Pond Pump
Evolution Aqua Varipump 20000
Model: VP20
A controllable/variable-flow pond pump with a manufacturer-stated maximum flow of 20,000 lph and a rated maximum power of 190 W. Supplied with a wired inline digital control box and stepped hosetail fittings for 50/40/32 mm hose.
About Evolution Aqua Varipump 20000
The Evolution Aqua Varipump 20000 (VP20) is a variable-flow pond pump supplied with a wired inline digital control box that lets the user switch the pump on/off and set output using increase/decrease buttons. The manufacturer documents a maximum flow of 20,000 litres per hour and a maximum electrical consumption of 190 W for this exact model. The pump is intended to be connected to 2" pressure pipe; a stepped hosetail is supplied and accepts 50 mm (2"), 40 mm and 32 mm flexible hose (the manual instructs trimming the smaller steps to suit the largest hose diameter). The control box is weather-rated to IPX4 and must not be submerged; Evolution Aqua documents a 2.0 m mains cable from mains to the control box and a 10.0 m cable from the control box to the pump, with a weatherproof 4-pin connector between pump and control box. Physical dimensions published by the manufacturer are 319 mm (L) x 142 mm (W) x 181 mm (H). The Varipump is not described as having any built-in UV function, and the pump body IP rating and weight are not stated in the manufacturer documents reviewed. The manual also describes that the pump is not self-priming and provides installation guidance (suction-line recommendations, non-return valve recommendation for non-flooded installations) and the permitted operating temperature range (>0 °C and <35 °C). Evolution Aqua provides a two-year guarantee against defects in material and workmanship for the product, subject to stated exclusions in the manual.
Best for
Installations needing a high-flow (up to 20,000 lph) controllable pond pump with wired inline digital flow control and 2" pressure-pipe connections.
Things to consider
Official Evolution Aqua documents for the Varipump 20000 contain a conflict on maximum head: some first-party documents list maximum head as 6.5 m while another official Evolution Aqua manual/attachment lists it as 5.5 m. Because both values are published by the manufacturer, the maxHeadM field is left null here. Manufacturer documents reviewed do not publish the pump body IP rating, pump weight, any pond-volume recommendations (general, fish or koi capacities), operating pressure (bar/psi), or any UV/UVC lamp specifications. Two distinct cable lengths are published (2.0 m mains→control box and 10.0 m control box→pump); because cableLengthM is a single numeric field this is represented in specifications and the cableLengthM field is null.
Installation
Control box is rated IPX4 and must not be submerged. The pump is not self-priming; for non-flooded intakes a non-return valve is recommended (per manual). Use 2" pressure pipe or the supplied stepped hosetail; trim hosetail steps to match hose. Observe the manufacturer-stated operating temperature limits (>0 °C and <35 °C). Connect mains to the control box (2.0 m cable) and the control box to the pump (10.0 m cable) using the supplied weatherproof 4-pin connector.
Maintenance
Follow the manufacturer manual for service and maintenance instructions. The Varipump package and manual reference strainers and a base plate and include general guidance on installation and upkeep; the manufacturer manual should be consulted for specific maintenance steps and warranty exclusions.
Safety
Control box IPX4 — do not submerge the control box. Observe operating temperature limits (>0 °C and <35 °C). The pump is not self-priming; incorrect installation may allow backflow—use a non-return valve where recommended. The control box and pump use a weatherproof 4-pin connector; ensure connections are fitted as instructed by the manufacturer.