Best Transom Mount Livewell Pump for Boat Bait Tanks

#1 · Best Overall

1. Yaegoo 800 GPH Livewell Pump

• Dimensions: 8.15"L x 2.83"W x 9.25"H
• Weight: 0.6 kg
• Material: Plastic
• Voltage: 12 V

Best for: Confined-space cartridge service.

Why it ranks #1: Its listing specifically notes extra length for thicker transoms, alongside 800 GPH output, a 90-degree threaded intake, and a removable cleaning cartridge.

Anti-airlock fins and a compact profile define this Yaegoo 800 GPH pump, helping maintain even water flow while accommodating tighter installation spaces. Its removable cartridge also gives owners access for cleaning or replacement, and its 12V operation suits compatible boat electrical systems.

The 90-degree threaded intake measures 125mm long, and the listing notes extra length for thicker transoms, a useful combination when choosing an intake arrangement. Anti-airlock fins are specified to support even flow, while the compact profile addresses confined spaces. The cartridge can be removed for cleaning or replacement, giving maintenance a clear service path. A stainless-steel shaft and corrosion-resistant construction are listed for freshwater or saltwater use; the pump is fully submersible and uses tin-coated 16-gauge wire.

Skip it if you need a straight intake option; the Amarine Made pump includes straight and 90-degree outlet hose tails, though its intake is also 90-degree.

This Yaegoo suits boaters fitting an 800 GPH pump into a confined area who want a removable cartridge for upkeep. Its listed intake is 90-degree, so confirm that arrangement works with the transom plumbing.

Listed on Amazon as: Livewell Pump 800GPH 12V, Live Well Pump for Boat, Live Bait Tank Aerator

#2 · Best Fitting Choice

2. SEAFLO 05 Series 800 GPH

• Dimensions: 8.15"L x 2.83"W x 5.62"H
• Weight: 1.3 lb
• Material: Polypropylene (PP)
• Voltage: 12 V DC

Best for: Angled outlet installations.

Why it ranks #2: The 800 GPH, 12-volt pump includes both straight and 90-degree hose-barb fittings, useful when matching an existing livewell hose route.

The SEAFLO 05 Series pairs an angled pump configuration with 800 GPH flow, giving boat owners a way to circulate livewell water where a 90-degree outlet suits the hose route. Its 12V DC operation and freshwater-and-saltwater rating make it a practical option for varied marine setups.

The 800 GPH rating supports substantial livewell circulation, while the 3⁄4-inch NPT outlet connects with the supplied threaded hose-to-barb fittings. Choose the included angled or straight fitting to match the plumbing route; two rubber gaskets and the sealing nut support installation. The detachable motor is useful when service is needed, and the polypropylene pump is specified for freshwater and saltwater use. Its 12V DC supply and 4.0A current specification help buyers plan the electrical connection.

Skip it if you need a wire lead longer than three feet; the T-H Marine pump lists a 30-inch lead, though that is shorter still.

For boaters setting up a 12V livewell in fresh or salt water, this SEAFLO offers 800 GPH flow and outlet choices. Check that its 3-foot lead reaches your planned electrical connection.

Listed on Amazon as: SEAFLO 05 Series 800 GPH Angled Baitwell/Livewell Pump- 12V DC, Detachable Motor, Corrosion-Resistant Submersible Aerator for Freshwater and Saltwater Use – CE & Rohs Certified-4 Year Warranty.

#3 · Best Outlet Flexibility

3. Amarine Made 800 GPH Pump

• Dimensions: 8.15"L x 2.7"W x 11.4"H
• Weight: 1.3 lb
• Material: Plastic
• Voltage: 12 V DC

Best for: Flexible outlet routing.

Why it ranks #3: This 800 GPH, 12-volt cartridge pump includes straight and 90-degree outlet tails and has a 90-degree threaded intake.

Two outlet hose-tail configurations—straight and 90-degree—give this Amarine Made pump useful flexibility when routing livewell plumbing. It combines that choice with 800 GPH flow at 12V and a removable cartridge, serving boaters who want service access without giving up outlet options.

The 800 GPH rating supports livewell or bait-tank circulation, while the supplied straight and 90-degree outlet tails let the hose leave in a route that better suits the boat. Internal anti-airlock fins are specified to keep water flow even. The cartridge removes for cleaning or replacement, simplifying those service tasks. A fully submersible design and tin-coated 18-gauge wire are also listed. The 90-degree threaded intake is 125mm long, a detail relevant when laying out the transom connection.

Skip it if you require a straight intake; the SEAFLO 04 Series is listed with a straight intake, though its outlet fittings offer the same two routing choices.

For a 12V livewell needing 800 GPH and adaptable outlet routing, this Amarine Made pump offers useful service access. Its intake remains 90-degree, so the installation must accommodate that layout.

Listed on Amazon as: Amarine Made 12v 800gph Livewell Pump for Boat 4.0A Livewell Aerator Pumps Live Bait Tank Aerator Submersible Cartridge 90-Degree Boat Aerator Pump

#4 · Best Cartridge Access

4. YaeMarine 800 GPH Pump

• Dimensions: 8.15"L x 2.83"W x 5.62"H
• Weight: 1.2 lb
• Material: Plastic
• Voltage: 12 V DC

Best for: Water-cooled cartridge pump.

Why it ranks #4: Its removable cartridge supports cleaning or replacement, and the listing specifies a 90-degree intake plus straight and angled outlet connectors.

Water-cooled motors and anti-airlock design are the defining combination in this YaeMarine pump, supporting long motor life and steady livewell flow. Its 800 GPH, 12V configuration also includes two outlet directions, giving boat owners flexibility when connecting a bait tank or livewell.

The 800 GPH rating provides the stated circulation capacity, and the 90-degree threaded intake is paired with both straight and 90-degree 3⁄4-inch hose-to-barb outlet connectors. That combination helps adapt hose routing without changing the listed intake style. The cartridge can be removed for cleaning or replacement, while the fully submersible pump and moisture-tight seals suit installation in wet marine locations. Tin-coated 16-gauge wire is specified, and applications include boat hulls, livewells, and bait tanks.

Skip it if you need a straight intake; the SEAFLO 04 Series lists one, while this YaeMarine’s outlet connectors provide routing choices instead.

This YaeMarine is suited to 12V boat livewells and bait tanks where 800 GPH flow, cartridge service, and outlet choices matter. Its intake is 90-degree, so account for that in the plumbing layout.

Listed on Amazon as: 12V 800gph Livewell Baitwell Pumps Live Bait Tank Aerator Live well Pump Submersible Cartridge Boat Bilge Pump

#5

5. SEAFLO 04 Series 800 GPH

• Dimensions: 5.35"L x 2.83"W x 9.29"H
• Weight: 15.8 oz
• Material: Polypropylene (PP)
• Voltage: 12 V DC

Best for: Straight-intake 800 GPH setups.

Why it ranks #5: This 800 GPH, 12-volt pump has a straight intake and replaceable cartridge motor, with supplied straight and 90-degree hose-barb connectors.

A straight intake distinguishes the SEAFLO 04 Series, while its 800 GPH rating supports circulation for a baitwell or livewell. The 12V DC pump is specified for freshwater and saltwater, making it an option for boaters who want this intake arrangement in either environment.

The 3⁄4-inch NPT outlet is accompanied by straight and 90-degree threaded hose-to-barb connectors, so the outlet route can be chosen around the boat’s plumbing. Supplied washers and two rubber gaskets support the installation, while the sealing nut is also included. Its 12V DC power specification suits a compatible boat electrical system. The listed model uses a replaceable cartridge motor, which gives owners a service-oriented option when the motor needs attention rather than treating the assembly as one fixed unit.

Skip it if you need a stated current draw before wiring; the SEAFLO 05 Series lists 4.0A, which gives a more explicit electrical reference.

Choose this SEAFLO if a straight intake and 800 GPH flow suit your livewell plumbing, and you value the listed replaceable cartridge motor. Its specifications do not provide a current-draw figure for electrical planning.

Listed on Amazon as: SEAFLO 04 Series 800 GPH Baitwell/Livewell Aerator Pump with Straight Intake, 12V DC, Saltwater/Freshwater, Replaceable Cartridge Motor, 3⁄4" NPT Outlet, CE & Rohs Certified – 4-Year Warranty!

#6

6. Attwood Tsunami T800

• Dimensions: 6.56"L x 10.69"W x 9.38"H
• Weight: 14.1 oz
• Material: Stainless Steel
• Voltage: 13.6 V

Best for: Higher-flow compact livewells.

Why it ranks #6: It provides 800 GPH at 13.6 volts or 750 GPH at 12 volts, with a 31⁄2-inch inlet and threaded 3⁄4-inch outlet.

The Attwood Tsunami T800 is rated for 800 GPH at 13.6V and 750 GPH at nominal 12V, giving buyers a clearly stated flow reference at both voltages. Its compact design is intended for contained spaces such as livewells, where installation room can be limited.

The two voltage-specific flow figures make capacity planning more precise: 800 GPH at the 13.6V design voltage or 750 GPH at nominal 12V. Its compact design is identified as suitable for contained spaces such as livewells, addressing installations with limited room. The threaded outlet measures 3⁄4 inch, and the 31⁄2-inch inlet and 29-inch wire are listed dimensions that help assess plumbing and wiring layout. A patented shaft seal is specified to prevent leaks caused by misalignment.

Skip it if you need 800 GPH at nominal 12V; the SEAFLO 05 Series lists 800 GPH at 12V DC.

This Tsunami T800 suits owners with a contained livewell space who can use its voltage-specific flow ratings to plan capacity. Its nominal 12V figure is 750 GPH, so match that to the desired circulation.

Listed on Amazon as: Attwood 4650-7 Tsunami T800 Aerator Pump, 800 GPH, 12-Volt, 3 1⁄2-Inch Long Inlet, Threaded 3⁄4-Inch Diameter Outlet, 29-Inch Wire

#7

7. T-H Marine 800 GPH Pump

• Dimensions: 11.6"L x 6.1"W x 3.23"H
• Material: Plastic
• Voltage: 13.6 V DC

Best for: Long-lead 800 GPH installations.

Why it ranks #7: The 800 GPH pump includes 30-inch lead wires and supports straight or angle mounting, though its listing identifies it as a thru-hull model.

A 30-inch lead wire is a practical differentiator on this T-H Marine pump, giving installers extra wiring reach as they set up an 800 GPH livewell system. Its 3⁄4-inch hose outlet and straight-or-angle mounting cap provide useful choices for adapting the installation to a boat layout.

The 800 GPH rating supports livewell circulation, while the 30-inch lead wire can help when the wiring connection is not close to the pump location. A 3⁄4-inch hose outlet matches the stated hose size, and dual-position mounting allows straight or angled positioning. The listing also specifies a corrosion-resistant removable cartridge and quiet operation, which address service access and operating conditions. The 13.6V DC specification is important when checking whether the boat’s electrical setup matches the pump.

Skip it if you need a pump specified for 12V; the SEAFLO 05 Series is listed at 12V DC and 800 GPH.

For boaters needing 800 GPH, a 30-inch lead, and straight-or-angle mounting, this T-H Marine pump offers setup flexibility. Check the 13.6V DC specification against the vessel’s electrical system.

Listed on Amazon as: T-H Marine 800 GPH Thru-Hull Livewell Pump – 3/4 Inch Hose Outlet Straight or Angle Mount Marine Livewell Pump with 30 Inch Lead Wires Corrosion-Resistant Removable Cartridge and Quiet Operation

#8 · Best Lower Flow

8. Attwood Tsunami MK2

• Weight: 11.2 oz
• Material: Plastic
• Voltage: 12 V DC

Best for: Tool-free service access.

Why it ranks #8: Its stated 500 GPH output suits buyers seeking less flow than the 800 GPH models, and it includes both straight and 90-degree outlets.

A one-hand cartridge release sets the Attwood Tsunami MK2 apart for service in tight spaces, letting owners access the cartridge without a two-handed maneuver. It includes straight and 90-degree outlets for flexible setup, and its listed 12V, 500 GPH configuration suits buyers whose flow needs match that rating.

The included straight and 90-degree outlets let the installer choose a hose direction that works with the boat’s layout. No sealant or tools are required for setup and maintenance, which can simplify installation and routine access. The one-hand cartridge release is specifically useful when working in tight spaces. This model is listed as a 12V, 500 GPH pump, so buyers can judge its capacity against their livewell needs rather than assume it matches higher-flow options.

Skip it if you need 800 GPH; the Attwood Tsunami T800 lists 750 GPH at nominal 12V, a better match for that flow target.

Choose the Tsunami MK2 when 500 GPH meets your aeration needs and tool-free service or one-hand cartridge access matters. Buyers needing higher listed flow should compare its capacity with their livewell requirements.

Listed on Amazon as: Attwood Tsunami MK2 Aerator Pump

#9

9. Rule 405FC 1100 GPH

• Dimensions: 10.25"L x 7"W x 3.25"H
• Weight: 4.8 oz
• Material: Plastic
• Voltage: 12 V

Best for: Thru-hull cartridge maintenance.

Why it ranks #9: The 1100 GPH rating and removable motor cartridge stand out, but its listing specifies a thru-hull application and tapered 3⁄4-inch NPT pickup.

The Rule 405FC combines an 1100 GPH rating with a removable motor cartridge, giving thru-hull livewell owners a way to service the motor while leaving fittings and hose intact. Its tapered 3⁄4-inch NPT pickup tube provides a defined connection size for planning the installation.

For thru-hull use, the tapered 3⁄4-inch NPT pickup tube supplies a specific intake connection reference. When the motor needs replacement, the cartridge can be changed while the fittings and hose remain in place, reducing the need to disturb the plumbing. The cartridge also gives access to the impeller for cleaning and maintenance. At 1100 GPH and 12V, this model offers a capacity between the 800 GPH pumps and the 1600 GPH Rule 209B in this roundup.

Skip it if you need 1600 GPH and larger connections; the Rule 209B lists that capacity with a 1-inch intake and 11⁄8-inch discharge.

This Rule suits thru-hull livewell owners seeking 1100 GPH flow and cartridge-based motor or impeller service. Its stated application and tapered 3⁄4-inch NPT pickup tube should match the planned plumbing.

Listed on Amazon as: Rule 405FC Livewell / Baitwell Pump, Tournament Series, Removable Motor Cartridge, 1100 GPH, 12 Volt

#10

10. Rule 209B 1600 GPH

• Dimensions: 9"L x 7"W x 7"H
• Weight: 4.6 lb
• Material: Plastic
• Voltage: 12 V DC

Best for: High-capacity tournament livewells.

Why it ranks #10: Its 1600 GPH capacity is the highest listed, but the 1-inch NPT intake and 11⁄8-inch discharge make it a poor match for this transom-focused search.

With a listed 1600 GPH capacity, the Rule 209B targets livewell setups that need substantially more flow than standard 800 GPH pumps. Its bronze base and anti-airlock feature add concrete construction and flow-management details for boaters selecting a 12V pump for demanding water circulation.

The 1600 GPH rating is the central fit consideration for a high-flow livewell, and the anti-airlock feature is specified to support operation without airlock interruptions. A bronze base and heavy-duty long-life motor are listed as construction features for the Tournament Series. Its 12V DC specification is relevant to electrical compatibility. The plumbing dimensions are also notably larger: a 1-inch NPT female intake and 11⁄8-inch discharge outlet, so the surrounding connections need to match those sizes.

Skip it if you need a 3⁄4-inch pickup tube and removable cartridge; the Rule 405FC lists both for its 1100 GPH thru-hull setup.

Choose the Rule 209B when a 12V livewell needs its listed 1600 GPH capacity and the plumbing can accommodate larger connections. Its 1-inch intake and 11⁄8-inch discharge are key layout constraints.

Listed on Amazon as: Rule 209B Marine 1600 Tournament Series Livewell Pump 1" NPT