Willamette Valley Backflow offers quality backflow testing with a commitment to the health of Oregon Water Distribution Systems and the customers that share the responsibility to keep these systems safe for everyone. Willamette Valley Backflow is conveniently located in the heart of the Willamette Valley, so we can easily travel to your location, keep our costs low, and pass savings on to our customers.


Offering Backflow Assembly Testing in the Greater Willamette Valley, Oregon

What is a cross connection?
A cross connection is a link or structural arrangement where potable water in a distribution system can be exposed to unwanted contaminants. It is the point at which it is possible for a non-potable substance to come in contact with the drinking water system. Cross connections are generally unintentional and can happen anywhere pipes supply water.

What is a backflow?
Backflow is the reverse flow of undesirable materials and contaminants into the water mains. Backflow can happen because of two conditions: backpressure and backsiphonage. 

Backpressure occurs when pressure in a pipe connected to a main pipe in the distribution system becomes greater than the pressure in the main pipe itself. When this happens, a net force acts on the volume of liquid in the connecting pipe, allowing unwanted material to enter the main pipe. 

Backsiphonage refers to a situation where the pressure in a service pipe is less than the atmospheric pressure. If water in a supply line is turned off, such as when a pump fails, backsiphonage can cause contamination to be sucked into the system due to a vacuum in the service line. 

If a cross connection exists in a system, it does not mean that there will be a backflow every time. But, where cross connections exist, there is always the possibility.

Oregon LCB# 8935
Licensed, Bonded, Insured

Communities we test in.


Mt. Angel