Attwood Bilge Switch S3 Series - 12V is an automatic bilge switch designed to protect your pump and onboard electronics. It uses proprietary Electronic Sensing technology to detect bilge water levels and trigger pump activation, delivering reliable performance in any bilge condition.
Unlike traditional switches, the S3 can distinguish splashing bilge water, chemicals, sludge buildup, or foam, preventing unnecessary pump cycling. Its fully sealed electronics stay protected from water and chemical damage, delivering consistent operation even in harsh environments.
For convenience, the switch can be mounted on the bilge floor, directly to a stringer wall, or alongside the pump basket — without any extra components or brackets. The S3 Series is directly compatible with many competitive products and features no moving parts that can jam, wear, or fail over time.
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12V, 15 Amp switching capability for dependable pump operation
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36" wire for flexible installation
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5-Year Warranty for long-term peace of mind
- Part #: 4801-7, Manufacturer: Attwood Marine
- UPC: 022697048011
Designed to work with a wide range of bilge configurations, the Attwood S3 Series delivers reliable, maintenance-free performance. Keep your bilge protected and your pumps ready to go with a switch that knows the difference between water and debris, automatically activating when you need it and staying quiet when you don’t.
