{"product_id":"t-h-marine-800-gph-automatic-bilge-pump-3-4-in-hose","title":"T-H Marine 800 GPH Automatic Bilge Pump, 3\/4 in Hose","description":"\u003cp class=\"nvn-hero\"\u003eThe T-H Marine 800 GPH Automatic Bilge Pump gives small and mid-size boats hands-off protection down in the bilge. A built-in float switch starts it on rising water, an 8 second delay keeps it from rapid-cycling in chop, and the stainless steel shaft and tinned leads stand up to saltwater. Ignition protected and ready for a 3\/4 inch discharge line.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eThe T-H Marine 800 GPH Automatic Bilge Pump is the kind of pump you install once and mostly forget about, which is exactly what you want from bilge gear. It's a submersible pump with a built-in automatic float switch, so it watches the water level for you and kicks on when the bilge starts filling. No separate switch to wire, no float to mount in a tight corner. Drop it in, plumb it, wire it, and you've got automatic protection down low where water collects.\u003c\/p\u003e\n\u003cp\u003eRated at 800 gallons per hour on 13.6 volts DC, this one sits in the sweet spot for small to mid-size boats. Think 20 to 25 foot center consoles, bass boats, aluminum fishing rigs, and runabouts where you're clearing rainwater, spray, and the occasional bit of intrusion rather than fighting a serious breach. It draws about 5 amps while running, so it's easy on a small battery bank and won't drag your system down if it cycles a few times overnight at the dock.\u003c\/p\u003e\n\u003cp\u003eThe automatic switch is the heart of it. When water rises, the float trips and the motor starts. When the level drops back down, there's an 8 second shut-off delay before the pump stops, which keeps it from rapid-cycling every time a wake rocks the boat and sloshes the last bit of water around. That delay matters more than it sounds. A pump that clicks on and off a dozen times in choppy water wears out its switch fast and runs the battery down for no reason. The delay lets the bilge settle before the pump decides it's done.\u003c\/p\u003e\n\u003cp\u003eWiring is straightforward. The leads are tinned copper, so they resist the corrosion that eats plain copper alive in a damp bilge. That's a detail worth appreciating. Most bilge pump failures we see aren't the motor giving up, they're a green, crusty connection that finally quit passing current. Tinned wire buys you years. We still tell folks to seal every connection with adhesive-lined heat shrink and run a properly rated fuse, usually a 10 amp, on the positive lead close to the battery. The pump pulls 5 amps in normal use, but you want headroom for startup surge and a fuse that protects the wire, not just the motor.\u003c\/p\u003e\n\u003cp\u003eIt's ignition protected, which means the motor is built so it won't set off fuel vapors. That's the standard you want in any bilge or engine compartment where gas fumes can collect. Even so, use common sense on placement and keep the pump and its connections away from the battery and any fuel fittings when you can. The impeller shaft is stainless steel, so it stands up to saltwater far better than a plain plated shaft. If you run in salt, that stainless shaft is one less thing corroding on you season after season.\u003c\/p\u003e\n\u003cp\u003eOn the plumbing side, it fits standard 3\/4 inch inner diameter hose. Run smooth-bore hose if you can and avoid tight bends, because 3\/4 inch hose kinks easily on a sharp turn and a kinked line kills your flow rate. Double-clamp the connection at the pump and route the discharge up and out through a properly placed thru-hull above the waterline. A loop in the line helps keep water from siphoning back in through the discharge when the pump is off.\u003c\/p\u003e\n\u003cp\u003eReal talk on what this pump is and isn't. It's an excellent primary pump for a small boat or a great secondary backup on a bigger one. It's not a substitute for finding and fixing a leak, and no 800 GPH pump is going to keep a holed hull afloat. Bilge pumps buy you time, not miracles. For most weekend anglers and cruisers running smaller boats, though, 800 GPH of automatic, ignition-protected pumping with a stainless shaft and tinned leads is exactly the right amount of pump.\u003c\/p\u003e\n\u003cp\u003eMaintenance is easy and worth doing. Pull the pump base a couple times a season and clear out the leaves, sand, and debris that collect around the impeller, since that's what jams these up. Give the float switch a wipe so oil and grime don't gum up its travel, and test the whole thing by lifting the float or pouring a little water in the bilge before every big trip. Thirty seconds of testing at the dock beats finding out the hard way offshore.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003e800 GPH flow rate at 13.6V DC clears small bilges fast on boats in the 20 to 25 foot range\u003c\/li\u003e\n  \u003cli\u003eBuilt-in automatic float switch starts the pump on rising water, no separate switch to wire\u003c\/li\u003e\n  \u003cli\u003e8 second shut-off delay prevents rapid cycling in chop, saving the switch and the battery\u003c\/li\u003e\n  \u003cli\u003e5 amp operating draw is easy on small battery banks\u003c\/li\u003e\n  \u003cli\u003eTinned copper leads resist bilge corrosion for longer connection life\u003c\/li\u003e\n  \u003cli\u003eIgnition protected motor is safe for gasoline engine compartments\u003c\/li\u003e\n  \u003cli\u003eStainless steel impeller shaft stands up to saltwater corrosion\u003c\/li\u003e\n  \u003cli\u003eFits standard 3\/4 inch inner diameter discharge hose\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"nvn-trust\"\u003e\n  \u003ch2\u003eWhy Buy from NVN Marine\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eAuthorized T-H Marine Supplies reseller, full manufacturer warranty\u003c\/li\u003e\n    \u003cli\u003eNMEA member and ABYC certified, advice from real boat techs\u003c\/li\u003e\n    \u003cli\u003eSame-day shipping before 3 PM ET on in-stock items\u003c\/li\u003e\n    \u003cli\u003eNY headquarters and Fort Lauderdale flagship retail store\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"nvn-faq\"\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill this pump keep my boat from sinking?\u003c\/summary\u003e\n    \u003cp\u003eA bilge pump buys you time, it doesn't fix a leak. At 800 GPH this is a strong primary pump for a small boat or a good secondary backup on a larger one, meant for clearing rainwater, spray, and minor intrusion. No 800 GPH pump will keep a holed hull afloat, so always find and fix the source of any real water.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDo I need to buy a separate float switch?\u003c\/summary\u003e\n    \u003cp\u003eNo. The automatic float switch is built into the pump. Water rising in the bilge trips the float and starts the motor, so there's nothing extra to mount or wire.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat size fuse should I use?\u003c\/summary\u003e\n    \u003cp\u003eThe pump draws about 5 amps while running, and a 10 amp fuse on the positive lead close to the battery is a common choice that leaves headroom for startup surge and protects the wire. Confirm against your boat's wiring and the installation sheet.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat hose size does it fit?\u003c\/summary\u003e\n    \u003cp\u003eIt's built for standard 3\/4 inch inner diameter discharge hose. Use smooth-bore hose, avoid tight bends that can kink the line, and double-clamp the connection at the pump.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhy does the pump keep running for a few seconds after the water is gone?\u003c\/summary\u003e\n    \u003cp\u003eThat's the 8 second shut-off delay working as designed. It stops the pump from rapid-cycling every time a wake sloshes the last bit of water around, which saves the switch and the battery.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I use it in saltwater?\u003c\/summary\u003e\n    \u003cp\u003eYes. The stainless steel impeller shaft resists saltwater corrosion better than a plated shaft, and the tinned copper leads hold up in a damp bilge. Still seal every connection with adhesive-lined heat shrink and clear debris from the impeller a couple times a season.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs it safe for a gasoline engine compartment?\u003c\/summary\u003e\n    \u003cp\u003eYes. The motor is ignition protected, so it's built not to set off fuel vapors. Even so, keep the pump and its connections away from the battery and fuel fittings where you can.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat size boat is this pump right for?\u003c\/summary\u003e\n    \u003cp\u003e800 GPH is a good primary pump for boats roughly in the 20 to 25 foot range, like center consoles, bass boats, aluminum fishing rigs, and runabouts. On a larger boat it makes a solid secondary backup pump.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"nvn-specs\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eTitle\u003c\/th\u003e\n\u003ctd\u003eT-H Marine 800 GPH Automatic Bilge Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eT-H Marine\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003eBE-PL-57422-DP\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e733572186611\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eFlow Rate\u003c\/th\u003e\n\u003ctd\u003e800 Gallons Per Hour\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eVoltage\u003c\/th\u003e\n\u003ctd\u003e13.6 Volt DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOperating Current\u003c\/th\u003e\n\u003ctd\u003e5 Ampere\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eHose Size\u003c\/th\u003e\n\u003ctd\u003e3\/4 Inch Inner Diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSwitch Type\u003c\/th\u003e\n\u003ctd\u003eSubmersible with Automatic Float Switch\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eShut-Off Delay\u003c\/th\u003e\n\u003ctd\u003e8 Seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eWiring\u003c\/th\u003e\n\u003ctd\u003eTinned Wires\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eIgnition Protection\u003c\/th\u003e\n\u003ctd\u003eIgnition Protected\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eImpeller Shaft\u003c\/th\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Will this pump keep my boat from sinking?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"A bilge pump buys you time, it doesn't fix a leak. At 800 GPH this is a strong primary pump for a small boat or a good secondary backup on a larger one, meant for clearing rainwater, spray, and minor intrusion. No 800 GPH pump will keep a holed hull afloat, so always find and fix the source of any real water.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Do I need to buy a separate float switch?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"No. The automatic float switch is built into the pump. Water rising in the bilge trips the float and starts the motor, so there's nothing extra to mount or wire.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What size fuse should I use?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The pump draws about 5 amps while running, and a 10 amp fuse on the positive lead close to the battery is a common choice that leaves headroom for startup surge and protects the wire. Confirm against your boat's wiring and the installation sheet.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What hose size does it fit?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's built for standard 3\/4 inch inner diameter discharge hose. Use smooth-bore hose, avoid tight bends that can kink the line, and double-clamp the connection at the pump.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Why does the pump keep running for a few seconds after the water is gone?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"That's the 8 second shut-off delay working as designed. It stops the pump from rapid-cycling every time a wake sloshes the last bit of water around, which saves the switch and the battery.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can I use it in saltwater?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. The stainless steel impeller shaft resists saltwater corrosion better than a plated shaft, and the tinned copper leads hold up in a damp bilge. Still seal every connection with adhesive-lined heat shrink and clear debris from the impeller a couple times a season.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is it safe for a gasoline engine compartment?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. The motor is ignition protected, so it's built not to set off fuel vapors. Even so, keep the pump and its connections away from the battery and fuel fittings where you can.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What size boat is this pump right for?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"800 GPH is a good primary pump for boats roughly in the 20 to 25 foot range, like center consoles, bass boats, aluminum fishing rigs, and runabouts. On a larger boat it makes a solid secondary backup pump.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"T-H Marine","offers":[{"title":"Default Title","offer_id":45074713346141,"sku":"2009521","price":35.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_46457d03-eab4-432d-9fdf-0a34d33cadee.jpg?v=1789812057","url":"https:\/\/nvnmarine.com\/products\/t-h-marine-800-gph-automatic-bilge-pump-3-4-in-hose","provider":"NVN Marine","version":"1.0","type":"link"}