RPZ Valve Testing in Derby

RPZ testing services in Derby

Derby's engineering and rail manufacturing base means many industrial sites rely on RPZ valves to protect mains water from process contamination.

Engineering works often run cat‑4 processes that demand RPZ isolation.

We test reduced pressure zone valves to confirm both check valves and the relief valve are operating within the required parameters, and we provide compliant documentation for your records. Testing is generally carried out annually, though the exact obligation depends on the installation, your water supplier and the relevant requirements that apply.

Typical Derby commercial properties we test

The testing process

1. 1

   We isolate the valve and connect calibrated test equipment.

2. 2

   Both check valves are tested for tightness and correct pressure.

3. 3

   The relief valve is tested for correct opening pressure.

4. 4

   We record results and provide compliant documentation.

5. 5

   If anything fails, we quote for the service or repair and re-test.

Why use Captain Backflow in Derby?