Franklin Electric 4 in E-Series Environmental Submersible Pump - 2-Wire, 10-20 GPM

Franklin’s E-Series is a 4 in submersible effluent pump for filtered effluent service, aeration, and ornamental fountains and waterfalls. The water path through the discharge is designed to pass particulate, so the pump keeps running efficiently in effluent duty.

The 10 and 20 GPM units run on a shaft bearing with built-in dry-run protection and carry a removable built-in check valve; the high-flow 35 to 90 GPM units use a ceramic sleeve bearing and have no built-in check valve.

• Ideal for effluent pumping applications: filtered effluent service, aeration, ornamental fountains and waterfalls
• Stainless steel or thermoplastic discharge and motor bracket, tough and non-corrosive, highly resistant to damage by minerals, metals and other substances typically found in water
• Heavy-duty, 300 V, 10 ft SJOOW motor leads
• 10 and 20 GPM units are equipped with a highly engineered shaft bearing with built-in dry-run protection
• High-flow 35 to 90 GPM units are built with a proven and durable ceramic sleeve bearing

Find your horsepower in the row, then read across. Total head is the lift from the pumping water level, plus the pressure you want at the tank (2.31 ft for every PSI), plus friction in the drop pipe. The output tables give the flow you get at a 30/50 PSI pressure switch for your depth to water.

10 GPM class — total head in feet at three flows

20 GPM class — total head in feet at three flows

Total head read from the published curves in Franklin’s FPS Residential Submersible Catalog (MF5060), pp. 67 and 69, digitized and rounded down to whole feet, at the plotted flows nearest 20%, 50% and 75% of where the curves end. 0 GPM is Franklin’s printed shut-off. Feet of head = PSI × 2.31.

Output in GPM at 30 PSI (switch cut-in), by depth to water

Output in GPM at 50 PSI (switch cut-out), by depth to water

Output tables as printed in MF5060, pp. 68 and 70, at the 30 and 50 PSI rows; Franklin rounds them to whole GPM. Drop-pipe friction is not included (manufacturer note). — marks a point Franklin does not print.

Best operating range: Franklin shades the best-efficiency range on each published curve and prints no figures for it. The curves are in the image gallery.

• Maximum diameter across the cable guard is 3.90 in on all models
• Discharge: 1-1/4 in NPT (10 and 20 GPM); 2 in NPT (35 to 90 GPM)

• Set the pump at least 5 ft off the bottom of the well and above the well screen or casing perforations.
• Use positive-sealing check valves only, never swing type: one in-line within 25 ft of the pump below drawdown, and one every 100 ft of setting beyond 100 ft.
• Install a separate lightning arrestor close to the wellhead.

From the Franklin 4 in Environmental E-Series pumps owner’s manual (106259101).