Why Installers Choose Grundfos Sololift2 Macerators

Published: 08 Jun 2026 ・ Read time: 5 Mins

Many installers know the scenario. You arrive on-site to price up a domestic renovation, and the homeowner says: “We want to put an en-suite under the stairs,” or “We’re turning the basement into a self-contained studio.” Then they point to a spot far from the property’s existing soil stack, below the main sewer line, or boxed in by solid concrete floors.

Previously, this would have meant bad news: massive structural disassembly, excavation, or drilling through exterior walls for gravity drains. On the other hand, the alternative would have been installing a faulty macerator system, which ultimately would have caused problems a few months after installation, thus requiring an urgent service call.

However, now you don’t have to tell the customer "no" or inherit a maintenance nightmare. The Grundfos Sololift2 range of compact lifting stations, available across the City Plumbing branch network, is a game changer. These units are engineered to pump wastewater up and away from domestic sanitary appliances, independent of standard gravity drainage.

The Sololift2 Range From Grundfos - 5 Models, Zero Fuss: The Counter-Guide

You don't need to overcomplicate your inventory or waste time scratching your head over a catalogue. Grundfos has stripped the Sololift2 range down to five smart, highly targeted units that make it easier to match the right solution to every domestic application:

Sololift2 WC-1 (Standard WC + 1 Basin): Features a compact footprint designed for standard behind-toilet fits and a professional-grade, heavy-duty cutter system.
Sololift2 WC-3 (Standard WC + 3 Inlets): The ultimate en-suite solution, offering multiple side inlets for basin, shower, or bidet with integrated non-return valves.
Sololift2 CWC-3 (Wall-Hung / Concealed WC): An ultra-slim profile engineered specifically to sit discreetly inside frame systems or wall cavities.
Sololift2 C-3 (Kitchen Waste & Washing Machines): A high-temperature greywater specialist that safely handles continuous pumping up to 75°C (and up to 90°C for 30 minutes).
Sololift2 D-2 (Low-Profile Shower Trays & Sinks): Designed specifically for tight floor clearances, featuring a remarkably low inlet height of just 50mm from the floor line.

Pro-Tips: Avoiding the Dreaded Callback

The Grundfos engineers have done an amazing job in designing reliability in these boxes, but without suitable pipework, even the best macerator will fail. Here are three trade tips for every install to help protect your professional reputation and keep your weekends free:

1. Ditch the Push-Fit

Macerators and greywater pumps eject wastewater under pressure. Though push-fit joints are acceptable for standard gravity systems, the pressure cycles in the macerator system can weaken seals and cause joints to break. Always use a high-quality solvent weld or copper pipe when fitting the discharge pipe from the macerator unit.

2. Go Vertical Before Horizontal

When planning your pipe run, always design the system to pump vertically first to gain the required height, and then switch to the horizontal run. The horizontal section must maintain a gradual, continuous downward fall (a minimum of 1:100, or 10mm per meter) all the way to the main soil stack, as outlined in the UK Building Regulations Approved Document H.

3. Sweep, Don’t Bend

Tight, rigid elbows are a major contributor to friction loss. They require the pump to do way more work, thus limiting its lifespan and increasing the potential for clogs. Instead, use sweeping 90° bends, or use two 45° elbows to promote smoother waste flow.

The "Like-for-Like" Swap: If you're called out to replace an old, failing macerator from another brand, the Sololift2 is your best friend. It features adjustable, flexible inlet and discharge connectors that accommodate both vertical and horizontal pipe positions. In most cases, you can swap it in without re-running the existing pipework, helping you save time on site.

What’s In It For the Trade?

Grundfos didn’t just focus on the homeowner experience; they designed the Sololift2 range with the installer in mind, so the job stays simpler from start to finish.

The 3-Minute Service Window: If a unit ever requires inspection or maintenance, you won't need to disconnect the tank from the pipework or dip your hands into messy wastewater. The entire motor, pump, and control assembly lifts out cleanly as a single, dry unit.
External De-Clogging: If a foreign object does manage to bypass the cutter and jam the system, you don’t have to unscrew the main lid. The unit features an external anti-clogging shaft that lets you free up the mechanism with a screwdriver from the outside.
Peace of Mind: Backed by pressure-tight tanks, powerful motors, and a robust 2-year manufacturer guarantee, these units provide the ultimate reliability for peace of mind on every job.

Get the Job Done with City Plumbing

Tricky drainage jobs don’t have to mean turning down work or risking your reputation on poor equipment. With the Grundfos Sololift2 range, you get a reliable, installer-friendly solution that keeps your customers happy and your weekends free.

Don't waste time driving around checking merchant shelves. Head to your local City Plumbing branch today to access expert help. Or log into your online Trade Account to check live local stock at your closest branch, view your personalised trade pricing, and order via our super-fast Click & Collect service to keep your projects moving.