L.A County Trusts Singer's Anti-Cav Trim

At Pepperdine University, even the horses kicked up a fuss about how noisy a nearby valve was when it opened and closed. The horse stable stood next to a reservoir tank in the pressure zone at an elevation of 545 feet. The valve, which was at the tank’s inlet, was serviced by a high pressure line from 812 feet elevation. When opened, the valve would vibrate so drastically from the pressure drop that the nearby horses would react wildly.

“The valve vibrated so much it scared us—and the horses,” says Rick LaSance of Los Angeles County. “We were afraid it was out of control.”

Before long, the valve needed to be replaced. LaSance knew, however, that specifying the same valve would neither eliminate the noise nor stop cavitation.