Breen Plumbing Ltd.

‘Small enough to Care’
‘Big enough to Count’


Breen Plumbing has a team specialising in commercial plumbing, from new construction, renovations and upgrades. We provide sophisticated and creative solutions to commercial, retail and industrial plumbing challenges in the greater South Canterbury area.

Design Solutions

We provide a service and technology to design plumbing systems and solutions ranging from basic plumbing to more sophisticated.  We are happy to assist you and provide a modern plumbing solution for your commercial plumbing needs.

Design services include:

Hot and cold water supply and heating systems
Backflow prevention
Stormwater drainage
Foul water drainage
Specialist drainage systems
Gas supply systems
Solar water heating systems
Rain water collection

Backflow Prevention (IPQ)

Backflow is the unwanted reverse flow of water within a plumbing system that can result in contaminants being drawn into the water supply system.

The contaminated source can enter through a cross connection with the drinking water supply.  The water supply system is designed to ensure that water flows to you property under pressure, but if this pressure is not maintained, there is a chance that water could be drawn back into the supply system.

Causes of backflow
There are two basic causes of backflow.
1   A sudden drop in mains pressure causes the water to siphon back into the system.
2   The water supply is directly connected to equipment, such as a boiler or a private bore, which is at a higher pressure than the water supply system, forcing water into the supply system.

Backflow is prevented by installing a backflow prevention device such as a one way valve which prevents the contaminants from entering the potable water supply.  Breen Plumbing are specialists and are certified backflow prevention test specialists.  All backflow prevention devices have a required backflow test for certification every year. 

It is the property owner's responsibility to ensure that the correct boundary device is installed at their water connection(s).

What device do I install?
All water meters should have a device to prevent backflow, however the more dangerous the backflow the more complex the device that is needed.  Properties are classified into three degrees of risk and this will determine the type of backflow device required.

High Risk - sites are properties that use or produce products of a toxic or bacterial nature that may cause death or serious illness if leaked into the main water supply.  Eg:  chemical plants, cooling towers, air conditioners and hairdressing salons.
Backflow device:  reduced pressure backflow device (must be tested annually)

Medium Risk - sites can endanger health if backflow occurs.  Eg: public swimming pools and commercial laundries.
Backflow device:  double check valve backflow device (must be tested annually)

Low Risk - sites are properties that could cause a nuisance by colour, odour, or taste but do not endanger health.  Eg:  residential homes
Backflow device:  air gap separation or hose vacuum break valve (non testable)

Maintenance and Repair

We offer plumbing repairs as well as commercial plumbing preventive maintenance programs to keep you company functioning properly and respond quickly to any unforeseen system failures.

Copyright © 2009, Breen Plumbing Ltd.
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