The parking valve I received in the kit had the wrong threads for the fittings, so I bought a couple of different valves to replace it. One was the same size as the original but was rated at 270 psi. Break pressure on the cylinder is estimated at 400-600 psi, so I installed a stainless steel valve that was rated at 900 psi. It was a little bigger, but after a few adjustments, it fit fine.
