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Adding a Basement Bathroom? What to Know Before You Buy

Adding a bathroom below an existing sewer line can be complicated. This guide explains how macerating and upflush systems work, what to compare, and when to consult a plumber before choosing equipment.

How an upflush bathroom works

01Bathroom fixtures

The toilet and approved additional fixtures feed wastewater into the system.

02Macerator pump

The powered unit processes waste and pumps it through a discharge line.

03Approved drain connection

Wastewater reaches the building's drainage system through code-compliant piping.

Conceptual flow only, not an installation diagram. Follow the exact manufacturer's instructions and local plumbing code.

Compare real Simple Project models

These are actual models listed by the manufacturer. Specifications are manufacturer-reported, not independently tested. Confirm current availability and installation compatibility before buying.

SNFLEX 600W macerating toilet with the pump and plumbing visible
TWO-PIECE SYSTEM

SNFLEX 600W Macerating Toilet

A two-piece option for projects where the stated pumping capacity and connections meet the layout.

Motor
600W
Claimed vertical lift
Up to 29 ft
Shop 600W upflush toilet →
SNFLEX one-piece upflush toilet shown in full
ONE-PIECE SYSTEM

SNFLEX 600W One-Piece Toilet

Consider if you prefer the one-piece toilet design. Verify space for the pump and service access.

Motor
600W
Design
One-piece toilet
Shop one-piece macerating toilet →
SNFLEX 750W upflush toilet with external macerator pump and discharge pipe
HIGHER-POWER SYSTEM

SNFLEX 750W Upflush Toilet

Worth comparing for longer discharge routes, subject to the full manufacturer specifications.

Motor
750W
Claimed vertical lift
Up to 36 ft
Shop SNFLEX 750W Upflush Toilet →

Photos load directly from the manufacturer’s public product data when available; if unavailable, the photo area links to the official listing rather than displaying an unrelated image. Confirm image reuse rights with the advertiser. The two 600W product buttons use Buy Better Finds Awin tracking links. The 750W product button uses the supplied Awin deep link to its exact manufacturer product page.

What is a macerating toilet?

A macerating toilet system uses a powered unit to break down waste and pump wastewater through a discharge line. Some systems can serve a toilet and additional fixtures, depending on the specific model. It may be an alternative to breaking up a concrete floor to install a conventional gravity-drain bathroom, but suitability depends on the home's plumbing layout and local code.

When does an upflush system make sense?

These systems are often considered for basement bathrooms, renovations where the main drain is higher than the proposed fixtures, and locations where gravity drainage is impractical. They still require suitable water supply, venting, electricity, discharge routing, and an approved connection to the drainage system.

Six things to compare before purchasing

  1. Vertical lift and horizontal discharge: Check the manufacturer's rated pumping distances and the actual pipe route; bends and fittings may affect performance.
  2. Supported fixtures: Verify whether the unit handles only a toilet or can also connect to a sink or shower.
  3. Venting and code compliance: Follow manufacturer instructions and local plumbing requirements. Do not assume a system can operate without a vent.
  4. Electrical requirements: Confirm outlet location, circuit and protection requirements, and how the system behaves during a power outage.
  5. Access and maintenance: Leave room for service, and review cleaning instructions, replacement parts, warranty, and support.
  6. Total installed cost: Compare the toilet system, plumbing materials, labor, electrical work, permits, and any necessary framing or finish repairs.

Macerating toilet vs. conventional basement plumbing

Macerating / upflush system

Can reduce the need for extensive floor excavation in suitable layouts. Requires a pump, electricity, correct discharge routing, and periodic maintenance.

Conventional gravity drainage

May be simpler to maintain once installed, but can require substantial excavation or changes to the drainage system if the fixtures sit below the sewer connection.

Considering Simple Project?

Simple Project is one brand to investigate when comparing macerating toilet systems. Before buying, verify the exact model's lift rating, fixture connections, venting instructions, electrical requirements, warranty, and whether your installer considers it appropriate for the planned bathroom. We have not independently tested a Simple Project system, so this guide does not assign it a product score or claim it is the best option.

FEATURED MERCHANT PRODUCT

Simple Project 600W Upflush Toilet

The advertiser describes this model as a 600W upflush toilet with a waste-grinding and pumping system. Confirm the exact product specifications, dimensions, supported fixtures, and installation requirements on the merchant page before purchasing.

View Simple Project 600W Upflush Toilet →

Affiliate link · Merchant pricing and availability may change.

OTHER BATHROOM OPTIONS

Simple Project 21-Inch Tall Toilet

This floor-mounted, two-piece toilet is advertised with a 21-inch height and single-flush operation. A taller toilet may be useful for some shoppers, but comfort, accessibility requirements, bathroom dimensions, and installation compatibility should be checked before purchasing. This is a conventional toilet option, not a substitute for an upflush pump system.

View the 21-Inch Tall Toilet →

Affiliate link · Verify product specifications with the merchant.

Explore more Simple Project bathroom products

Browse the merchant's selection to compare other toilets and bathroom fixtures. Check product details, prices, return policies, and warranty terms before ordering.

Browse Simple Project →

Important: Plumbing and electrical work may require permits and licensed professionals. Confirm requirements with your local authority and a qualified installer.

Questions to ask your plumber

  • Where is the nearest suitable drain connection, and how high is it?
  • What venting and discharge pipe arrangement is permitted?
  • Can the chosen unit support every planned fixture?
  • Where will the system be accessible for service?
  • What is the estimated installed cost versus a conventional drain?

Affiliate disclosure: Buy Better Finds may earn a commission when you purchase through qualifying links on our website. The Simple Project product and storefront links above are affiliate links.

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