Hayward HCP Pump HCP Series LITCPOMA10 - Page 14

PUMP SUCTION REQUIREMENTS 7. Pump Suction Requirements Pump suction is hazardous and can trap and drown or disembowel bathers. Do not use or allow anyone else to use a pool, spa, or hot tub unless it has at least two suction outlets to each pump suction line (see "Outlets Per Pump," section 7.3). Do not use or operate swimming pools, spas, or hot tubs if a suction outlet cover is missing, broken, or loose. Follow the guidelines below for a pump installation which minimizes risk to users of pools, spas, and hot tubs. 7.1 ENTRAPMENT PROTECTION The pump suction system must provide protection against the hazard of suction entrapment or hair entrapment/entanglement. 7.2 SUCTION OUTLET COVERS All suction outlet covers must be maintained. They must be replaced if cracked, broken, or missing. See page 15 for outlet cover certification requirements. All suction outlets must have correctly installed, screw-fastened covers in place. 7.3 OUTLETS PER PUMP Provide at least two hydraulically balanced main drains, with covers (see fig. 7.6 & 7.7, page 15), for each swimming pool pump suction line. The centers of the main drains (suction fittings) must be at least three feet apart. The system must be built so that it cannot operate with the pump drawing water from only one main drain (that is, there must be at least two main drains connected to the pump whenever it is running, see fig. 7.6 & 7.7). However, if two main drains run into a single suction line, the single suction line may be equipped with a valve which will shutoff both main drains from the pump. More than one pump can be connected to a single suction line as long as the requirements above are met. 7.4 WATER VELOCITY AND FLOW RATES The maximum water velocity must be six feet per second or less unless the outlet complies with the latest ASME/ANSI Specification for Suction Fittings For Use in Swimming Pools, Spas, Hot Tubs, and Whirlpool Bathtub Applications. If 100% of the pump's flow comes from the main drain system, the maximum water velocity in the pump suction hydraulic system must be six feet per second or less even if one main drain (suction fitting) is completely blocked. The flow through the remaining main drain(s) must comply with the latest ASME/ANSI Specification for Suction Fittings For Use in Swimming Pools, Spas, Hot Tubs, and Whirlpool Bathtub Applications. 14