Redwood Backflow Call (425) 495-1939Call

Tested. Tagged.Reported.

Backflow assembly testing and repair for homes and businesses across most of King and Snohomish counties, seven days a week.

Call (425) 495-1939

Weekend testing and repair at no additional charge, per the shop.

From test to report.

  1. First, the test.

    Backflow assembly testing and repair, residential and commercial.

  2. Then, the tag.

    A laminated, date-punched tag goes on the assembly.

  3. Within one day, the report.

    Emailed or faxed to your water district. The shop’s own description of its process.

The shop also offers an optional annual maintenance program, per the shop.

Water districts we report to.

  • Bellevue
  • Bothell
  • Issaquah
  • Kirkland
  • Redmond
  • Renton
  • Shoreline
  • and others

Districts listed on the shop’s services page include these. The shop’s list is longer, so call to confirm yours.

Detail of a 1950 USGS topographic map of the Redmond area, showing Lake Sammamish in green and blue.
Redmond and Lake Sammamish, USGS topographic map, 1950.

Redwood Backflow, Redmond.

Redwood Backflow tests and repairs backflow assemblies in Redmond, Washington, for homes and businesses across most of King and Snohomish counties. The shop names Jack Allenfort as its owner. After a test, a laminated, date-punched tag goes on the assembly and the report is emailed or faxed to the water district within one day, in the shop’s words.

The shop is open 7:00 am to 6:00 PM PST, seven days a week, and says weekend testing and repair come at no additional charge. Washington’s public contractor record lists an active plumbing contractor license with a backflow specialty, checked 2026-10-26.

Call (425) 495-1939 to book a test.

Aerial view of downtown Redmond, Washington.
Downtown Redmond, from the air.
Aerial view of the Cedar River flowing into Lake Washington at Renton.
The Cedar River meets Lake Washington at Renton.
Aerial view of Lake Sammamish State Park near Redmond, Washington.
Lake Sammamish State Park, near Redmond, from the air.

Call to schedule a backflow test. Open seven days a week.