Backflow Preventer and Certification Services
Servicing the Milwaukee – Waukesha – Lake Country Areas
Backflow – What Is It?
Back flow is the reversal of unwanted water from a possible source of contamination into the clean public water supply. There are two types of backflow:
- Back Pressure – When a system is at a higher pressure than the public water supply and unwanted fluid can be pushed back into public water supply.
- Backsiphonage – When the water supply has reduced, or negative pressure, which allows contaminated substances to be ‘drawn’ into the public water supply.
How Backflow Can Be Prevented?
Inserting devices ensuring water will pass through in only one direction stops backflow. That is where the simple term backflow preventer originates. Backflow preventer types are –
- Reduced Pressure Backflow Preventer – a reduced pressure backflow preventer is used to protect water supplies from contamination by controlling the pressure and directing water flow.
- Non-Return Valve – a properly fitted non-return valve ensure water flows in a preferred direction where pressure conditions may otherwise cause a reversed flow.
Why Test a Backflow Preventer?
A backflow preventer has an internal seal, springs and many moving parts. Like any tool with moving parts, the parts wear out and will eventually fail. A backflow preventer can also be bypassed.
For these reasons, backflow preventer testing is needed to validate proper functioning to protect the public water supply. Sometimes a visual review will suffice, however, all mechanical backflow preventers require testing with specialized, properly calibrated equipment. Schoenwalder Plumbing is a backflow preventer expert and can perform all related tests, installations and repairs need to keep you in code.
Email us, or call (262) 542-7908.