JS RS 100 1" Light Duty Drainage Pumps

Where to Use the RS-100

The RS-100 is designed for light-duty drainage in confined spaces where a compact, low-cost pump is the right fit. Typical applications include small plant room sumps, condensate collection tanks, equipment drip trays, and light dewatering tasks where the volume of water is modest and the solids content is minimal. It’s a common choice for facilities managers dealing with small, self-contained drainage points that don’t justify a larger sewage or dirty water pump.

Because it’s built with a plastic body and impeller rather than cast iron, the RS-100 isn’t intended for heavy-duty or continuous use. It’s not suitable for permanent pond installations, and the manufacturer specifically notes it shouldn’t run continuously. If your application involves constant operation, larger volumes, or heavier solids, our range of sump pumps includes more robust options built for sustained duty. For background on how sump pumps work more generally, our guide to sump pumps is a useful starting point.

One installation detail worth noting: the RS-100 must be installed upright and must not be laid on its side, as this can affect motor cooling and lead to premature failure. Make sure your sump or tank has enough depth to accommodate the pump’s 260mm height in an upright position.

Frequently Asked Questions

What’s the difference between the 110v and 230v RS-100?

Performance is identical between the two, the only difference is voltage. The 110v model suits construction sites and other installations using reduced voltage equipment, while the 230v model is for standard mains supply.

Does the RS-100 come with a float switch?

No, it’s supplied without one as standard. For automatic operation, you can add a compatible Mac-3, Mouse, or REKA float switch separately. Get in touch with our team if you’d like advice on which control suits your tank or sump size.

Can the RS-100 be used in a pond?

It’s not designed for continuous pond usage. The plastic construction and light-duty motor are intended for occasional or intermittent drainage tasks rather than the sustained running that pond circulation requires.

What size solids can the RS-100 handle?

Up to 4mm. It’s suited to clean water and lightly contaminated water rather than heavily soiled or solid-laden drainage. For dirtier water with larger particles, a dedicated dirty water or sewage pump would be a better fit.

Why can’t the RS-100 be installed on its side?

The pump relies on being upright for correct motor cooling. Installing it on its side can cause the motor to overheat and fail prematurely, so it should always be positioned vertically within the sump or tank.

If you’re unsure whether the RS-100 suits your application or need help specifying the right float switch, our team can talk you through the options. Browse our full drainage pump range for other options, or call us on 01252 515169.