What Is an Upflush Toilet, and When Does It Make Sense?

On this page (9 sections)

1. What is an upflush toilet?
2. How does an upflush toilet work?
3. When does an upflush toilet make sense?
4. How should you choose an upflush toilet?
5. Which upflush toilet system suits your project?
6. How do you set up and care for an upflush toilet?
7. What mistakes should you avoid?
8. How does an upflush toilet compare with a regular toilet?
9. Is an upflush toilet right for your project?

An upflush toilet moves waste through a discharge pipe with a powered macerator pump, so it can work where a gravity drain is difficult to add. It can suit a basement or a room far from the sewer connection, provided the pipe route, power, and fixture connections fit the system.

The pump usually sits behind or beside the toilet, or inside a self-contained unit. It reduces waste and pumps it toward the home’s drainage system.

What is an upflush toilet?

An upflush toilet uses a macerator and pump instead of relying only on gravity to move waste away from the bowl. The pump sends waste through a discharge line to a suitable connection in the home's drainage system.

“Upflush” describes the pump’s ability to move waste upward from below the sewer line. Depending on the system and route, it can also move waste horizontally within specified limits.

A standard toilet uses gravity and a larger drain line below the bowl. An upflush setup may avoid breaking concrete to add a floor drain, but it still needs a water supply, electrical power, a suitable waste connection, and a correctly planned pipe route.

How does an upflush toilet work?

Water from a flush activates the macerator pump, which breaks down waste and moves it through the discharge pipe. In a separate-pump setup, the toilet connects to a unit behind or beside it; a self-contained model combines the toilet and pump.

Some systems have extra inlets for a sink, shower, bath, or other drain. Those connections depend on the specific system, so plan the fixtures before choosing a model.

The pump does not make the rest of the plumbing optional. The installation still needs the right water supply, venting, electrical connection, and approved connection to the home's waste system.

When does an upflush toilet make sense?

Choose an upflush toilet when a conventional gravity drain would be impractical or costly to add. A basement below the sewer line or a room far from a soil stack are common situations to consider.

The main benefit is more flexibility in toilet placement. A smaller discharge line may reach an existing connection without a new floor drain, but the system’s lift and distance limits still control where it can go.

Measure the intended route, including bends, and compare it with the system’s stated limits. If you’re replacing an existing toilet, first check its drain position with our guide to measuring toilet rough-in.

An upflush system may also make sense when you want to add a bathroom to a space where floor excavation is difficult. It’s a poor fit if the required fixtures, route, power, or service access fall outside the system’s instructions.

How should you choose an upflush toilet?

Choose by the room’s plumbing route and fixture plan first, then compare the system style and toilet dimensions. A pump’s wattage alone does not tell you whether its inlets, connections, and installation method suit the project.

Check these items before buying:

• Lift and distance: Measure the vertical rise and horizontal run from the pump to the waste connection. Compare both with the system’s stated limits.
• Fixture connections: Confirm which extra drains the system accepts and how many inlets are available.
• Pipe route: Follow the required pipe diameter, fittings, and layout in the installation instructions.
• Power: Plan for an electrical supply that meets the system’s requirements.
• Physical fit: Check the toilet’s dimensions and leave space to reach the pump and connections for service.
• Installation method: Confirm how the unit attaches and seals to your floor.
• Local rules: Check plumbing requirements for the project and location.

If the plan includes a shower or bath, choose a system specifically designed to accept those drains. If you need only a toilet and sink, a half-bath model may be a more direct fit.

The toilet’s size and shape matter in a small room, too. Our guide to choosing a toilet covers the broader fit and style decisions.

Can you connect a sink or shower?

Connect a sink, shower, or bath only if the chosen system has the right inlets and supports those fixtures. A toilet-only setup may not handle gray water from other drains.

Some systems provide multiple inlets for bathroom fixtures, while a half-bath system may support only a sink connection. Lay out the pipe route and fixture connections before installation, following the system’s instructions.

Which upflush toilet system suits your project?

Match the system to the number of fixtures, room size, and installation route. These options cover a full-bathroom pump, basement layouts, and a compact half-bath.

Saniflo SaniPLUS Macerating Upflush Toilet Kit

The SaniPLUS is designed for a complete bathroom up to 15 ft below the sewer line or 150 ft from a soil stack. Its pump can connect to the toilet, a sink, shower, and bath.

Choose it when the project needs several bathroom fixtures connected to one system. Skip it if you need a self-contained toilet or if your route exceeds those limits.

Simple Project 600W Macerating Toilet System

The Simple Project system includes a round toilet, water tank, instructions, and a 600 W macerator pump. The toilet measures 28 in deep, 14.5 in wide, and 31 in high.

Consider it for a basement bathroom where gravity drainage is difficult and the dimensions fit the room. Its additional-fixture connections need to match your layout, so confirm the inlet configuration before planning around a sink or shower.

SUPERFLO 600W Macerating Toilet System

The SUPERFLO combines a one-piece toilet with a 600 W pump. It has one toilet inlet and two additional inlets for connections such as a sink, shower, bathtub, or laundry drain.

Its sealed floor-fitting method does not use traditional floor mounting bolts. Choose it if that installation style and the two extra inlets fit your project; skip it if you need a conventional bolted floor installation.

Saniflo Sanicompact Half-Bath Macerating Toilet

The Sanicompact is a self-contained macerating toilet designed for a half-bath. It supports installations up to 9 ft below the sewer line or 120 ft from a soil stack, and it can discharge sink gray water through a 1-1/4 in hose connection.

Its dimensions are 21.5 in deep, 14.5 in wide, and 18.5 in high. Choose it when a small toilet-and-sink layout is the goal; skip it if the plan includes a shower or bath.

How do you set up and care for an upflush toilet?

Follow the specific system’s instructions for its plumbing, electrical, and floor connections. A typical installation connects the toilet to the macerator, connects the toilet tank to the water supply, routes the discharge pipe to the waste connection, and supplies power to the pump.

A SaniPLUS setup has those four main connections, with optional connections for a sink, shower, or bath. Other systems use different arrangements, so use the instructions for the exact model and have a qualified plumber handle work outside your experience.

Before installation, check the pipe route, required clearances, outlet location, and access to the pump. Confirm that any optional fixture drains use the correct inlets and follow local plumbing rules.

For routine care, clean the porcelain with a mild detergent and follow the manufacturer’s instructions for the pump. Avoid flushing hard objects, paper towels, or wipes because they can damage the macerator.

What mistakes should you avoid?

The most common planning mistake is choosing a system before measuring the route and listing every fixture it must serve. A toilet may fit the room while its pump cannot reach the planned waste connection.

Avoid these errors:

• Ignoring the lift or run: Measure the full route and compare it with the system’s limits.
• Assuming all systems accept a shower: Verify every inlet and supported fixture before buying.
• Forgetting power: The pump needs electricity to move waste.
• Blocking service access: Keep the pump and connections reachable for inspection or repair.
• Treating it like a standard toilet: Follow the system’s care instructions and keep unsuitable items out of the bowl.
• Skipping local requirements: Confirm that the connection and installation meet local plumbing rules.

If an existing toilet needs to come out first, follow our guide to removing an old toilet before starting the replacement work.

How does an upflush toilet compare with a regular toilet?

A regular toilet is usually the simpler choice when a suitable gravity drain is already available. An upflush toilet is useful when adding that drain would be difficult, but it brings a pump, electrical needs, and system-specific installation requirements.

Consider the whole bathroom project, not just the toilet. If gravity drainage works and is practical, a conventional toilet may need less equipment; if it does not, an upflush system can make a remote or below-grade bathroom possible.

Is an upflush toilet right for your project?

Pick an upflush toilet when gravity drainage is hard to install and the pump route fits your room. Choose a full-bathroom system if you need several fixture connections, or a compact half-bath system if you need only a toilet and sink.

If an appropriate gravity drain is already easy to use, a conventional toilet is likely the more straightforward choice. Before buying an upflush toilet, verify the lift and distance limits, power requirements, permitted fixtures, and service access for the exact system.

Frequently asked questions

How does an upflush toilet work?

An upflush toilet sends waste into a macerator, where blades break it down before a pump moves it through a discharge pipe. The pump needs electrical power, and the route must follow the system's installation instructions.

The toilet also needs a water supply, proper venting, and a suitable connection to the home's waste system.

Can an upflush toilet go in a basement?

Yes, an upflush toilet can suit a basement where a gravity drain is below the sewer line, if the system's pumping limits and installation requirements fit the room. Check the vertical lift, horizontal distance, pipe route, power supply, and local plumbing rules before choosing a model.

Does an upflush toilet need electricity?

Yes, a macerating upflush toilet uses electricity to run its pump and cutting mechanism. Plan for an approved outlet near the unit and follow the manufacturer's electrical instructions.

A power outage can prevent the toilet from pumping waste, so consider how that affects the bathroom's use.

Can a sink or shower connect to an upflush toilet system?

Some macerating systems accept gray water from a sink, shower, or bath, while others are meant for a toilet alone or a half-bath. Check the system's inlets and installation instructions before planning extra fixtures.

Drain connections and permitted layouts vary by model.