A bilge pump with a built-in float switch automatically removes water when it reaches the pump’s activation level, without requiring a separate float switch. The SEAFLO 750 GPH model is best for setups using a 3/4-inch outlet, while the SEAFLO 1100 GPH and MAXZONE 1100 GPH models suit compatible 1-1/8-inch discharge systems. The 1100 GPH kit adds hose and a thru-hull fitting, and the NEWMAIX offers a 2000 GPH listed capacity. Match outlet size and electrical requirements to your boat before choosing.
| Product | Listed flow rate | Outlet | Best for |
|---|---|---|---|
| SEAFLO 06 Series 750 GPH | 750 GPH | 3/4 inch | Smaller outlet setups |
| Automatic 1100 GPH Pump Kit | 1100 GPH | 1-1/8 inch | Buyers needing hose and fitting |
| MAXZONE 1100 GPH | 1100 GPH | 1-1/8 inch | Standard 12V 1100 GPH replacement |
| SEAFLO 06 Series 1100 GPH | 1100 GPH | 1-1/8 inch | Buyers prioritizing listed warranty details |
| NEWMAIX 2000 GPH | 2000 GPH | Not specified | Buyers comparing higher listed capacity |
SEAFLO 06 Series 750 GPH
This 12V automatic submersible pump is best for a boat whose bilge plumbing uses a 3/4-inch outlet and whose needs fit a 750 GPH rating. Its integrated float switch turns the pump on at approximately 1.6 to 2.0 inches of water and switches it off as the level falls. That activation range makes the operating behavior more specific than products whose listing does not state a threshold.
Listed features include a five-blade impeller, a snap-off strainer, a 3-foot wire lead, and a maximum draw of 5.0A. The product also lists a four-year warranty. Choose this model if its outlet size matches the existing discharge setup. Avoid it if your system requires a 1-1/8-inch outlet; the smaller outlet is not a match for that plumbing.
Automatic 1100 GPH Pump Kit
This 12V kit is best for buyers replacing or equipping a 1100 GPH system with a 1-1/8-inch discharge hose. It includes a 6-foot marine-grade, thick-wall PVC hose and a thru-hull fitting, so those listed parts come with the pump. Its built-in float switch automatically starts and stops the pump based on water level, eliminating the need for a separate float switch.
The listing describes the hose as kink- and saltwater-resistant. A key limitation is compatibility: the product is not designed as a direct replacement for a 750 GPH setup and is not compatible with 3/4-inch systems. Choose it when the 1-1/8-inch hose connection is appropriate and the included installation parts are useful; do not select it solely by flow rate without checking the outlet.
MAXZONE 1100 GPH Automatic Pump
The MAXZONE is best for buyers seeking a compact 12V, 1100 GPH pump with an integrated float switch and a 1-1/8-inch hose connection. Its listed current is 3.8A, and its listed head is 3.0 meters. The outlet diameter is approximately 1.14 inches, also described as 1-1/8 inch, and the wire lead is listed as 1 meter.
Choose this model when those electrical and plumbing specifications fit the boat and a standalone pump is preferred over a kit with hose and fittings. The listing does not provide a warranty or a float-switch activation threshold, so buyers who need those details should confirm them before purchase. Its 1-1/8-inch outlet makes it a poor choice for a 3/4-inch discharge system unless the plumbing is changed appropriately.
SEAFLO 06 Series 1100 GPH
This SEAFLO model is best for buyers who need a 12V automatic pump rated at 1100 GPH and want a built-in switch rather than separate components. Its outlet is 1-1/8 inches, its listed current is 3.0A, and its maximum draw is 6.0A. It also has a 1-meter wire lead, a snap-off strainer, and a listed four-year warranty.
The all-in-one design is suited to new installations or retrofits where the outlet and wiring can be matched to the boat. Check the available discharge hose before choosing it: the 1-1/8-inch outlet does not match a 3/4-inch system. The listing does not specify the water level at which the float switch activates, so that behavior may need confirmation if activation height is a deciding factor.
NEWMAIX 2000 GPH Automatic Pump
The NEWMAIX is best for buyers comparing a higher listed flow rate: its product name specifies a 12V, 2000 GPH submersible pump with a built-in float switch. The listed features also describe marine-grade blocked wiring and quiet, low-vibration operation. Because the switch is integrated, a separate float switch is not required according to the product details.
The main limitation is that the supplied information does not state the outlet size, current draw, wire length, or switch activation level. Confirm those specifications and the plumbing fit before selecting it. Its 2000 GPH listing alone does not establish compatibility with a boat’s existing hose or electrical setup.
Buying Guide: How to Choose an Automatic Bilge Pump
Which outlet size should you match?
Start with the existing discharge hose or the pump being replaced. The products here include 3/4-inch and 1-1/8-inch outlets, which are not interchangeable by assumption. The 1100 GPH kit specifically says it does not fit 3/4-inch systems. Check the pump outlet, hose diameter, and connection requirements together before ordering.
How much flow capacity do you need?
Compare the listed gallons-per-hour rating with the system you are replacing and the requirements of your boat. The products range from 750 to 2000 GPH, but a larger number alone does not confirm that a pump is the right choice. Outlet size, wiring, current draw, and installation fit also matter. Use manufacturer guidance for your vessel when determining the needed capacity.
What electrical details should you check?
Confirm that the pump is intended for your boat’s voltage, then compare listed current draw, maximum draw, and wire-lead length with the installation. The SEAFLO 750 GPH lists a 5.0A maximum draw; the 1100 GPH SEAFLO lists 3.0A current and 6.0A maximum draw. Do not assume models with the same flow rating have identical electrical specifications.
Is a pump kit or pump-only model better?
A kit may be more convenient when its included hose and thru-hull fitting suit the installation. The 1100 GPH kit includes a 6-foot hose and fitting. A pump-only model may be preferable when the boat already has compatible plumbing or when specific components are needed. Verify what is included rather than assuming accessories come with every pump.
Frequently Asked Questions
What does a built-in float switch do?
It detects rising bilge water and automatically turns the pump on, then switches it off as the water level drops. Activation behavior varies; the SEAFLO 750 GPH listing specifies approximately 1.6 to 2.0 inches.
Do these pumps need a separate float switch?
The listed models have built-in float switches, and their product details describe automatic operation without a separate switch. Follow the product instructions for installation and wiring.
Can a 1-1/8-inch pump replace a 3/4-inch pump?
Not as a direct fit based on the information provided. Check hose and outlet compatibility; the 1100 GPH kit specifically excludes 3/4-inch systems.
Does a higher GPH rating guarantee a better pump?
No. Flow rating is only one selection factor. Match outlet size, voltage, electrical requirements, and installation details to the boat and its existing system.
Which product includes hose and a thru-hull fitting?
The 12V automatic 1100 GPH pump kit lists a 6-foot marine-grade hose and a thru-hull fitting. Confirm that its 1-1/8-inch outlet fits your setup.