American Standard Whirlpool Air Control Breaks Repeatedly
See the attached picture of my American Standard Whirlpool tub. Is anybody familiar with these? Boxed in blue are a couple air control valves to regulate the amount of air introduced to the jet flow. They are simple 1/4 turn valves. The problem is that the rubber seal within sticks sometimes (due to infrequent use). Then when someone grabs one to turn it, they have to apply force to overcome the stuck rubber seal. The problem is that the 1/4 turn motion is restricted by two small plastic nubs on the end of the valve. If the user doesn't know if the valve is currently turned full clockwise or full counterclockwise, they'll exert force thinking they have to overcome the sticky rubber seal. But in actuality, they are also turning the wrong way and shear off a nub (i.e., it's already full CCW and they are trying to turn it further CCW, unknowingly). American Standard's lifetime warranty is pretty good about just sending me a new valve assembly. But after doing this a couple times, I figure there has to be a better way. Last time, I tried lubricating the rubber seal with Vaseline. After a couple weeks though, it was back to the same problem, sticking. Now I'm about to replace another one, but want to know if anybody has a good idea about how to keep these rubber seals moving freely.