Rule
Rule-Mate 500 GPH Automatic Bilge Pump, 12V
Fully automatic 500 GPH bilge pump with a built-in electronic float. No separate switch to install or fail.
$69.99
Parts & accessories division of Gann Marine LLC
Marine parts picked by the techs who install them.
Bilge pumps, safety gear, electronics and maintenance supplies from the brands we trust in our own service bays. Shipped fast to your door or dock.
- 🚚 Free shipping $99+
- ↩️ 30-day returns
- 🔒 Secure checkout
- 🧰 Real technician support
Shop by category
Bilge Pumps & PlumbingAutomatic and manual bilge pumps, float switches and plumbing that keep water out of your hull.Safety Gear & USCG EssentialsLife jackets, fire extinguishers, flares, PLBs and the gear you need to pass a Coast Guard check.Docking & AnchoringDock lines, fenders, anchors and boarding ladders for stress-free days at the dock and sandbar.Marine Electrical & BatteriesBattery switches, fuse blocks, on-board chargers, USB outlets and battery boxes.Navigation & LED LightingUSCG-compliant LED navigation lights, all-round pole lights and underwater lighting.Fish Finders, VHF & AudioGarmin and Humminbird fish finders, VHF radios, antennas and Fusion marine audio.Trolling Motors & FishingMinn Kota trolling motors, rod holders, mounts and fishing accessories.Engine & Outboard MaintenanceLower unit gear lube, grease, fuel treatment, fuel line kits and maintenance supplies.Boat Care & CleaningUV protectant, wax, hull cleaner and detailing supplies that stand up to Florida sun.Trailer Parts & AccessoriesBearing protectors, tie-downs, guide-ons, jacks and LED trailer lights.Pontoon, Seating & CoversBoat seats, bimini tops and covers built for pontoons, deck boats and fishing boats.
Tech picks for this season
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Onyx
Onyx A/M-24 Automatic/Manual Inflatable Life Jacket
Lightweight, USCG-approved inflatable PFD that inflates automatically in water. Cool enough for Florida summers.
$99.99
Garmin
Garmin STRIKER Vivid 5cv Fish Finder with Transducer
5-inch color fish finder with ClearVü and CHIRP sonar plus built-in GPS for marking waypoints.
$249.99
Extreme Max
Extreme Max BoatTector Bungee Dock Line (Pair)
Stretch dock lines that absorb wake shock, protecting cleats, gelcoat and your sleep.
$34.99
303
303 Marine UV Protectant, 32 oz
The best-known UV protectant for vinyl seats, rubber, plastic and fiberglass.
$26.99
Gann Marine Supply
Pontoon Sandbar Day Bundle
Box anchor, bungee dock lines and a throwable cushion: everything to anchor up and party safely.
$199.99
Standard Horizon
Standard Horizon HX210 Floating Handheld VHF Radio
Compact floating handheld VHF with NOAA weather alerts. A must for any boat without a fixed radio.
$139.99
Blue Sea Systems
Blue Sea Systems ST Blade Fuse Block, 12 Circuits with Negative Bus
Clean up rat-nest wiring with a proper fused distribution block and built-in negative bus.
$49.99
Parts Concierge: send a photo, get the right part.
Not sure which impeller, switch or fitting you need? Text a photo of the old part and your engine info to (352) 604-0577. A Gann Marine technician will reply with the exact part and a link to buy it.
⚓ Run by marine techs
We're a working marine service company, not a faceless warehouse. Every product we list is one we'd put on a customer's boat.
📦 Ships from authorized distribution
Orders ship directly from authorized U.S. marine distribution centers, typically within 1–2 business days.
📞 Talk to a human
Call or text (352) 604-0577. You'll reach someone who knows the difference between a 3/4" and 1-1/8" outlet.
Boating guides
All guides →Florida Boating Safety Equipment Checklist (USCG + FWC Requirements)Exactly what safety gear Florida boaters must carry: life jackets, throwables, fire extinguishers, distress signals, sound devices and lights, explained by a marine technician.How to Size a Bilge Pump for Your Boat (Real-World GPH Explained)Why a 500 GPH pump rarely pumps 500 GPH, how to pick the right bilge pump size by boat length, and when you need a second pump.12 Best Pontoon Boat Accessories for Florida Sandbar DaysThe pontoon accessories that actually get used: anchors that hold in sand, bungee dock lines, shade, covers, audio and safety gear, picked by marine techs.Outboard Maintenance Checklist for Florida Boaters (From a Marine Tech)A season-by-season outboard maintenance checklist covering gear lube, impellers, fuel, grease points, anodes and flushing, with the parts we use in our shop.
Frequently asked questions
How fast do orders ship?
Most orders leave our distribution partners within 1–2 business days and arrive in 2–6 business days in the continental US. You get a tracking number by email as soon as it ships.
Is shipping free?
Shipping is free on orders over $99. Smaller orders ship for a flat $9.95.
Who is Gann Marine Supply?
We are the parts and accessories division of Gann Marine LLC, a marine service company run by working technicians in Central Florida. We only sell parts we would install on our own boats.
Can you help me find the right part?
Yes. Use our free Parts Concierge or call or text (352) 604-0577 with your boat or engine make, model, year and a photo of the old part, and a technician will confirm fitment before you buy.
What is your return policy?
New, uninstalled items in original packaging can be returned within 30 days. Contact us first for a return authorization. If we sent the wrong item or it arrived damaged, we cover return shipping.
Do you charge sales tax?
Sales tax is calculated at checkout based on your shipping address where required.