Grundfos UNILIFT AP12 pumps suit rainwater, groundwater and suitable non-aggressive grey-water drainage. The models have maximum flow ratings from 233.4 to 533.4L/min and maximum head ratings from 10 to 18m, depending on the motor version. Maximum flow and maximum head are separate limits. Actual flow depends on lift and pipe resistance; the matching 50Hz performance curve helps assess expected flow for the installation. Performance is 120L/min at approximately 7.9-14.8m head, depending on model.
AP12.40 models have a 40mm (1 1/2") Rp / BSP female thread outlet; AP12.50 models have a 50mm (2") Rp / BSP female thread outlet. Maximum particle diameter is 12mm. The pumps suit water containing small amounts of suspended solids, but not sewage, long fibres, stones or aggressive and flammable liquids.
Single-phase A models have a tethered float switch that starts and stops the pump as the water level changes. Three-phase A models are supplied with a separate float switch and a control box containing the motor starter and overload protection for automatic start/stop. No-float versions have no automatic low-water stop and need supervised operation or suitable external level control.
For a permanent float-switch installation, allow a minimum pit diameter of 550mm and depth of 600mm at the minimum free float-cable setting. The float must move freely. Maximum installation depth is 7m with the 10m cable. Keep at least 3m of cable above liquid level. Install on a firm base clear of sludge and mud. Keep the inlet strainer covered during pumping and do not run dry.
Single-phase models use 220-240V, 50Hz and have an Australian plug and internal thermal overload protection, which resets after cooling. Three-phase models use 400V, 50Hz and have no plug. Three-phase A models include motor starter and overload protection in the supplied control box. Three-phase no-float models require a separately provided motor starter and motor protection matched to the nameplate current.
Suitable liquid temperature is 0-55°C and pH is 4-10. The pump can operate upright or horizontally with its outlet at the highest point. For permanent installations, Grundfos recommends a union, non-return valve and isolating valve in the outlet pipe. Lift the pump by its handle.
The stainless-steel housing and semi-open stainless-steel impeller provide a compact drainage pump for portable or permanent use. A cooling jacket directs pumped liquid around the motor, supporting partly submerged operation while the inlet strainer remains covered. The removable inlet strainer gives access for cleaning.
Two-year manufacturer warranty, subject to Grundfos warranty terms and applicable consumer rights.
Grundfos UNILIFT AP12 Official Range Catalogue
AP Installation & Operating Instructions
AP Three-Phase Control Box Instructions
