Pentair Dominator 230v 4″ Inch Well Pump – 115/57M

Description

The Pentair Dominator 4″ 115/57 M (code 320-0030) is a 230v single-phase multistage submersible pump for clean water in 4-inch wells and boreholes. Eight stages driven by a 0.8 kW motor give a maximum head of 57 metres, with 52 metres at 20 litres per minute, 44.4 metres at 40 l/min and 16.6 metres at 80 l/min. It draws 5 A and delivers through a 1¼” outlet.

The whole Dominator 4″ range, including the 55/50 and 75/56, is no longer available. For a 4-inch bore, see the Matra Venus borehole pumps. For an open well or tank, see the Pentair Dominator 5″ well pumps. For a 3-inch bore, the Pentax 3S borehole pumps are slim enough to fit.

The pump body is AISI 304 stainless steel, the impellers are acetal resin and the diffusers are polycarbonate with ceramic inserts at the wear points. A non-return valve is built into the pump. The motor is a sealed dry motor cooled by the water around it, IP68 rated with Class F insulation, running at 2850 rpm, with the capacitor built in and a thermal cut-out in the winding. Pentair rates it for continuous duty. It comes with 20 metres of H07RN-F power cable and a 20 metre nylon suspension cord.

The pump is 643 mm long and 98 mm in diameter.

Features

• 57 m maximum head; 44.4 m at 40 l/min and 16.6 m at 80 l/min
• Eight stages, 0.8 kW motor, 230v single-phase, 5 A
• 98 mm diameter for 4-inch wells and boreholes
• AISI 304 stainless steel pump body, acetal resin impellers
• Built-in non-return valve
• IP68 motor with built-in capacitor and thermal cut-out
• 1¼” outlet, 20 m power cable and 20 m suspension cord

Applications

• Private water supply from a 4-inch borehole or well
• Feeding a domestic pressure system with a pressure vessel
• Filling a storage or header tank on higher ground
• Garden, paddock and small automatic irrigation systems

The 115/57 M is for clean water only, up to 40°C, with no suspended solids or abrasive material, so it is not suitable for sandy bores, drainage or dirty water. It has no float switch and runs whenever it has power, so it needs a pressure switch or level control. Pentair does not publish a minimum bore size, and a 4-inch bore leaves little room for the cable beside a 98 mm pump, so measure your casing before you order.

Dominator 4″ 115/57 M performance

The curve above also shows the 55/50 and 75/56, which are also no longer available; the 115/57 is the top line. See the Pentair Dominator 4″ well pumps page for help sizing a borehole pump and answers to common questions.