7 Best Macerator (Upflush) Toilet Pump Systems for your RV, Boat & more

One of the most apparent concerns is how to empty the holding tanks in your RV and sailboat on a trip.

Using the best macerator toilet pump system will help you overcome such hurdles. And it also avoids blockages in your black tank wastewater systems,  giving you a toilet on the go.

If you need help picking which toilet pump system is perfect for your ride, read on, and you’ll surely find the answer.

What is a Macerator Toilet Pump? [Brief History]

Upflush toilets, also known as macerating ones, are not new in the industry. For the past decades, Europeans, in particular, have been accustomed to this system.

Saniflo, a world-renowned manufacturer of the best upflush toilet pump systems, invented the first unit in Western Europe in 1958. Over the recent decade, it has also become more prevalent in North American households. It became pretty popular among RV owners as well as conventional American householders. The appeal stems from installing this type in unusual areas such as a basement or producing a temporary commode for renters, RVs, or yachts, or sailboats.

Furthermore, it became famous in household applications, primarily due to the flexibility for changing the layout of bathrooms and kitchens to different rooms. This is attributed mainly to the proper disposal of toilet paper and other such waste created in daily life activities.  Proper waste disposal from level to ground level sewers is also expected to generate substantial demand for the macerating system throughout the estimated period.

So, what exactly is it?

It is a system installed in or near a toilet that acts as a mixer, grinding up toilet waste to be pushed via a conduit with a smaller diameter than typical. This allows toilets to be built in locations where they would not otherwise be possible. Toilets are not entirely dependent on gravity flow because of the presence of a pumping mechanism. Furthermore, the alternatives for routing the pipes are expanded. They can even be fitted below the level of the sewage in a cellar, for example.

How does it work?

In a sewage system, it breaks up larger chunks of black water into a slurry and will keep anything from clogging and allow microbial activity to quickly break down wastewater. It is initially found in sewage treatment plants. It can, however, be used if it is impractical to install another toilet in your home and expect it to run by gravity. The toilet will flush to a tank near the second toilet, usually behind it. The pump will then turn the solids into a slurry, pour them into the ordinary sewage drains via a tiny diameter pipe.

This may also be seen in a ship, where it is frequently paired with creating a vacuum for emptying the bathroom lines, as is the case with most cruise ships manufactured nowadays. The pump used in a domestic home may also function in a vacuum, which would be the ideal option if you want more than one extra bathroom, such as in a home transformed into a guest house or small hotel. Modern RVs feature upflush units, which feel more like using a residential household toilet. It solely employs gravity to discharge waste into the black tank when a button is pressed.

Choosing the correct type of upflush toilet is simple, given the abundance of available models. Here are our top picks;

1. Saniflo 023 Sanicompact – best compact design

Do you want to install a bathroom but lack sufficient space and funds? There is no need to worry; the redesigned Sanicompact dual-flush system with a built-in macerator for half-bathroom applications is what you are looking for. Take advantage of the space where you never thought it possible to add a bathroom that you’ve always wanted.

Saniflo 023
255 Reviews
Saniflo 023
For any space that requires a compact build, here's the one we recommend.

Saniflo has been the original plumbing solution since 1958. The world’s trusted and tested brand in the industry today.

The Sanicompact system can be installed in any space where a gravity drain is not possible. It can easily be secured to the floor using the mounting hardware provided. Connecting a sink to it is also simple using the rubber hose provided.

It can discharge up to 9 feet vertically or 120 feet across once installed. It works on the same principle as a regular gravity toilet system. The trap channel is filled with water to prevent smells from escaping. It also has a dual-flush push button to reduce the amount of water used each flush from 1.28 gallons to a water-saving 1 gallon per flush. When the button is pressed, an electrical signal is sent to the circuit board positioned at the rear of the motor housing.

Overall, it is a self-contained, compact system that is suitable for small places and incredibly water-efficient and user-friendly. This model of upflush toilet is less costly than others. As a result, this is ideal for consumers on a tight budget. Despite its modest price, it maintains the qualities of an excellent upflush system.


  • Ideal for tight spaces
  • Allows connection for sink
  • Conserves water
  • Durable porcelain housing
  • Elongated shape
  • Easy to install, adjustable
  • Floor-mounted type
  • Simple design


  • A little higher for short persons
  • Very fragile material

2. Liberty Pumps ASCENTII-EW (B008ESHC6K) – best durable option

It has a high price tag, but it is well worth it if you want a toilet that lasts for a long time. It has cutting-edge RazorCut technology for optimal waste maceration and overall effectiveness.

Liberty Pumps
113 Reviews
Liberty Pumps
We really like the removable service panel which has a bunch of benefits when it comes to plumbing and potential maintenance.

With a 1.2 gallon per flush rating, it is WaterSense certified. It aids in the reduction of water wastage as well as the monthly cost of your water bill. It requires 1.9v batteries, but with a runtime of 3.5 hours, you don’t have to think about changing them out too frequently. This elongated toilet seat truly gives you more room and comfort.

This model is capable of pumping water from the sink next to the bowl. It is simple to set up and clean, and it has a silent, gradual closing lid. This item, like other versions of upflush toilets, is, nevertheless, pricey.


  • With advanced RazorCut technology
  • WaterSense certified
  • 3,5 hours runtime
  • Perfect for below-grade bathrooms
  • 1.28 GPF macerating efficiency


  • Terrible with toilet paper
  • When the paper gets stuck on the sensor, the pump won’t shut off.

3. Jabsco 37245 Electric unit – best quiet flush option

This model has an incredibly silent flush cycle as well as the functionality of a typical family toilet. It is a fantastic option since it works in any size or shape of a room. It has a single-button flush actuator and a dual-function water level control switch.

In terms of style, it comes with a Par Max 4 self-priming pump that rinses the bowl only with high-quality seawater or lake water. It is available in a very compact form to accommodate any little room or a half bath.

15 Reviews
For marine purposes, you can't go wrong with this model from Jabsco. It doesn't quite have the design of other models, but we like its price tag.

The high-capacity waste macerator and bolt discharge pump were also enhanced for maximum performance at a low cost. For convenience, the push-button activates both the rinse water supply and the discharge pump simultaneously. The scavenger pump grinds and flushes at an astonishingly quick rate. In addition, the stainless steel design keeps mold and mildew at bay.


  • Ultra-quiet flush cycle
  • Activates rinse water supply and discharge pump with a single button
  • With an additional rocker switch for control management
  • Minimizes water use
  • Available in a compact size
  • High-capacity waste macerator and discharge pump


  • Poorly designed switches according to some users

4. Silent Venus White Upflush Toilet – best upflush system for a basement

This upflush system can convey slurry 19 feet vertically and over 200 feet horizontally to your sewage line. It is simple to install and does not require any construction or re-piping. It is super-quiet, registering only 39 dB.

Silent Venus
142 Reviews
Silent Venus
If you're a person who wakes up in the middle of the night, having a unit that operates at 39 dB can be what saves your marriage!

The system weighs only 12.2 pounds and measures 24x14x16 inches, making it versatile and adaptable to any location. Aside from that, it liquefies waste with a powerful electric pump and a steel cutting blade. With a 0.5 HP motor, it could also remove greywater from sinks, tubs, and showers. The best part is that it is water-efficient.


  • A two-piece toilet size
  • Item dimension 24x14x16 inches
  • Item weight 114.7 lb
  • Ability to be installed without any major construction
  • No venting required
  • No underfloor plumbing
  • No digging for sewer lines


  • No instructions in the box
  • The pump is a little bit noisy

5. Saniflo SaniPLUS – best upflush kit

This upflush toilet kit is more feature-rich than its peers. The clean white tone complements the decor of your bathroom. It only requires 1.6 GPF, which is a significant advantage in water-stressed areas, making it ideal for anybody looking to reduce their water expenses. Another notable characteristic of the product is its elongated design, white tank, macerating bathroom tank, and stainless steel used to avoid bacteria and mildews.

38 Reviews
There's no doubt that the SaniPLUS is an upgraded model. With 1.6 GPF, it's a great system if you're short on water.

The main benefit is that it may be installed 15 feet below the sewage line. It uses less water while providing high-quality sanitation. The model is pricey, but the quality deserves the cost.


  • Stainless steel construction
  • Conserve water consumption with 1.6-gal per flush
  • Easy to install and adjustable with just 4 connections
  • The motor is sealed in an oil-filled enclosure
  • Optimum blade rotation at 3600 RPM
  • Ability to discharge gray wastewater from different sanitary fixtures


  • High-priced

6. Five Oceans TMC (B01GIN6WNG) – best RV electric toilet for the money

If you are looking for a system ideal for RVs, this is the best pick. The Five Oceans has a great deal of knowledge in the maritime and camping industries.

To macerate wastes and pump them into the tank, the TMC employs a high-capacity scavenger pump. It has an easy-to-clean slow-closing seat, a push-button flush, and china bowl features.

Five Oceans TMC
19 Reviews
Five Oceans TMC
Whenever you're stocking your RV, you'll want smaller appliances and devices. The Five Oceans TMC is great for that specific purpose!

It’s also lightweight and compact and will fit well in your RV. At half the price of some of the more expensive brands, the price is competitive. The dimensions are 14.5×17.5×13 inches, which are ideal for a typical RV or boat.

This is specifically built for the maritime sector. The high-capacity scavenger pump and macerator crush the wastes and flush them into the septic tank. When compared to other popular models, this model offers excellent value for money.


  • High-capacity macerator pump
  • Slow closing lid
  • With smart flush control panel switch
  • Comes with complete accessories for easy installation
  • With dual-function pump
  • Vitreous china bowl material


  • Must be installed near to the water source
  • The pump inlet should not be more than 25” above water level.

7. Flojet 1855-000A Waste Pump (B001HKZHIW)- best portable option for RV

The Flojet 18555 Portable RV Waste Pump makes the draining of your RV waste tanks a breeze.

Flojet 1855-000A
2,343 Reviews
Flojet 1855-000A
Looking for a portable pump? Make sure to take a look at the Flojet 1855-000A!

It comes with a convenient, durable carrying bag to keep the device secure and compactly stowed when not in use. It operates on a 12-volt direct current and neatly processes black and grey water from holding tanks using a strong self-priming macerator pump. This is an excellent way to empty holding tanks on recreational vehicles quickly.


  • Self-priming pump section
  • Run-dry protection up to 30 seconds
  • 12v DC permanent magnet-type motor
  • Stainless steel cutter
  • 12x13x5.5 dimension
  • Handles hard objects, sanitary napkins, rags


  • Won’t last long compared to top units

Installation instructions

A macerating toilet can be utilized to provide a good toilet in an uncommon location such as RVs, motorboats, and a basement. This is linked to a macerator mechanism, which pushes waste via an output pipe after being ground up with stainless steel blades. Because it goes underneath the toilet and links to piping that delivers waste up to and through a central plumbing system, it should be fixed first.

The installation of such units differ from regular toilets, so let me show you how to do it:

Step 1: Place the system behind the location. It must connect to the back.

Step 2: Connect the discharge pipe to the drain pipe. The discharge pipe can feed into a piping system and link to the black tank to dispose of waste. Place the unit’s discharge adapter onto the discharge pipe and its output port located at the top of the unit to connect them. Tighten the discharge adapter using the nut driver to ensure its stability. A gate valve on the discharge pipe near the macerator’s exit is required. This will be useful if the macerator has to be fixed. The macerating propeller is in charge of holding the waste in the vertical course of the discharge line.

Step 3: For ventilation, connect the unit to an existing vent stack using a PVC vent pipe. Before connecting the PVC piping to the vent stack and unit, apply PVC pipe priming and cement. If an existing vent stack is unreachable, a new vent line can be laid.

Step 4: Set the toilet in the desired location. Mark the mounting holes on the floor to ensure the correct position.

Step 5: Move the toilet and begin drilling guide holes in the floor that have been designated.

Step 6: To fix the toilet in place over the holes, use brass screws.

Step 7: Using a gasket connector, link the new system to the back of the toilet. Tighten the stainless steel clamp using the nut driver to secure the connection.

Step 8: Attach the toilet to the water supply line, then turn on the water valve.

Step 9: Connect the system to an outlet, then it is ready to go.

Before Choosing, What Do You Need to Look At?

When deciding on the best unit to add to your ride for a trip, consider some crucial factors as follow:

  1. The toilet’s capability is the maximum depth from which it can up flush discharge smoothly and efficiently
  2. Distance supported
  3. Fully sealed motor
  4. Steel macerator blades

How Much Does it Cost to Install the System?

The device itself will cost several hundred dollars or more than a thousand for the top units, which is significantly more than the cost of a standard toilet. Accessories and fittings are an upfront cost since you still need an outlet to dispose of the trash, which requires drilling a hole in the wall and connecting it to a separate outlet. There are also electrical outlets required.

Labor fees are also considered. How much would a plumber charge in comparison to a standard installation? Depending on their knowledge, you may also require the services of an electrician. No one can indeed provide a price without seeing the project and what’s involved, but it would be in the hundreds. Nonetheless, the unit is a one-time expense that delivers long-term comfort and peace of mind.

When and Where to Use it?

There are a few reasons where you might use it. Suppose you have a bathroom in your basement below the level of your primary drain/sewage pipe. In that case, you will need this system to pump effluent up to your drain system. The macerator toilet is equipped with a tank and a pump. When it is flushed, the liquid enters the tank. It is mixed with the particles by a specifically built macerator pump before being pumped out.

Another reason you might need an MT is if you’re remodeling and installing a bathroom in a location where traditional drain waste venting is impossible or prohibitively expensive. The wastewater can be piped horizontally or vertically to a draining stack.

Because its aim is primarily to grind the waste into smaller particles to flow more quickly through the waste system. It is more commonly utilized in systems that collect garbage in a lower area, such as a basement, and then pump it up to the sewage system at street level. This is usually positioned at the collection point rather than in the bathroom because it is loud and requires a flow to function correctly.

On a boat, it’s a smaller version of how it operates on a ship. There are several methods for getting black water to the macerator stage of a sewage treatment plant, depending on whether it is done by gravity or suction.

Advantages of Using the System

Maceration is the process of reducing a bulk substance or component to tiny particles, allowing for more effortless movement and processing. A periodic accumulation of solid to semi-solid waste in sewer and discharge pipelines frequently leads to pipe choking or blockage. This problem has been common in span from the pipe material regularly. Then so, outfitting the system keeps the pumping components in good working order by shielding them from scraps, fibers, and hard wastes.

Therefore, the system offers several benefits with just a few negatives, such as their noise when being used. As a result of the numerous benefits outweighing the few downsides, the unit’s public and household pipeline and drainage systems are expected to improve. Meaning, it aids in the reduction of real issues caused by the formation of solid particles in pumps and pipes.

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