Traditionally, utility water systems at wastewater treatment plants are installed below ground or in a chlorine contact tank to allow the pumps to operate on a flooded suction. To reduce installation costs and make the utility water system easily accessible for inspection and maintenance, Gorman-Rupp self-priming pumps are installed above ground in a building or factory-built fiberglass enclosure.

Envirep recently started up a utility water system at a Maryland wastewater treatment plant with Gorman-Rupp Model 04A20-B self-priming centrifugal pumps. The system is designed to pump plant effluent water into a pressurized piping system that distributes the water throughout the WWTP to maintain a constant pressure over a wide range of flows. The pumps, when operating together, will deliver up to 1200 GPM and maintain a pressure of 125 PSI using a variable frequency drive and a PID control loop.

The utility water system draws water from the treated plant effluent downstream of the chlorine contact tank to provide disinfected water for yard hydrants, spray water, foam control, a biofilter odor control system, and various other uses throughout the WWTP.

The utility water pumps were installed as part of a plant upgrade project to meet Enhanced Nutrient Removal (ENR) requirements of 3.0 mg/l total nitrogen and 0.3 mg/l phosphorous.

Gorman-Rupp utility water systems are supplied as a complete package, including pumps, motors, discharge header piping, and control panel. They are fully integrated and factory-built on a common base for easy installation. Systems can be provided with variable frequency drives and/or hydropneumatic tanks as the application requires preventing short cycling of the motors and maintaining constant pressure in the distribution system. Manual or automatic in-line strainers can also be provided.

The UL-labeled control panel is complete with a stainless steel enclosure, circuit breakers, Allen Bradley VFDs and programmable logic controller, elapsed time meters, indicating lights, discharge pressure transducer, and alarms.

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Contact Envirep for information on Gorman-Rupp utility water systems.

By Mike Gillespie, P.E., President at Envirep

Envirep/TLC is the exclusive distributor for Gorman-Rupp municipal water and wastewater pumps and pumping systems in Eastern Pennsylvania, Delaware, Maryland, Northern Virginia, and the District of Columbia.

Gorman-Rupp’s extensive line of pump products includes self-priming centrifugal pumps, standard centrifugal pumps, submersible pumps, solids passing pumps, portable engine-driven pumps, and priming-assisted pumps. In addition, Gorman-Rupp manufactures a complete line of packaged wastewater pumping stations and potable water booster stations that include pumps, motors, controls, piping, accessories, and enclosures.

Gorman-Rupp is the industry leader and innovator in high-quality pump design. At Envirep/TLC, we will help you choose the best Gorman-Rupp^® pump parts for your needs. Our goal is to provide you with easy-to-operate, low-maintenance pump parts to ensure you are being as cost-effective as possible.

Envirep/TLC is an authorized distributor of Gorman-Rupp pump products, and we carry a huge inventory of spare parts, so our customers receive the best service possible.