Pump Design The pump(s) shall be automatically and firmly connected to the discharge connection, guided by no less than two guide bars extending from the top of the station to the discharge connection. There shall be no need for personnel to enter the wet well. A machined metal to metal watertight contact shall accomplish sealing of the pumping unit to the discharge connection. Each pump shall be fitted with sufficient length of stainless-steel chain with spectra cord to reach from bottom to top of wet well plus five feet of slack. The working load of the lifting system shall be 50 percent greater than the pump unit weight. Pump Construction Major pump components shall be of gray cast iron, ASTM A-48, Class 35B, with smooth surfaces devoid of blow-holes or other irregularities. All exposed nuts or bolts shall be AISI type 304 stainless steel construction. All metal surfaces coming into contact with the sewage, other than stainless steel or brass, shall be protected by a factory applied spray coating of acrylic dispersion zinc phosphate primer with a polyester resin paint finish on the exterior of the pump...
