A shower sump pump box collects wastewater from a boat or RV shower and pumps it to an overboard discharge or holding tank. The right choice depends on more than flow rate: check the pump’s voltage, inlet and outlet sizes, automatic controls, and whether its fittings match your plumbing. Here are five options, with the key differences to consider before you buy.
Table of Contents
Quick Comparison
| Product | Voltage | Flow rate | Notable features |
|---|---|---|---|
| NovelBee 12V Boat Shower Sump Pump Box | 12V DC | 750 GPH | Built-in automatic float switch; multiple inlet ports |
| NovelBee 12V Marine Shower Sump Pump Box | 12V DC | 750 GPH | Check valve; several listed inlet sizes |
| Zuomeng 12V Automatic Shower Sump Pump Box | 12V DC | 750 GPH | Strainer; three hose adapters; dual inlets |
| BORDSTRACT 12V/24V Shower Sump Pump Box | 12V or 24V DC | 750 GPH | Automatic float switch; clear cover; removable mesh filter |
| Tomotato 24V 600GPH Shower Sump Pump Box | 24V DC | 600 GPH | Multi-inlet design; automatic drainage |
Our Picks: Best Shower Sump Pump Box reviews
1. NovelBee 12V Boat Shower Sump Pump Box: A Straightforward 750 GPH Option
This NovelBee sump box is a 12V DC marine pump rated for up to 750 gallons per hour. Its built-in float switch is designed to turn the pump on as water collects and off as the level drops, so you do not have to operate it manually during normal drainage.
The listing describes multiple inlet ports but does not provide their sizes in the supplied details. That makes it important to check the product listing and measure your hose connections before ordering. The pump draws 3 amps, and the stated duty cycle is for intermittent use in 30-minute intervals. It is intended for shower or sink water without large particles or waste, not solid debris.
Compared with the second NovelBee option, this model has fewer connection details listed and does not mention an outlet check valve. It may suit a simpler 12V setup where the existing plumbing is compatible, but shoppers who need specific adapters or backflow protection may prefer a more fully specified option.
Pros:
- 750 GPH stated flow rate
- Built-in automatic float switch
- 12V DC operation with a stated 3-amp draw
- Can handle shower or sink water without large particles
Cons:
- Inlet sizes are not specified in the supplied details
- Designed for intermittent use, not continuous operation
Verdict: Choose this NovelBee model if you need a basic 12V automatic sump box and confirm its port sizes will work with your plumbing.
2. NovelBee 12V Sump Box with Multiple Fitting Sizes and a Check Valve
This 12V NovelBee model is also rated at 750 GPH and uses an integrated float switch for automatic operation. Its listed inlet connections cover 3/4-inch, 1-inch, 1-1/8-inch, and 1-1/2-inch sizes. The outlet is listed as 3/4 inch, giving you more connection information to compare against your existing hoses than the first NovelBee option provides.
A check valve on the outlet is designed to help stop water from flowing back into the tank. That can be useful in a setup where backflow is a concern, though it does not remove the need to install and maintain the system correctly. Like the other NovelBee model, it is described for intermittent use in 30-minute intervals and for water without large particles or waste.
This is a practical choice if hose compatibility and backflow control matter to you. Before buying, verify the supplied ports and fittings against your actual hose sizes; the product description lists several inlet sizes, but you should confirm which adapters are included and how your plumbing will connect.
Pros:
- 750 GPH stated flow rate with automatic float switch
- Several inlet sizes are listed
- Outlet check valve helps prevent water from flowing back into the tank
- Suitable for shower or sink water without large particles
Cons:
- 12V DC only, so it will not suit a 24V-only setup
- Specified for intermittent use rather than continuous running
Verdict: This NovelBee is the better fit of the two NovelBee choices if its listed port sizes match your plumbing and you want an outlet check valve.
3. Zuomeng 12V Sump Pump with a Strainer and Three Hose Adapters
The Zuomeng is a 12V automatic shower sump pump rated at 750 GPH. Its built-in float switch is designed to start and stop the pump based on the water level. The product description also states a maximum lift height of 10 feet, a useful specification to compare with the vertical distance and discharge route in your installation.
For plumbing flexibility, it comes with three removable adapters for 3/4-inch, 1-inch, and 1-1/8-inch hoses, along with two plugs for unused ports. Its dual-inlet design can connect two drain sources, such as a shower and sink. A threaded inline strainer is intended to catch hair, soap scum, and debris before they reach the pump, while a built-in check valve is designed to reduce backflow.
The box is described as having a transparent snap-on lid for inspection and cleaning. That combination of adapters, strainer, and access features makes it one of the more detailed options here for a multi-source drainage setup. Keep in mind that a strainer still needs cleaning, and the listed 750 GPH capacity should not be treated as a guarantee of the same flow in every installed system.
Pros:
- 750 GPH stated capacity and 10-foot maximum lift height
- Three hose adapters and two plugs for unused ports
- Dual inlets, threaded strainer, and built-in check valve
- Transparent lid is designed to make inspection easier
Cons:
- Strainer requires periodic cleaning to remove trapped debris
- 12V DC operation may not match a 24V system
Verdict: Pick the Zuomeng if you want a 12V model with two inlets, specified hose adapters, and an accessible strainer.
4. BORDSTRACT 12V/24V Pump Box with a Clear Cover and Mesh Filter
The BORDSTRACT box is listed for both 12V and 24V DC systems, with a stated flow rate of 750 GPH. Its automatic float switch is designed to respond to the water level. The description gives current draws of 3 amps at 12V and 1.6 amps at 24V, and lists fuse currents of 5 amps and 3 amps, respectively.
For maintenance access, it has a clear clip-on cover and removable mesh filter. The listed inlet range runs from 3/4 inch to 1-1/2 inches, giving it a broad range of connection sizes. The product description says it can handle water from a shower, sink, bilge, or rainwater and is designed to discharge overboard or to a holding tank.
Its dual-voltage support stands out against the 12V-only options in this group. However, the supplied product information marks this listing as unavailable, so check the Amazon page before making it your choice. Confirm the voltage setting, fittings, and included connections for your setup as well.
Pros:
- Listed for 12V or 24V DC systems
- 750 GPH stated flow rate with automatic float switch
- Clear cover and removable mesh filter aid access and cleaning
- Multiple inlet sizes are listed
Cons:
- The supplied product information marks the listing unavailable
- Verify the correct voltage and compatible fittings before installation
Verdict: Consider the BORDSTRACT if you need its listed dual-voltage flexibility and the listing is available, but confirm the current product details before buying.
5. Tomotato 24V 600GPH Sump Pump for a Lower-Flow Setup
This Tomotato sump box is rated for 24V DC and a flow capacity of up to 600 GPH. It is described as an automatic drainage system for marine or RV shower areas, with a multi-inlet design for connecting more than one water source, such as a shower or sink.
The product information describes a plastic housing intended for wet marine conditions, but it does not give specific inlet sizes, current draw, lift height, or details about the automatic control mechanism. Those missing specifications make it especially important to compare the listing with your electrical and plumbing requirements before ordering.
At 600 GPH, its stated capacity is lower than the 750 GPH options in this roundup. That does not by itself determine whether it will work for your installation, but it gives you a clear point of comparison. This model is most relevant if your system uses 24V and the listed multi-inlet design suits your drains.
Pros:
- Designed for 24V DC systems
- 600 GPH stated capacity
- Multi-inlet design for more than one water source
- Automatic drainage feature is listed
Cons:
- Lower stated flow rate than the 750 GPH models here
- Supplied details do not specify inlet sizes, current draw, or lift height
Verdict: Choose the Tomotato only if you need a 24V unit and its 600 GPH capacity and connection details meet your system’s needs.
How to Choose a Shower Sump Pump Box
Match the Pump Voltage to Your Electrical System
Start with your boat or RV’s available DC voltage. Several options here are 12V, while the Tomotato is listed as 24V and the BORDSTRACT is listed for both 12V and 24V. A pump with the wrong voltage is not a suitable match. Check the product listing and follow its wiring and fuse instructions rather than assuming a model can be adapted.
Compare Flow Rate with Your Drainage Needs
The products in this guide list capacities from 600 to 750 gallons per hour. Treat that figure as a product specification, not a promise of the exact flow you will get after installation. Hose routing, lift height, and the rest of your plumbing setup matter. The Zuomeng listing gives a maximum lift height of 10 feet; the other supplied descriptions do not state a lift figure.
Check Inlet and Outlet Sizes
Measure your existing hoses and compare them with the pump’s ports and supplied adapters. The second NovelBee lists several inlet sizes and a 3/4-inch outlet, while the Zuomeng includes adapters for three hose sizes and two plugs for unused ports. Other product descriptions provide less connection detail, so verify what is included before you buy.
Consider Automatic Controls and Backflow Protection
A built-in float switch can start and stop a pump as the water level changes, reducing the need for manual operation. Several products explicitly list an automatic float switch, while the Tomotato description says it has automatic drainage without detailing the control mechanism. If backflow is a concern, look for an explicitly listed check valve, such as those described for the second NovelBee and Zuomeng models.
Think About Hair, Soap, and Routine Cleaning
Shower water can carry hair and soap residue. A strainer or mesh filter can catch some debris before it reaches the pump, but it also needs to be inspected and cleaned. The Zuomeng lists a threaded inline strainer, and the BORDSTRACT lists a removable mesh filter. A clear or accessible lid can make it easier to inspect the box, but does not eliminate routine maintenance.
Respect Duty-Cycle and Water-Use Limits
The two NovelBee listings specify intermittent use in 30-minute intervals and say the pumps are not for water with large particles or waste. Do not assume that every model has the same duty-cycle limits; check the full product instructions for the option you choose. Use the pump for the type of water and operating pattern it is designed to handle.
Frequently Asked Questions
What does a shower sump pump box do?
It collects shower or compatible sink water and uses a pump to move it to a discharge point, such as overboard or into a holding tank. The exact connections and permitted uses depend on the model.
Do I need a 12V or 24V pump?
Choose a pump that matches your electrical system. Most options here are listed as 12V DC, while the Tomotato is 24V DC and the BORDSTRACT is listed for 12V or 24V. Confirm the correct setup in the product instructions before installation.
Is a higher GPH rating always better?
Not necessarily. A higher stated capacity can be useful, but your plumbing layout, hose size, and vertical lift also affect performance. Match the pump to your installation rather than choosing by flow rate alone.
Can I connect both a shower and a sink?
Some models are described with multiple inlets or a dual-inlet design. Check the number and size of ports, along with any included adapters and plugs, to confirm that the pump can connect to your specific drains.
Does a built-in float switch mean the pump needs no attention?
No. An automatic float switch can control on-and-off operation as the water level changes, but the box and any filter or strainer still need inspection and cleaning. Follow the product’s care and installation instructions.
Can these pumps handle food waste or large debris?
The NovelBee descriptions specifically say the pump is for water without large particles or waste. Do not send solids or unsuitable waste into a sump pump unless the product instructions clearly say it can handle them.
Final Recommendation
For a 12V setup where connection flexibility and a listed outlet check valve matter, the NovelBee 12V 750GPH Marine Shower Sump Pump Box is a strong place to start. The Zuomeng is a good alternative if you want specified hose adapters, dual inlets, and a strainer. If your system is 24V, compare the Tomotato’s 600 GPH rating and limited supplied connection details with the BORDSTRACT’s dual-voltage listing, and confirm availability before choosing. In every case, verify voltage, port fit, and installation requirements against your own plumbing and electrical system.
