Prince William Water is responsible for maintaining records on testable backflow prevention devices connected to the public water distribution system, enforcing state laws regarding proper installation/maintenance and sending out annual notices to property owners/responsible parties with testable backflow devices due for re-certification.

Backflow preventiondevice bidet

Each cross connection must be eliminated or properly protected by an approved backflow preventer. All work done on the internal plumbing system of your facility must be performed by a state-licensed plumber. Any changes to your plumbing must be approved by your local plumbing inspector. At the top of this page is a digital, fillable copy of our Backflow Device Test Report, to be used by the Certified Backflow Device Tester performing the testing when submitting results to Prince William Water.

Backflow preventionstandards

The typical cost of a backflow preventer will vary in price depending on the size and type of assembly required. Since a backflow preventer may be the only barrier between your customers and contaminated water, investing in, installing and keeping the equipment maintained is minimal compared to the potential liability of a backflow incident.

Helpful resources and information for our customers, including billing and payment options, our Customer Satisfaction Survey, and wise water use tips.

Backflow preventiondevice cost

Non-potable water or chemicals used in equipment can end up in the potable water system as a result of backpressure or back-siphonage.

You are responsible for all unprotected or inadequately protected cross connections on your premises and liable for any damages or illnesses they may cause. In cases where business owners have been proven at fault for cross connection contamination events, judges and juries have awarded plaintiffs substantial monetary damages.

A cross connection exists anywhere the potable water piping system is directly or indirectly linked with a piece of equipment or piping that could possibly pollute or contaminate the potable water supply.

This October, team up with Prince William Water and Prince William Public Libraries for our "Imagine a Day Without Water" challenge. Register on Beanstack from October 14th to October 31st to access educational activities, learn how crucial water is to our daily lives and get a chance to win prize!

Backflow preventionValve

Backflow preventiondevice Bunnings

Our newsletter includes upcoming events, water safety tips, and important updates about our services. We also alert customers about water supply or quality, so you can stay informed and take any necessary precautions.

Helpful resources and information for our customers, including billing and payment options, our Customer Satisfaction Survey, and wise water use tips.

Backflow preventionTest Kit

Backflow preventiontesting

Any unprotected or inadequately protected cross connection on your premises could contaminate the potable water supply for your customers, employees and even neighboring homes and businesses. Severe illnesses have resulted from cross connection contamination events that could have been easily prevented.

Backpressure occurs when the pressure in the equipment or system, such as a boiler or air conditioning unit, is greater than the pressure inside the potable water line.

Back-siphonage can happen when the pressure in a potable water line drops due to occurrences such as main breaks, nearby firefighting or unusually heavy water demand. When the pressure drops, contaminants can be siphoned out of the non-potable system into potable water lines.