Clean Water Starts Here...
Clean WaterStarts Here...

Partnering With You to Keep Our Drinking Water Safe

Since 1998, Certified Testing Services has partnered with the property owners of Southwest Washington to meet State requirements for annual backflow preventer testing. Through annual testing we discover and eliminate potential backflow issues that can contaminate and pollute our drinking water.


Most residential backflow devices are installed on Sprinkler/Irrigation systems. Without a functioning backflow preventer the public water system is vulnerable to backflow of:

  • Chemicals
  • Pestisides/Round-Up
  • Lawn Ferrtilizerr
  • Greywater Runoff

As well as other potentially harmful contaminates.


To learn more about backflow prevention go to our Backflow 101 page or click below to schedule your  annual test. For current  pricing click here for our Test Scheduling Page



Most commercial buildings have at least one testable backflow preventer. Often it is found on the building fire suppression system but backflow devices can be required to prevent other hazards.  For example:

  • Restaurants
  • Car Wash
  • Medical/Dental Offices
  • Dry Cleaners
  • Multi-Unit Retail Space
  • Manufacturing Facilities
  • Irrigation/Sprinkler System
  • Fire Sprinklers

Any time a cross connection is made to the public water supply a backflow preventer should be present and tested annually. Pricing For Commercial Backflow Testing and/or confined space Fire Sprinkler vaults quoted on a per-job basis. Go to our Test Scheduling Page to request pricing.


Fire Suppression Sprinklers

Homeowners have heard a thousand times from neighbors, friends, and television news reports that they should NEVER USE AN UNLICENSED CONTRACTOR!!  Most of us wouldn't even consider it no matter how attractive the price.


What you may be surprised to learn is that the State of Washington only requires a certified backflow (BAT#} certificate to test a device. Even companies on the list you received from your water company do not require a contractors license, workers comp coverage, or even basic liability! 


As a Washington licensed contractor (#CERTITS797M7} you can feel secure that the tester on your property is not just backflow certified, but also fully licensed, bonded, and insured.  



For more information or to schedule a test by phone please call:


(360) 600-3273 (office)


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