Anton Let By/Tightness & Pressure Valve A time saving accessory designed to simplify let by & tightness testing by allowing the engineer to get the desired gas pressure on their U Gauge or Pressure Meter without having to keep pulling off the hose and making repeated adjustments. The APRV includes a simple thumb relief valve with o ring seal, a 1 metre long good quality pressure hose and a push-fit T piece so that the hose length can be easily adjusted to suit your needs. Supplied with: Push fit T piece, so hose length can easily be changed to suit 1 metre good quality pressure hose Simple thumb relief valve with o ring seal Don’t forget once you have purchased and received your product, leave a ""Customer Review"" and share your thoughts with others