Commercial & strata · 24/7
RPZ valves. Tested and working.
A reduced pressure zone valve is the highest level of backflow protection. It needs regular testing to keep doing its job.
- Answering 24/7
- 15 fully-equipped trucks
- Licensed · Lic 227021C

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Call nowWhat it is
RPZ valve testing & replacement, explained.
An RPZ valve is a backflow device used where the risk of contamination is high, such as factories, hospitals, labs and some commercial kitchens. It has two check valves and a relief valve that dumps water if pressure goes the wrong way.
We test RPZ valves, rebuild them with service kits, and replace units that have worn out.
Signs you need us
Signs you need us.
- Water dischargingthe relief valve dripping or dumping water.
- A test reminderthe annual test is due.
- An old unitfailing tests or parts no longer available.
- A new high-risk connectionthat needs an RPZ fitted.
How we fix it
Four steps. Start to finish.
Step 1
We inspect the valve
and its isolation valves and strainer.
Step 2
We test it
each check valve and the relief valve.
Step 3
We service or replace
a rebuild kit or a new unit.
Step 4
We retest and report
so you have the record.
Why CityWide.
- Since 2002Local plumbers for over two decades.
- 15 trucksFully-equipped trucks, stocked with parts and tools.
- ISO certifiedISO 9001, 45001 and 14001 — quality, safety and the environment.
- Lic 227021CLicensed plumbers, drainers and gasfitters.
FAQs
Common questions.
Why is my RPZ valve dumping water?
Usually debris in a check valve or a pressure change in the main. We test it to find out.
Can it be serviced instead of replaced?
Often, yes. Most RPZs can be rebuilt with a service kit.
Will the water be off while you work?
For a short time. We can plan the work to suit your site.