Washington Administrative Code › Title 51 - Enterprise Services, Department of (Building Code Council) › Chapter 51-56 - State Building Code adoption and amendment of the 2021 edition of the Uniform Plumbing Code › Section 51-56-0600 - Chapter 6-Water supply and distribution

Current through Register Vol. 24-14, July 15, 2024
601.1
Applicability.
This chapter shall govern the materials, design and
			 installation of
water supply systems
, including backflow
			 prevention devices, assemblies and methods used for backflow
			 prevention.
603.1
General.
Cross-connection control shall be provided in accordance
			 with the provisions of this chapter. Devices or assemblies for protection of
			 the public water system must be models approved by the department of health
			 under WAC
			 246-290-490. The authority having
			 jurisdiction shall coordinate with the local water purveyor where applicable in
			 all matters concerning cross-connection control within the property lines of
			 the premises.
No person shall install any water operated equipment or
				mechanism, or use any water treating chemical or substance, if it is found that
				such equipment, mechanism, chemical or substance may cause pollution or
				contamination of the domestic water supply. Such equipment or mechanism may be
				permitted only when equipped with an approved back-flow prevention device or
				assembly.
603.2
Approval of Devices or Assemblies.
Before any device or assembly
			 is installed for the prevention of backflow, it shall have first been approved
			 by the authority having jurisdiction. Devices or assemblies shall be tested for
			 conformity with recognized standards or other standards acceptable to the
			 authority having jurisdiction. Backflow prevention devices and assemblies shall
			 comply with Table 603.2, except for specific applications and provisions as
			 stated in Section 603.5.1 through 603.5.21.
All devices or assemblies installed in a potable water supply
				system for protection against backflow shall be maintained in good working
				condition by the person or persons having control of such devices or
				assemblies. Such devices or assemblies shall be tested in accordance with
				Section 603.4.2 and WAC
				246-290-490. If found to be
				defective or inoperative, the device or assembly shall be replaced or repaired.
				No device or assembly shall be removed from use or relocated or other device or
				assembly substituted, without the approval of the authority having
				jurisdiction.
Testing shall be performed by a Washington state department of
				health certified backflow assembly tester.
TABLE 603.2
Backflow Prevention Devices, Assemblies and
				Methods
The following line is deleted from the
				table:
Device, Assembly or Method
Applicable Standards
Pollution (Low Hazard)
Contamination (High Hazard)
Installation
Back Siphonage
Back Pressure
Back Siphonage
Back Pressure
Backflow preventer for carbonated beverage dispensers
						  (two independent check valves with a vent to the atmosphere.)
ASSE 1022
X
Installation includes carbonated beverage machines or
						  dispensers. These devices operate under intermittent or continuous pressure
						  conditions.
603.4.2
Testing.
For devices and assemblies other than those regulated by
			 the Washington department of health in conjunction with the local water
			 purveyor for the protection of public water systems, the authority having
			 jurisdiction shall ensure that the premise owner or responsible person shall
			 have the backflow prevention assembly tested by a Washington state department
			 of health certified backflow assembly tester:
(1) At the time of installation, repair or
			 relocation; and
(2) At least on an
			 annual schedule thereafter, unless more frequent testing is required by the
			 authority having jurisdiction.