Floor Drain Check Valve Menards

October 25, 2022

Department Of Health

Clearances All double check valve (DCV) and reduced pressure zone (RPZ) backflow preventer assemblies are designed for in-line service and must be installed to prevent freezing, flooding and mechanical damage with a clearance sufficient to facilitate maintenance and testing. Adequate clearances from floors, ceilings and walls must be provided to access test valves and to allow repair and/or removal of relief valve and check valves; as follows: All assemblies must be installed with a centerline height of 30 inches to 60 inches above the floor. Drainage Drainage for backflow prevention assemblies must be provided for all DCV or RPZ installations to allow relief during testing or draining of the unit and for reliefs from the RPZ relief valve, as follows: For RPZ devices, the drainage capacity must be sized to accommodate the two intermittent discharges. and catastrophic failure of the relief valve. Refer to manufacturers flow curves to determine maximum discharge rate based on supply pressure or site pressure; whoever is the greatest. Refer to manufacturers flow curves to determine maximum discharge rate based on supply pressure or site pressure; whoever is the greatest. However, where pit installations are proposed, they should be designed: To be watertight with watertight manholes or access doors extending at least 6 inches above ground level and located so as to allow natural light to enter the pit during testing/maintenance. Above grade installations should be provided with adequate clearances and the discharge may be directed to the ground or drains or through a side wall above grade via screen louvers, scuppers, pipe sleeves with valves, etc., in accordance with drainage requirements. Submission and approval of plans In accordance with section 10 of the Cross Connection Control manual, the submission of plans and specifications for the installation of backflow preventers must include the following elements: A site plan (to scale or with dimensions) of the facility containing a general map of the location, name and address of the facility, property lines, buildings, size and location of public water mains and of all domestic fire and water services, water wells, fire piping and hydrants, pump connections, interconnections, and location of proposed backflow preventer(s). A plumbing floor plan (plan view) or partial floor plan showing water services, facility name and address, water meter layout, backflow preventer(s) proposed, the booster pump system, floor drain(s) and any nearby objects (examples: panels, boilers, chillers, storage tanks, fire pumps, fire sprinkler risers, etc.). Manual M-14 Service Class Sprinkler; Description of proposed backflow preventer installation - indicate location of backflow preventer, drainage, lighting, heating, access to unit, floor level square footage where the backflow preventer must be located; Description of the existing or proposed booster pump system, answering the following questions: After installation of the proposed backflow preventer(s), the Net Positive Suction Head (NPSH) required for proper operation of the booster pump system will it be adequate?