Hello everyone. New member here, but I won't be a "one & done". Going to be doing a lot of work on my house, so I'll be in and out for a long time. I have a quick shower faucet question. I bought my house 3 years ago, but it was built in 1982 (in New Hampshire). Recently, the shower faucet refused to go all the way back in. So, I tried taking the cartridge out. It was really, really stuck in there. Finally, after some vinegar and liquid wrench, I got it out. I need to replace it, but when I brought it to Lowes, they didn't have anything remotely like it. It's not a stem sliding in a body type (can't get that lucky). It's a single piece of brass that's hollow and has strategically located holes with screens to align with the feed pipe entries inside the valve itself. I have no idea who makes this thing. It wasn't on the knob or the estuchion. Nor is there anything written on the valve. I believe the valve is brass. The feed lines are offset about 1.5 inches from the vertical run to the shower. It has two screw heads in line on the entries that look like they might shut the feed off. Any suggestions? Thanks.