View Full Version : Expansion Tank Question

10-18-2009, 07:15 PM
I have a crown boiler that is about 8 years old model # ABF-175SPD. The expansion tank went but I'm not exactly sure what size tank I should buy to replace it. Does anybody have experience with this type of boiler?

Doherty Plumbing
10-18-2009, 08:09 PM
Your expansion tank isn't sized based on the boiler it's sized on the amount of water in the system. Your expansion tank should beable to absorb upto 4% of the volume of the system (give or take).

It's probably a 2 or 4 gallon expansion tank if this is a residential house.