Lift height and run length trade against each other
The best macerators and lifting pumps for 2026
A macerator lets you put a toilet where the drain does not go, and it is the one appliance in this catalogue that will flood a room when it is used outside its stated limits. The two headline figures trade against each other: makers publish a maximum vertical lift and a maximum horizontal run, and you cannot have both at once — the usual rule of thumb published by the manufacturers is that every metre of rise costs several metres of run. Read their table, not the headline. The second decision is how many inlets: a unit behind a toilet may also need to take a basin, a shower, or a washing machine, and each addition has its own maximum inlet temperature, typically far lower than a dishwasher discharges. Nothing here replaces the installation instructions, and the wiring is subject to your country's rules for damp rooms. We compare stated vertical lift, stated horizontal run, number and size of inlets, maximum inlet temperature, discharge diameter, and stated noise level.