Rule 37A Super Switch Bilge Pump Float Switch, 12/24/32V DC, 20 Amp

The Rule Super Switch 37A is a non-mercury bilge pump float switch built for the toughest applications, providing automatic on/off control for bilge pumps drawing up to 20 amps. The switch activates the connected bilge pump when water in the bilge reaches 2 inches and turns the pump off once the level falls to 3/4 inch, keeping the bilge compartment clear without manual intervention.

The Super Switch is fitted with a larger float than Rule's standard float switches for increased buoyancy and more reliable actuation, along with a detachable mounting base that allows the switch to be removed for cleaning or servicing without disturbing the wiring. Exclusive moisture-tight seals and 14 AWG, highly abrasion-resistant marine-grade blocked wire (28 inches long) protect the internal switch mechanism from bilge water and prevent corrosion at the wire connections. The switch is entirely mercury-free and backed by a 5 year warranty.

The Rule Super Switch 37A supports 12, 24, or 32 volt DC systems, with amp draw ratings of 20 amps at 12V, 10 amps at 24V, and 6.5 amps at 32V, making it suitable for a wide range of submersible bilge pumps on boats and other marine vessels.

Specifications

• Brand: Rule
• Manufacturer Part Number: 37A
• Type: Float Switch
• Voltage: 12/24/32 VDC
• Amp Draw: 20 amps at 12V, 10 amps at 24V, 6.5 amps at 32V
• Dimensions: 5 inches L x 2 inches W x 2 inches H
• Wire Size: 14 AWG
• Wire Length: 28 inches
• Weight: 0.83 pounds
• Activation Water Level: 2 inches
• Deactivation Water Level: 3/4 inch
• Maximum Pump Amperage: 20 amps
• Mounting Base: Removable
• Mercury Content: Mercury-free
• Warranty: 5 years
• UPC: 042237095497

Frequently Asked Questions

What does the Rule Super Switch 37A do? The Rule Super Switch 37A is a bilge pump float switch that automatically turns a connected bilge pump on and off based on the water level in the bilge, so the pump does not need to be operated manually.

At what water level does the 37A Super Switch activate and shut off? The Super Switch 37A activates the bilge pump when water reaches 2 inches and turns the pump off once the level falls to 3/4 inch.

How many amps can the Rule 37A float switch handle? The 37A is rated for pumps drawing up to 20 amps at 12V, 10 amps at 24V, and 6.5 amps at 32V, making it suitable for high-capacity bilge pumps.

Does the Super Switch 37A contain mercury? No. The Rule Super Switch 37A is a mercury-free float switch.

What voltage systems is the 37A compatible with? The Super Switch 37A supports 12V, 24V, and 32V DC electrical systems.

How is the 37A different from Rule's standard Rule-A-Matic float switch? The Super Switch 37A uses a larger float for increased buoyancy, is rated up to 20 amps versus 14 amps on the standard Rule-A-Matic, adds 32V DC support, and carries a 5 year warranty compared to a 2 year warranty on the standard model.

Can the mounting base be removed for cleaning? Yes, the Rule 37A Super Switch has a detachable mounting base that allows the switch to be removed for cleaning or servicing.

What gauge wire is used on the Super Switch 37A? The 37A is wired with 14 AWG, highly abrasion-resistant marine-grade blocked wire measuring 28 inches in length.

What are the dimensions and weight of the Rule 37A float switch? The Super Switch 37A measures 5 inches long by 2 inches wide by 2 inches high and weighs 0.83 pounds.

What warranty comes with the Rule Super Switch 37A? The Rule Super Switch 37A includes a 5 year warranty.

Is the Rule 37A designed for continuous submersion? Yes, the Super Switch 37A uses exclusive moisture-tight seals to protect the switch mechanism in the wet bilge environment.