Product review (5 stars): Good Part
Much cheaper than other alternatives, and it works perfectly.  It is functional and quiet.  I wish I didn't have to cut the ends off the original compression sealed hoses, but no real reason why - the newer type o-ring seals work fine.  My original valves were leaking a bit - took them apart and found the rubber seals were rock hard after 15 years; rust below them showed the leak had been going on for long time!.  I hoped to find just a seal kit, but not available.  Replacing the whole valve assembly was easy and worked fine (and probably more reliable).