Aquastar 125 leak

[JodyLyne]

I just did a descale on my Aquastar 125blp tankless water heater. After cleaning the inlet water filter, I reconnected the inlet line using the old gasket. It leaks a lot. Wondering if an old gasket could cause a major leak like that or if I torqued the connection too much and damaged the water valve housing. Anyone have thoughts on this?

 

[Terry]

Often old gaskets will leak. I never plan on reusing them.

You should have something like this for your tankless.
https://www.brasscraft.com/product/...ve-kit-with-pressure-relief-valve-200-kbtuhr/