New Wilkins 375AST with Trash in it.
Each time We come across these, we always get lots of practice. It seems that the first time taking it apart and cleaning and flushing the assembly is never quite good enough. We usually get a couple of times to take off the cover and at least one time at the relief valve. Having said that, We really like this assembly. After working on this assembly, be very careful to get the cover on correctly. The best way if you are not familiar with it is to take photos from beginning to end to ensure you get the cover on right. Don’t be alarmed if when you are opening the first shut off valve to put water through the assembly for the first time, you hear a loud pop. That sound is normal. Enjoy the Pictures.