While I was working on rebuilding my Zurn Wilkins 600XL 1" Water Pressure Regulator Valve I broke x3 of the x4 sets of Cap Gasket seals that I had (don't ask me the sequence of events that led to me posessing x4 sets of Cap Gaskets...)
They seem to be some kind of cardboard material, and apparently they are 'one time use'.
Once you tighten the cap, and they get moist, and make seal up with the brass body, they break if you loosen the caps again.
I called Zurn Wilkins, but they don't sell those seals individually, only in the rebuild kits that cost $50 which I had already bought. I didn't want to buy a whole other kit just for those seals.
So I went searching to various hardware stores for suitable alternatives.
One promising option that I found was a sheet of blank rubber seal material that I could cut out to appropriate diameters
but that turned out to not be a solution.
Does anyone know where I can find replacement cap gaskets for the Zurn Wilkins 600XL 1" Pressure Regulator?