pressure reducging valve, or leaks from the heat exchanger inside the water heater. If either of those is the problem, with isolaing valves it's possible to sort out which is the culprit.
The things that cause excessive pressure rise with temperature are undersized expansion tank, or improperly charged expansion tank. To deal with that:
Try pumping air into the tank until the air pressure reads 15-20 psi. The water pressure on the system should rise accordingly. Bleed the water pressure back down to 12 psi, then test the air pressure with a tire gauge. If it's 12 psi, pump it back up to 15-20 psi. If the system pressure doesn't change, bleed the air back down to 15 psi. If the system pressure rises, bleed water out of the system until it hits 12 psi. Repeat. When pumping air into the tank no longer changes the system pressure, it will have the maximum possible expansion room- so bleed air until the air pressure down to about 1-2 psi above the (cold) system pressure.
It has nothing to do with the EPDM tubing, even if it happened to be the case that the tubing was failing.
The things that cause pressure to rise over time (not temperature) are seepage at the pressure reducging valve, or leaks from the heat exchanger inside the water heater. If either of those is the problem, with isolaing valves it's possible to sort out which is the culprit.
The things that cause excessive pressure rise with temperature are undersized expansion tank, or improperly charged expansion tank. To deal with that:
Try pumping air into the tank until the air pressure reads 15-20 psi. The water pressure on the system should rise accordingly. Bleed the water pressure back down to 12 psi,
then test the air pressure with a tire gauge. If it's 12 psi, pump it back up to 15-20 psi. If the system pressure doesn't change, bleed the air back down to 15 psi. If the system pressure rises, bleed water out of the system until it hits 12 psi. Repeat. When pumping air into the tank no longer changes the system pressure, it will have the maximum possible expansion room- so bleed air until the air pressure down to about 1-2 psi above the (cold) system pressure.[/QUOTE][/QUOTE]
I am beginning to think that the expansion tank is to small. Also, I think the tridicator gauge is off 10 pounds on the pressure side. I am going to drain the boiler, replace the gauge and switch the #30 tank for a #60 tank when I get a kit for the spirovent. I would like to get a new circulation pump to have on hand, but can’t seem to find the same one. Taco model 0011-f2