Backflow prevention assemblies approved for installation in Washington State.
Contributors: Washington (State). Office of Environmental Health Programs.; Washington (State). Office of Drinking Water.
Publisher: Washington State Dept. of Health, Division of Environmental Health, Office of Drinking Water
Published: 2004
Place of publication: Olympia, WA
Language: eng
Number of pages: 56
Subjects: Cross-connections (Plumbing); Water-supply engineering -- Washington (State); Backsiphonage (Plumbing) -- Prevention -- Washington (State)
Notes: "March 2004."

"DOH Pub. #: 331-137. (Rev. 3/04)."