Aquascape SLD 20000-40000 Adjustable Flow Pond Pump

Aquascape SLD 20000-40000 Adjustable Flow Pond Pump

The Aquascape SLD 20000-40000 Adjustable Flow Pond Pump is an adjustable-flow pond and waterfall pump with a UK maximum-flow specification of 37,800 litres/hour. Check the performance at your installation’s lifting height before ordering; the maximum flow is not the flow it will produce at every height.

What this model supplies

Maximum flow and maximum head are not simultaneous operating values. Allow for the lifting height, pipe friction and fittings when choosing the pump. The model name is a range identifier, not a promise of the flow at your waterfall.

The UK SLD package includes its Smart Pump Receiver for adjustable-flow control. The handheld remote is optional. Keep the receiver positioned according to its installation instructions.

Before you order

Choose a water pump from the flow it can deliver at your actual lifting height and pipe resistance. Maximum flow and maximum head are opposite ends of the performance curve, not values it achieves together.

• Measure vertical lift and the pipe route, including bends and fittings.
• Compare the UK model and its performance curve, not a similar US model name.
• Check pump access, connector sizes and whether speed control is included.

EcoWave, SLD or Ultra?

EcoWave is a fixed-flow range used in pond and waterfall systems. SLD offers adjustable flow with the specified controller. Ultra is a compact water-feature pump range. Select by the real duty point and installation rather than choosing solely by watts.

Will a larger pump always improve the feature?

Not necessarily. Excess flow can overwhelm a spillway, waste energy or increase splash. Match the pump to the filter, pipework and desired effect.

Continue planning: Aquascape Pond & Waterfall Pumps · Aquascape Pipe & Tubing · Aquascape Pump Spares & Accessories

Useful links for this model

• Replacement impeller listed for this UK model

Adjustable flow for a designed pond circuit

The SLD is a submersible, asynchronous-motor pump for pond and waterfall applications. Its adjustable flow lets you tune the water effect to the installation instead of relying entirely on a restrictive valve. The model name and the UK performance figures are different pieces of information; use the specification table and performance curve for sizing.

The included Smart Pump Receiver provides local controls and compatible app operation. Position it according to the instructions, protected from flooding and excessive heat; avoid direct sunlight where practicable. The optional handheld remote is a separate accessory, not an essential part of the supplied control system.

Pipework and maintenance that protect performance

The UK catalogue recommends a practical 2-inch or 3-inch pipe route for this range. Long narrow runs and unnecessary elbows increase resistance, so assess the whole route rather than choosing a pump from the outlet diameter alone. Check the filter or spillway also accepts the resulting flow.

Leave an accessible isolation and disconnection arrangement for servicing. Keep the pump submerged as instructed and prevent the intake being starved by a dirty skimmer or low reservoir level. Solids handling reduces some maintenance demands; it does not make the intake immune to leaves, stringy debris or scale.

Isolate the electrical supply before inspection and follow the impeller-cleaning procedure. If output drops, check water level, intake, pipe restrictions and controller setting before assuming a larger pump is needed. Match replacement parts to the exact UK model shown above.