JS-250SV Sewage Vortex Pumps
The JS-250SV sewage vortex pump is a 1½-inch submersible pump from JS Pumps for light-duty sewage, foul water, dirty water and clean water. It moves up to 240 litres per minute and lifts to 6.5 metres from a 0.25 kW motor, and passes soft solids up to 36 mm. Six versions cover 230v mains and 110v site supplies, each in manual or automatic form.
The pump chamber, motor lid and seal housing are cast iron, with a stainless steel shaft and outer motor casing and twin mechanical seals in a lubricated chamber. A vortex impeller sits back from the inlet and spins the liquid rather than forcing every solid through the blades, so soft waste passes with less risk of blockage. On the JS-250SV the impeller is plastic. Each pump comes with 10 metres of cable and a 1½” BSP outlet with hose tail, and can be fitted to the SR50 coupling foot and claw for a guide rail installation.
Choosing a JS-250SV: manual, MAC-3 or AGMA
First pick your supply: 230v for mains power in a house or commercial building, 110v for a site transformer. Performance is the same on both; only the current changes, 1.9 A at 230v and 4.0 A at 110v.
Then choose how the pump switches. The JS-250SV manual runs whenever it is powered, so you control it with your own float switch or panel. The JS-250SVA carries a MAC-3 ball float on a tethered cable, which needs clear space around the pump to swing. The JS-250SVAG has an AGMA vertical float switch mounted on the pump body, so nothing hangs loose in the pit; it is wider than the other two at 215 mm against 160 mm.
| Model | Code | Voltage | Operation | Max Flow (l/min) | Max Head (m) | Current (A) |
|---|---|---|---|---|---|---|
| JS-250SV 230v Manual | 011-250 | 230v | Manual | 240 | 6.5 | 1.9 |
| JS-250SVA 230v Auto MAC-3 | 011-250A | 230v | Automatic MAC-3 | 240 | 6.5 | 1.9 |
| JS-250SVAG 230v Auto AGMA | 011-250AG | 230v | Automatic AGMA | 240 | 6.5 | 1.9 |
| JS-250SV 110v Manual | 011-252 | 110v | Manual | 240 | 6.5 | 4.0 |
| JS-250SVA 110v Auto MAC-3 | 011-252A | 110v | Automatic MAC-3 | 240 | 6.5 | 4.0 |
| JS-250SVAG 110v Auto AGMA | 011-252AG | 110v | Automatic AGMA | 240 | 6.5 | 4.0 |
Flow and head are the maximums from the JS-250SV performance curve; at 4 metres of head the pump gives roughly 100 l/min. For smaller domestic duties see the JS-150SV range, and for 2-inch and 3-inch outlets the JS SV single-phase sewage pumps.
Showing all 6 results
240 l/min · 6.5 m · 230v
1½" cast iron submersible sewage pump with a plastic vortex impeller, 0.25 kW, 230v, 1.9 A, manual operation. Up ...Read More£204.37 +VAT
240 l/min · 6.5 m · 230v
1½" cast iron submersible sewage pump with a plastic vortex impeller, 0.25 kW, 230v, 1.9 A, MAC-3 tethered float ...Read More£234.04 +VAT
240 l/min · 6.5 m · 230v
1½" cast iron submersible sewage pump with a plastic vortex impeller, 0.25 kW, 230v, 1.9 A, AGMA vertical float ...Read More£234.04 +VAT
240 l/min · 6.5 m · 110v
1½" cast iron submersible sewage pump with a plastic vortex impeller, 0.25 kW, 110v, 4.0 A, manual operation. Up ...Read More£204.37 +VAT
240 l/min · 6.5 m · 110v
1½" cast iron submersible sewage pump with a plastic vortex impeller, 0.25 kW, 110v, 4.0 A, MAC-3 tethered float ...Read More£234.04 +VAT
240 l/min · 6.5 m · 110v
1½" cast iron submersible sewage pump with a plastic vortex impeller, 0.25 kW, 110v, 4.0 A, AGMA vertical float ...Read More£234.04 +VAT
Where to Use the JS-250SV
The JS-250SV is sized for small sewage and waste water sumps where gravity cannot reach the drain: a downstairs toilet or shower room below the sewer, a utility room, an annexe or garden room, or a small commercial washroom. Because it takes soft solids up to 36 mm, it handles toilet waste as well as grey water from sinks and showers. The same pump is used in the JS Box 250 domestic pumping station if you would rather buy a ready-made tank and pump. Our guide on how to choose a sewage pump covers the questions to ask before you buy.
On construction sites, the 110v versions (4.0 A) drain welfare units, temporary toilet blocks and excavations from a standard site transformer. The automatic models suit any sump that needs to empty itself overnight or between visits; our float switch guide explains how the different switch types work.
Size the pump against its curve rather than the headline figures. Maximum head is the lift at which flow stops, so with 6.5 metres at the top of the curve the JS-250SV is best on short, low lifts. Our guide to reading a pump curve shows how to check the flow at your real lift and pipe run.
Frequently Asked Questions
What is the difference between the JS250SV and the JS150SV?
The JS-250SV is the larger and more robust of the two. It has a 1½-inch outlet, passes soft solids up to 36 mm and has a cast iron pump chamber with twin mechanical seals. The JS-150SV is a lighter 1¼-inch pump with a plastic body and a single mechanical seal, taking soft solids up to 25 mm.
JS-250SV or JS-400SV: which do I need?
Look at the lift. The JS-250SV tops out at 6.5 metres with a 1½-inch outlet. The JS-400SV in the JS SV single-phase range has a 2-inch outlet and a cast iron vortex impeller and reaches 7.5 metres. Step up when the discharge point is higher or the pipe run long.
What is the difference between the JS-250SVA (MAC-3) and JS-250SVAG (AGMA)?
Both switch the pump on and off automatically; the difference is the float. The JS-250SVA uses a MAC-3 ball float on a tethered cable, which swings up and down with the level and needs room to move. The JS-250SVAG has an AGMA vertical float switch fixed to the side of the pump, which keeps everything within the pump’s own footprint.
Can the JS-250SV be installed on guide rails?
Yes. JS lists the JS-250SV as compatible with the SR50 coupling foot and claw, which lets you lift the pump out of the pit for servicing without disconnecting the pipework. It can also stand free on the floor of the sump with the hose tail supplied. Maximum immersion depth is 7 metres.
Can the JS-250SV pump toilet waste?
Yes, within its light-duty rating. The vortex impeller passes soft solids up to 36 mm, including toilet waste. It does not cut or grind, so the discharge pipe should be at least the pump’s own 1½-inch size. Where waste has to go through small-bore pipework, a grinder such as the JS GS range is the better fit.
For help choosing the right JS-250SV for your sump or site, call the AES Rewinds team on 01252 515169 or email sales@aesrewinds.com. You can also browse all sewage and waste water pumps, or the JST SV 400v range if you have a three-phase supply.
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