A. PVC Air Vacuum Release Valve 25mm closes and seals under 35 kPa (Red Top)
5 stars -
"Review for A. PVC Air Vacuum Release Valve 25mm closes and seals under 35 kPa (Red Top)" Dale CarterThis A. PVC Air Vacuum Release Valve 25mm closes and seals under 35 kPa (Red Top) is the best Relief Valves I have tried.