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WARNING! Irrigation systems supplied by domestic or private potable water systems are considered to be a potential pollution hazard to the water supply. These systems must include protection to prevent possible backflow of irrigation water into the potable water supply. Federal law requires a proper backflow device to be installed on any watering system to prevent contamination of the supply; whether it be pump or city water. Check your local water authority for installation requirements & codes. In many rural areas; specific requirements for landscape irrigation systems may not be covered in local plumbing codes and/or enforcement may be limited. HOWEVER...limitation in local authority does not alter the basic requirement for protection of the potable water supply.
40-100 Series Double Check - Sizes 1/2" to 2": Bronze body double check valves with Celcon® poppets and stainless steel springs. Sizes 2 1/2" to 10": Fusion epoxy coated ductile iron body; 85-5-5-5 replaceable seats and stainless steel springs. Full USC-FCCCHR; AWWA; ASSE; CSA; IAPMO approvals. UL classified and FM approved; models 2 1/2" to 10". Top entry double check valves also available; both first and second check valves designed at inclined angle upward from horizontal assembly. Easy installation; repair and maintenance. Maximum working pressure: 175 PSI; temperatures: 33° to 180°F. Sizes: 3/4" to 2".
All non-health hazard (nontoxic) connections including: irrigation systems; fire sprinkler systems; in-plant commercial and industrial plumbing.
Double check assemblies are not approved for backflow prevention of any toxic substance (liquid; solid; or gas).
A double check assembly consists of two spring loaded check valves; shut off valves on the inlet and discharge side of the check valves and small test cocks. Check valves allow water to flow in one direction only. A 12 inch minimum clearance is recommended under the assembly.
