Slow-Release Valve This Slow-Release Valve (S.R.V.) goes between the wheel air valve & a valve ext. serving as a safeguard in the event a valve extension fails. The S.R.V. will only let 10psi/15min escape. Call for more information.   Copyright © 2011 RealWheels Corporation. All rights reserved.  Terms, Conditions and Warranty  |  Patents  |   Follow RealWheels on Twitter Website Created by GS Marketing Group, Inc.