JS-750SV 230v Automatic 3″ Sewage Submersible Pump

Description

The JS Pumps JS-750SV 230v Automatic (code 012-751A) is the first 3-inch model in the JS SV single-phase range: a cast iron submersible sewage pump with a vortex impeller. It delivers up to 450 litres per minute and lifts to a maximum head of 8 metres from a 0.75 kW motor, through a 3″ outlet, on a standard 230v single-phase mains supply, drawing 6.8 A at full load.

This is the automatic version, fitted with a MAC-3 float switch that starts the pump as the level rises and stops it as the sump empties. Allow roughly 300 mm of clear space around the pump so the float can swing freely. The JS-750SV 230v Manual is the same pump without the float, for use with your own controls. Compared with the JS-650SV 230v Automatic, it trades head (8 m against 12 m) for more flow and a larger outlet. On mains power, the JS-1500SV 230v Automatic is the high-volume step up at 795 l/min.

Every JS SV pump shares the same construction: a cast iron pump body and vortex impeller, a cast iron volute, motor top cover and lower bearing and seal housing, and a stainless steel shaft and motor case. Twin mechanical seals (carbon ceramic and silicon carbide) run in a lubricated oil chamber. The side-mounted outlet points vertically upwards and can be removed to fit a coupling foot for guide rail installation, and each pump comes with 10 metres of power cable and a hose tail.

JS Pumps also lists Class F motor insulation, a shaft sleeve to reduce wear, an additional lip seal that keeps grit away from the mechanical seals, thermal overload protection and an improved cable entry seal for this model.

Features

• Cast iron pump body, volute and vortex impeller
• Vortex impeller sits clear of the flow, so soft solids pass through with less risk of blockage
• Twin mechanical seals (carbon ceramic and silicon carbide) in a lubricated oil chamber
• Thermal overload protection (JS Pumps specification)
• 0.75 kW motor, 230v, 6.8 A
• Up to 450 l/min and 8 m head
• 3″ side vertical outlet with hose tail, removable for a coupling foot
• MAC-3 float switch for automatic operation
• 10 metres of power cable

Applications

• Sewage and foul water sumps in houses, annexes and outbuildings
• Higher-volume pits feeding a 3-inch discharge
• Commercial and light industrial waste water pits
• Basement and below-ground drainage carrying soft solids
• Dirty water and drainage
• Unattended duty where the pump must switch itself

Built for sewage, foul water, dirty water and drainage containing soft solids. A vortex pump does not cut or macerate, so it is not the right choice for small-bore pressure pipework; for that, look at the JS GS grinder pumps. It is not designed for oils, fuels, solvents or chemicals.

The JS SV single-phase range

Flow and head are maximums from the JS SV performance curve above. See the JS SV single-phase sewage pump range page to compare every version and for answers to common questions.