RPZ Valves

RPZ valves also known as type BA Devices are mechanical devices that provide backflow protection against fluid category 4 which represents significant health risks.

• Installation - ‘Approved Installation Method AIM-08-01 Issue 2’ provided by Water Regs UK sets out the requirements for installation, on-site testing and maintenance.
• Annual Testing – NWL are required to monitor all RPZ valve installations in our water supply area. All valves must be tested and certificated on an annual basis. Copies of completed certificates must be submitted to waterregs@nwl.co.uk
  • Reporting an RPZ valve test failure

If the RPZ valve fails the compliance test but is repaired and satisfactorily retested immediately then the certificate should be forwarded to waterregs@nwl.co.uk as usual.

In the event of a test failure where an RPZ Valve cannot be repaired and satisfactorily retested immediately the tester shall notify the water undertaker within 24 hours to agree a course of action.

Contact details as below:

Monday to Friday 8am to 4pm - 0333 3214955 or

0333 3214956 (Water Regulations Dept) -

Email: waterregs@nwl.co.uk 

Friday 4pm - Monday 8am and Bank Holidays - 0345 717 1100 (Northumbrian Water Contact Centre). Details will be taken and advice given as to what action is required and if necessary you will be contacted by a Water Regulations Officer to advise further.

• We will give you advanced notification of the test due-date.
• Find out a full list of current Accredited RPZ valve testers in your area.