In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
Overhead boiler expansion tank
I came across this expansion tank yesterday. The circulator is on the return to the boiler, plugged into a wall outlet. The supply and return from the boiler go into this tank and the house supply and return come into the tank also. I am assuming the piping doesn't connect inside the tank. I am trying to figure out how to purge this system, there in no purge in the return from the house.