Hello, I've just completed my first week burning with my Eko 25 and 500 gallons of pressurized storage. Everything for the most part is working as expected, and having storage has been a huge upgrade. The problem I am seeing is that as the temperature climbs, so is the pressure. I get that's what's supposed to happen, but I thought my expansion tank would absorb the pressure and keep things mostly consistent. I have an Extrol SX-90 expansion tank which I think should be more than enough for my application. I initially filled the system, purged the air, and then set the pressure to 12 psi. I shut off my automatic water fill because it kept wanting to go higher (it's set to 12-15 psi so maybe I should have let it keep going). The first couple of fires I kept small so I could keep an eye on things, and after working out some control settings, things worked great. The pressure did raise up to maybe 15 psi, but that wasn't too concerning at the time. My third fire was bigger and the temperature from the boiler got up to 185, and storage was only about 170. At this point, my pressure gauge got up to 25 psi. I didn't want it to go any higher so I opened all of the zones and my dump zone. I think I may need to replace some gaskets because the temperature in the boiler kept climbing slightly even with the fan off. I panicked a little bit and decided to relieve some pressure by letting air out of the expansion tank. I realize now that was stupid and will probably cause more problems. I'm trying to figure out why this is happening. I first suspected the expansion tank, but from what I've read on here, I think if no water comes out when I release some air, then it's still okay? I've tried feeling the tank to see if it is hot all over but honestly I don't feel heat anywhere in it. The pipe into it does get hot. Maybe with my model there is a shell around the actual tank. So, I know I need to add more air back into the expansion tank. I have a shut off above the tank and it's hooked up with a union, but I think there's probably a lot of water in it now and it is the lowest point in the system. Do I need to start to drain out my storage tank to release some pressure and then hook up my air compressor to push out the water? What other problems could be causing the pressure to raise so much? Thanks!