FN20 – “E” Series Mechanical Sump Switch

The FN20 “E” Series Sump Float Switch is a foam-filled, polypropylene covered sump fluid sensor that is commonly used in domestic applications like sump or basement pumps. This sump float switch may also be used for septic tanks and ejector pumps. The new foam-filled sump switch design has greatly improved the life span of these mechanical floats. The foam filling protects the mechanism which prevents it from breaking in transit or from rough handling around the tank.

These float switches are fully customizable to meet a variety of commercial, industrial, or other uses. Sump level switches are durable, making them ideal for direct pump control up to 1/2 HP at 120 VAC or 1 HP at 240 VAC. Standard features include a 20’ foot 16/2 SJOW Cable with 120 VAC plug and a stainless steel pipe clamp mounting assembly.

These variable-level single ball float switches feature piggyback design and simple on/off functionality and are ideal for consumer or industrial use. While sump switch failure is common among many commercial brands, rest assured that SMD Fluid Controls offers superior craftsmanship alongside the kind of reasonable prices you expect from national brands.

Features & Benefits

• Durable ABS body foam-filled construction
• Mechanical type actuation (no mercury)
• Wide-angle (90 operating range)
• Pump duty rated
• Rated 1/2 Hp at 120VAC, 1 Hp at 240 VAC (13 Amps)
• Available with piggyback 120V or 230 V plug or without plug
• Available in pump up or down configurations
• Available with an external weight, stainless steel pipe clamp, or cable tie
• Multiple cord lengths available

Ask Questions / Get Quote

FN20-A014-XXX-E Normally Open  NO | FN20-A017-XXX-E Normally Closed NC

A Pump Up Float Switch, also known as ‘Normally Closed’, opens the circuit on the rise and is typically used to turn the pump off when the float is in the up position. So, a pump could be set to turn off when the water level in the storage tank reaches a predetermined high level. Therefore, a pump-up float switch is often used to fill a water tank. 

A Pump Down Float Switch, also known as ‘Normally Open’, closes the circuit on the rise and is typically used to turn the pump off when the float is in the down position. So, a pump could be set to turn off when the water level in the storage tank reaches a predetermined low level. Therefore, a pump down float switch is often used to empty a water tank. 

• Normally Open = Pump Down

• Normally Closed = Pump Up

More About Mechanical Sump Level Switches:

Sump Pump Up Keep | DIY Sump Pump Install | How To Replace Sump Pump Float