An old Richdel antisiphon valve leaks. Might be the diaphragm since it's more than 10 years old and our water out here is quite heavily chlorinated. Tried turning on/off, no help. Anyhow, I can't totally shut the water off to that valve since the turn-off is right at the meter and those old things never fully close. So I have to buy a new diaphragm before I take it apart because I am afraid it'll fall apart on me. Then it would be me frantically driving around and water constantly oozing.
Do the usual repair kits or replacement diaphragms from Ace or TrueValue generally fit into old Richdel valves? I heard that LawnGenie and Richdel are somewhat compatible.