Dompelpomp water, 30W 800L/H 39ft DC 12V High Lift Quiet Electric Water Booster Pump, Brushless Motor, Circulatiepomp voor Fish Tank, Aquarium, Statuary, hydrocultuur

Works great

Funciona bien, es bastante silenciosa, pero no da el caudal anunciado, aún así es correcto

There appears to be no obvious way of mounting the pump + motor onto the supplied plastic mounting plate, certainly not unless considerable force is used. I doubt whether 'tapping' it home with a hammer would be the manufacturer's recommended procedure.So the shipment was REJECTED for this specific reason, and a replacement was ordered, but this too was received unmounted!!! I observed that both pumps arrived loose in their cartons, so it is just possible that they were mounted originally, but during transportation, each just separated in their unpadded cartons?The associated 12V connector was supplied with NO CONNECTION polarity declared, either on the connector or on the motor itself. It would be customary therefore to presume the convention that the centre pin was +12V, and that the shield was the negative connection.This was the polarity of the 12V 3A (=36 Watt) supply I tried initially, but that motor would not run without immediately stopping, and thereafter it subsequently continued to pulse intermittently. The motor's 30 watt rating should require a maximum of only 2.5A @ 12V, so I presumed that the motor's "switch on surge current" was beyond the 30W PSU's capability, and so I then graduated to a 12V 10A supply!Unfortunately this did not do the trick either, and the motor again continued to 'pulse'. The motor is described by the manufacturer as 'brushless', ie it uses electronic commutation from an on-board controller, which ought to carefully reduce the start-up current to sensible levels for the 30W PSU.Both pump items were supplied to me in plain brown cardboard boxes that were unpadded and unsealed. I never even tried the first pump offered, so that might well have functioned as expected? However I believe that the second pump could well have been a re-issued 'REJECT' from another Customer who had returned it, perhaps following an incorrect connection to the UNLABELED 12V input connector? I comment that the pulses of current drawn from the +12V PSU are unexpectedly very low, indeed at only a small fraction of an Amp, and the needle on the PSU ammeter hardly moves.Potentially a good concept, but spoilt by the questionable PSU polarity, and the fact that neither pump was supplied mounted on it's plate. Easy enough, I suspect to prize the mounted pump off the plate with a screwdriver; but impossible to remount without whacking it with a hammer, as the motor's own body profile prevents access to the plastic key-way!*****PS*****I've just discovered that the motor DOES function, but ONLY after I dismantled the pump housing by removing several self-tapping screws to check for foreign particles that might have been ingested by the rotor. There WAS one small piece of dirt that I removed, and that has freed the rotor.It also appears that the plastic mounting plate could now be (re-)fitted to the motor/pump, as it's housing restricted access to the keyway ~ but HOW MUCH BETTER IT WOULD HAVE BEEN IT IT HAD BEEN FITTED IN POSITION WHEN THE DELIVERY WAS MADE!