I have a Raypak C-R336A-EN-X ASME heater on my 30k gallon IGP. This is a Raypak Digital 336, ASME, commercial with Cupro-Nickel Heat Exc. I've only owned the pool for 2 seasons so I don't know the age of the heater. I had a slow leak at the outlet joint at the end of the swim season and I...