Hayward HCP Pump HCP Series LITCPOMA10 - Page 15

7.5 PIPING - GENERAL System piping must be at least equal to size of pump connections. To prevent strain on the pump casing and foundation, pipe and fittings must be aligned to pump without forcing. To avoid strains on the pump, support both suction and discharge pipes independently. See section 5.3. Place these supports near the pump. To avoid a strain left by a gap at the last connection, start all piping at the pump and run pipe away from the pump. 7.6 PIPING - SUCTION Hazardous suction. Can trap hair or body parts, causing severe injury or death. Do not block suction. Risk of severe injury or drowning from hair or body entrapment. To reduce risk of entrapment against pump suction opening, connect pump to multiple drains and skimmers of non-entrapment design. NOTICE If pump suction becomes clogged, pump will cavitate, damaging pump internal parts. Keep suction pipe clear of debris, dirt, etc. NOTICE To prevent flooding when removing pump for service, all flooded suction systems must have valves in suction and discharge pipes. Use at least 4" (101 mm) pipe. Never use a suction pipe smaller than the pump suction connection. Use larger pipe as required to keep water velocity below six feet per second in suction lines and ten feet per second in discharge lines. If code requires a lower water velocity, comply with the code. Suction pipe must rise continuously from source to pump. To avoid air locking, do not allow high spots in pipe. When using reducer to connect to pump flange, use an eccentric reducer with the straight side on top. Figure 7.6 & 7.7 - Recommended Pump Section Layout. 15