Saniflo and macerator toilet repair across London

A macerator pump sits behind the WC or under the basin in any en-suite, basement bathroom, or loft conversion where gravity drainage to the soil stack is not possible. The pump grinds waste through a small-bore stainless cutter, then lifts it through a 22mm or 32mm discharge pipe to the nearest gravity stack. When it works it is invisible. When it fails it floods the room within minutes and lets foul water into the floor build-up, which is why a macerator fault is always an emergency. The Saniflo Sanibest, Sanispeed, Saniaccess, and Sanivite are the most common units in London property, and each has its own family of repairable failures.

We carry seal kits, membrane assemblies, cutter blades, and replacement microswitches for the Saniflo Sanibest, Sanispeed, Saniaccess 2 and 3, and Sanivite, along with the equivalent Stuart Turner Wasteflo and Whale Gulper service parts. Most field failures resolve to a blocked inlet, a perished pressure-switch membrane, a worn cutter, or a stuck microswitch on the float chamber, and a competent strip-and-rebuild on a serviceable unit takes 60 to 120 minutes. Where the motor itself has burnt out, or the casing is cracked, we recommend a replacement on a like-for-like or upsized basis depending on what the room is feeding into the unit and the discharge head it has to lift against.

How we deliver

No surprises, no upselling. The exact path every job follows.

1. 1
   Isolate power and water
   Macerator unplugged or isolated at its fused spur, water supply to the WC and basin closed at the service valves, and absorbent matting laid under the unit before any cover is removed.
2. 2
   Casing strip and inspection
   Top cover removed, motor lifted clear, cutter inspected for wear or jamming, and the inlet and discharge ports cleared of any solid debris. Most service jobs identify the fault inside the first 15 minutes of strip-down.
3. 3
   Component diagnosis
   Pressure-switch membrane checked for perish or stretch, microswitch tested for continuity, cutter blade checked for wear, and the motor tested for capacitor and start-winding integrity with a multimeter.
4. 4
   Repair on a serviceable unit
   Saniflo membrane kit, microswitch, cutter blade, or motor capacitor fitted as required. Bowl gasket replaced as standard during any major strip so the casing seal is fresh on reassembly.
5. 5
   Replace where the unit is uneconomic
   Where the motor is burnt out, the casing cracked, or the model long discontinued, we install a like-for-like or correctly upsized replacement (typically a Saniflo Sanibest or Sanispeed) onto the existing inlet and discharge pipework.
6. 6
   Discharge run inspection
   22mm or 32mm discharge pipework inspected for limescale build-up, kinks, sags, or non-compliant fall to the soil stack. Where the run is poor we recommend re-routing under separate quote before the new unit is commissioned.
7. 7
   Recommission and cycle test
   Water and power restored, unit primed, and put through three full flush-and-discharge cycles to confirm clean start, full evacuation, and clean stop. The room is left dry and odour-free.