I purchased the entire manifold rather than a single replacement valve. Prompt delivery! I swapped out the bad valve with one from the manifold. Pretty straightforward if you are somewhat mechanically inclined. Took an hour or so, but much of that time was spent cleaning parts while they were disassembled. The manifold has 4 more valves should any others fail. Cheaper and faster than had I called the repairman and set up an appointment (with their 4 hr arrival window).