Tried searching for an answer to this, but came up empty.
House is 37 years old. The shower valve is a Moen pull and turn. I'm fairly certain that this valve is original to the house. How long do these valves last? I don't see any leaks, but would like to be proactive and prevent any leaks by replacing the cartridge. If that's not necessary, I won't bother. I can't find a part number anywhere, so I don't even know if replacement cartridges for this model are available, but I would think that they are given that this is a developer special and probably in a bazillion homes.
Thanks.