The 8 Best Marine sump boxes (2023 reviews)

Attwood makes beautiful and great box with classic and smartly choosen materials. It uses a diaphragm pump instead of a centrifugal one mounted in the Attwood. It can handle inflow from the head sink, shower stall, and galley sink. It already has a screen in it to catch hair, etc. The float switch is contained in the unit, leaving more room in the box for water.

This system is quite a bit stronger, and the pump cleans up a lot quicker. It delivers outstanding performance for fast water flow into and out of the sump. It runs quiet, does not short cycle due to the larger container and still works great after a month. The inlet ports are pretty close together.

Why We Like This:

Easy to install, quiet, works perfectly
Clears the sump quick and quietly
Makes for a more modern looking bilge

Five Oceans Marine sump box

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Five Oceans has been making great box for years, thanks to a combination of clever design and appropriate materials. It's perfect replacement for a shower pump on a boat. There is an integrated float switch that senses water level around the pump, causing the pump to activate or shut off. It's so powerful that the pump empties the attached basin after a second or two of running. The 1.5 inch input is real tight next to the other outputs. The hose cutouts are close together if you have multiple inlets to your sump system.

The replacement pump with automatic float switch is readily available for about $ 30 so keeping the unit going will also be economical. It's quiet too, you can barely hear it over the water.

Why We Like This:

Great item to get rid of shower/tub water and no more stinky bilge water
Turns on when water level rises and shuts off when water is removed
Good brand reputation

SEAFLO Marine sump box

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We would, of course, be remiss if we didn't mention seaflo marine sump box for regular usage. The Seaflo shower sump is very easy to open. It is easy to install, nice fit and seal of top lid, and high capacity pump out. It has a rubeer gasket at the top and the spare ports are sealed so it should be water tight. It has multiple inlet ports for versatile usuage available in 750 gph (2838 lph) models in 12 volt versions. It comes with the pump and float switch. It allows easy cleaning and clear screw-down cover check valve on outlet and ignition protected handles waste water from more than one tapping points. The pump works very well.

Why We Like This:

High quality, 100% marine grade uv stabilised white abs plastic construction
Compact, full capacity automatic shower sump draining kit
New and hot release

KIMISS Marine sump box

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We know from years of feedback from readers, customers and amazon sellers, what most people want in a convenient and appropriate box. The kimiss marine sump box is exactly that - it's a simple box that hits all the right notes. It comes with ignition protection function, no need to worry about the unsecure factors when you start it. It has a builtin switch, which can automatically control according to the water level, no external float switch is required.

Why We Like This:

Tight fitting lid to mimimize splashing and odors
Built‑in check valve, which can prevent dirty water backflow to the bathtub and cabin
Transparent snap‑on cover with gasket seal and removable mesh filter for easy cleaning

Terisass Marine sump box

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If you often find yourself scrambling for convenient and suitable box, terisass marine sump box should be your first option for buying. It is a professionally manufactured 750gph shower sewage pump with built-in automatic float switch. It is designed to pump shower / sink water into the outboard or water storage tank. It has ignition protection, and a built-in check valve is installed on the outlet to prevent backflow.

It is only 3 amp (12v dc) and 1.6 a (24v dc), which is very energy-efficient. The removable mesh filter is easy to clean and brings you many conveniences. It is fits for attwood / for johnson / for rule footprints.

Why We Like This:

Good investment for long term
Good brand reputation

Aramox Marine sump box

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If you often find yourself confused about appropriate and satisfactory box, aramox marine sump box is your end point. The unit has multiple inlet port sizes for a variety of uses, to meet your different needs, meet your different needs, and meet your different needs. It is designed to pump shower/ sink water overboard or into a holding tank, stable and professional.

The Removable mesh filter allows easy cleaning, clear clip-on cover for easy access and cleaning, with gasket seals, bring much convenience for you.

Why We Like This:

Easy to install, fits for attwood/ for johnson/for rule footprints
Good investment for long term

Qiilu Marine sump box

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Qiilu offers a variety of box for personal choice and yet maintaining quality in all the variants. The shower sump pump is made of abs.100% brand new and high quality, high quality production gives you high quality guarantee. It comes with ignition protection function, no need to worry about the unsecure factors when you start it. It has a built?in switch, which can automatically control according to the water level, no external float switch is required. It is built to meet standard specification, strictly follow factory quality control. Good quality not only can provide a safer guarantee replacement for your life, but also good materials can increase product life.

Why We Like This:

Built?in check valve, which can prevent dirty water backflow to the bathtub and cabin
Transparent snap?on cover with gasket seal and removable mesh filter replacement for easy cleaning
New and hot release

Acouto Marine sump box

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The acouto marine sump box is the best desirable box on the market today. This shower sump pump systerm has multiple sizes of port connector, easy to operate. It has a builtin switch, which can automatically control according to the water level, no external float switch is required. It comes with ignition protection function, no need to worry about the unsecure factors when you start it. Boat Shower Pumps, Builtin check valve, which can prevent dirty water backflow to the bathtub and cabin.

Why We Like This: