Rule Industries 37FA SuperSwitch Marine Float Switch with Fuse Holder

The Rule Industries 37FA SuperSwitch is a heavy-duty, non-mercury marine bilge pump float switch built for the most demanding marine applications. Featuring an integrated waterproof in-line fuse holder, the 37FA eliminates the need to add a separate fuse to the positive battery lead — protecting both the pump and switch from damage in the event of an electrical fault.

Automatic Bilge Pump Control: This switch automatically activates the bilge pump when water rises to 2" (51mm) and shuts it off when the level drops back to 3/4" (19mm). It can also be used to trigger high-water alarm systems.

Key Features:

• Mercury-free design — environmentally responsible and safe for all marine environments
• Marine-grade 14-gauge blocked wire — tinned and gasketed leads for superior corrosion resistance and moisture prevention
• Larger float for increased buoyancy and reliable water-level sensing
• Snap-action switch — tested to over 1,000,000 cycles at 12V for long-lasting reliability
• Removable base for easy cleaning and servicing without full removal
• Integrated waterproof in-line fuse holder — protects pump and switch from electrical faults
• Compatible with pumps drawing up to 20 Amps
• Multi-voltage compatible — works with 12V, 24V, and 32V DC systems
• Exclusive moisture-tight seals for reliable submersible performance
• Backed by a 5-year limited warranty

The Rule 37FA SuperSwitch is ideal for bilge pump automation in boats, sailboats, and other marine vessels where dependable, maintenance-friendly float switch performance is essential.