Why RPZ Valves Northern Ireland?

Welcome to RPZ Valves Northern Ireland. RPZ Valves Northern Ireland is a division of MPHS, Toomebridge which is a well known local company which carries out a wide range of plumbing and maintenance services.

In accordance with AIM-08-01 issued by the Water Regulations Advisory Scheme only a certified Tester is allowed to commission and test a Reduced Pressure Zone Valve (sometimes known as a BA Backflow Prevention device) which is where we come in.

Commissioning an RPZ Valve

Section 1.4 of the AIM-08-01 laid out by WRAS states;

Commissioning and testing of an RPZ Valve must only be carried out by an accredited tester approved by the Water Supplier as being competent to test.

Testing an RPZ Valve

All Variable Backflow Preventers must be tested upon fitting, which is required to be done by a Plumber who is both experienced and educated to Water Regulations Advisory Scheme standards.

The WRAS Regulations state that Water Suppliers and Authorised Organisations are the only one permitted to designate an Approved Contractor. At RPZ Valves Northern Ireland, we have met those requirements.

Where RPZ Valves are Required

A Reduced Pressure Zone valve is required in commercial premises that have a point of a Fluid Category 4 risk, that is one where there is a fluid in the water system that represents a significant health hazard due to a concentration of toxic substances.

This can be things such as Fire Sprinkler systems that include chemicals, Dishwashers for Caterers etc.

RPZ Valves NI is an Approved Contractor

With the implementation of RPZ Valves becoming a necessary step for commercial premises with a Fluid Category 4 risk, M.P.H.S foreseen the need for a Northern Ireland company who was qualified and specialised in the Commissioning, Testing and Installation of the valve

RPZ Valves NI also known as MPHS


Having been in business over 8 years M.P.H.S has served many customers, including but not limited to residential properties, commercial properties and industrial customers. A few have been kind enough over the years to leave us written words of thanks.

Good reliable honest Plumber who obviously knows what he’s about. Good value for the money paid!

Local Reliable Plumber

After my last boiler broke down I had to have my boiler replaced. MPHS provided a great service, Matthew arrived on time and performed very ...

Boiler Replacement

I recently had trouble with my boiler and M.P.H.S came out, outside of regular business hours to help. Matthew has done a fantastic job. Would ...

Happy Customer

Very pleased with the work M.P.H.S done to my boiler. As a result I find I don’t use as much on oil now since I had it fixed, my house is ...

Excellent Service

M.P.H.S carried out an installation of a downstairs toilet and washbasin. A lot of work carried out very efficiently, the work was also very tidy ...

Installation of toilet facility downstairs