Rainwater tank pumps

To get best use out of your rainwater tank, you need a good pump.
 
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  • Updated:19 Oct 2007
 

02.Results

 The following models scored the best results in our test.

What to buy
Brand Price
Gardena 4000/5 Jet $383
Grundfos MQ3-45 $908
Onga Dominator 4" 75/35 P3200100 (submersible) $654
Bianco Pumpz BIA-INOX 80PC $463
Dab Pumps DAB-JINOX62MPCX $701
Davey HP45-05T $720
Grundfos JP Basic 2 PC $519

About the rest

The other pumps had lower flowrates, but were mostly still OK at 10–14L/min. You’d probably be reasonably happy with most of them. The one exception is the Rivaflo, which only achieved a very slow 6L/min.

We also tested the Aldi Garden Pump Gardenline AGFWP-800, which is now no longer available. Its flowrate was 14L/min, and it scored 75%. Priced at only $99, it was good value if you bought one.

 

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Results table

Full results for all models are shown in the table below.

  Performance Features Specifications
Brand / model (in rank order) Flowrate score (%) Measured flowrate (L per minute) Buckets filled in 1 minute Noise Carry handle Outlets Pump starts and stops automatically Run-dry protection Measured power (W) Weight (kg) Price ($)
Gardena 4000/5 Jet
www.nylexwater.com.au
90 17 1.9 Noisier 2 1000 10 383
Grundfos MQ3-45
www.grundfos.com.au
90 17 1.9 Typical 1 880 13 908
Onga Dominator 4" 75/35 P3200100 (submersible)
www.pentairwater.com.au
85 16 1.8 Quiet 1 ns 540 9.3 654
Bianco Pumpz BIA-INOX 80 PC
www.whiteint.com.au
80 15 1.7 Typical 1 670 8.2 463
Dab Pumps DAB-JINOX62MPCX
www.whiteint.com.au
80 15 1.7 Typical 1 ns 670 8.6 701
Davey HP45-05T
www.davey.com.au
80 15 1.7 Typical 1 640 9.4 720
Grundfos JP Basic 2 PC
www.grundfos.com.au
80 15 1.7 Typical 1 710 11.8 519
Claytech Bluetron 100
www.claytonengineering.com.au
75 14 1.6 Typical 1 560 8.8 415
Davey SJ35-04PC
www.davey.com.au
75 14 1.6 Typical 1 530 7.9 418
Onga SMHP450
www.pentairwater.com.au
75 14 1.6 Typical 1 610 9.2 791
Onga Tankbuddy OTB450A (submersible)
www.pentairwater.com.au
75 14 1.6 Quiet 1 650 7 514
Dab Pumps DAB-KPS30-16MPCX
www.whiteint.com.au
70 13 1.4 High-pitched 1 ns 430 6.7 471
Gardena 3000/4 Jet (A)
www.nylexwater.com.au
70 13 1.4 Typical 2 560 6.1 269
Leader Ecotronic 90
www.claytonengineering.com.au
65 12 1.3 Typical 1 550 7.2 300
Onga SMH 350
www.pentairwater.com.au
65 12 1.3 Typical 1 410 6.6 446
Bianco Pumpz BIA-TECH40PC
www.whiteint.com.au
55 10 1.1 Typical 1 400 7.2 278
Rivaflo TFM30
www.pentairwater.com.au
35 6 0.7 High-pitched 1 370 6.7 458
 

ns - Not stated.
(A) - Discontinued.
Score The score is based on the measured flowrate.
Number of buckets filled in one minute How many standard 9L buckets the pump could fill in that time.

How we tested

The inlet side of each pump was connected to a 500L water tank, and the outlet side to a standard 30m, 12mm diameter garden hose with a spray head. The water flowrate and pressure achieved by a pump can vary depending on the size and elevation of the water tank, among other factors. The results in this test therefore only apply to our particular setup, but it’s likely many installations will mimic it, with tank and pump on the same level and one hose directly connected.

Our tester pumped water into a second tank mounted on a set of scales. The amount of water pumped was measured over three two-minute runs and averaged.

Each pump was rated for noise. Due to high background noise in our test area, the noise wasn’t recorded in decibels. Instead our tester gave each pump a comparative description.

He also measured how far the pumps could squirt water from the hose, but found there wasn’t a big difference between them. He checked the top and bottom-ranked pumps, plus one in between. The equal-top-ranking Grundfos MQ3-45 squirted water 10.9m, while the bottom-ranking Rivaflo managed 9m, and the middle-ranking Davey SJ35-04PC managed 10.7m.