JS-250SVA 110v Automatic M/3 Sewage Vortex Pump

Description

The JS Pumps JS-250SVA 110v Automatic MAC-3 (code 011-252A) is the 110v JS-250SV with a MAC-3 tethered float switch, so it can empty a sump on site without anyone switching it. It delivers up to 240 litres per minute and lifts to a maximum head of 6.5 metres from a 0.25 kW motor, through a 1½” outlet, on a 110v site transformer, drawing 4.0 A. It passes soft solids up to 36 mm.

The MAC-3 is a ball float on its own cable, clipped to the pump. It rises with the level to start the pump and drops to stop it, so leave clear space around the pump for the float to swing without catching on the pit wall. If your sump is tight, the JS-250SV 110v Automatic AGMA carries a vertical switch on the pump body instead, and the JS-250SV 110v Manual is the same pump without a float for use with your own controls. The same pump is also available as the 230v automatic MAC-3 version.

If 6.5 metres of head is not enough, the JS-400SV 110v steps up to a 2-inch outlet and a cast iron vortex impeller, with 260 l/min and 7.5 m. For lighter domestic waste, the JS-150SV range is the smaller 1¼-inch pump.

The JS-250SV has a cast iron motor lid, lower motor and seal housing and pump chamber, with a stainless steel shaft and outer motor casing. The vortex impeller is plastic, and twin mechanical seals run in a lubricated chamber. Every version weighs around 15 kg, comes with 10 metres of power cable and has a 1½” BSP female outlet supplied with a 1½” BSP male hose tail. Maximum immersion depth is 7 metres.

Features

• Cast iron pump chamber, motor lid and seal housing
• Plastic vortex impeller, set back from the inlet so soft solids pass through
• Passes soft solids up to 36 mm
• Twin mechanical seals in a lubricated chamber
• Stainless steel shaft and outer motor casing
• 0.25 kW motor, 110v, 4.0 A
• Up to 240 l/min and 6.5 m head
• 1½” BSP female outlet with 1½” BSP male hose tail
• MAC-3 tethered float switch for automatic operation
• Fits the SR50 coupling foot and claw for guide rail installation
• 10 metres of power cable; maximum immersion 7 metres
• 415 x 160 x 260 mm (H x W x L), around 15 kg

Applications

• Light-duty sewage and foul water on construction sites
• Welfare cabins and temporary toilet blocks on a 110v supply
• Dirty water from excavations, sumps and service trenches
• Clean water transfer
• Unattended sumps where the pump must switch itself

JS rates this pump for light-duty sewage, dirty water and clean water. A vortex pump does not cut or macerate, so it is not suited to small-bore pressure pipework or heavy commercial sewage; for those, look at the JS GS grinder pumps or the larger JS SV single-phase sewage pumps. It is not designed for oils, fuels, solvents or chemicals. Check the curve before you buy: at 4 metres of head the pump gives roughly 100 l/min, and flow falls to nothing at 6.5 metres. Make sure your site transformer can supply 4.0 A continuously.

The JS-250SV range

Flow and head are maximums from the JS-250SV performance curve above. See the JS-250SV sewage vortex pump range page to compare every version and for answers to common questions.