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Diaphragm Pump

Diaphragm Pump

$ 49.99


This little diaphragm pump is an excellent choice for automatic top-off duty. Unlike other diaphragm pumps available, this little powerhouse can push water to 60psi (~130ft high). It can also safely run dry, unlike conventional powerheads. It is quiet and runs on 12v DC power. Flow rate is approximately 400mL/min, but note that it is not rated for continuous duty nor salt water applications. This means for intermittent use (as in ATO usage) it is great, but we do not recommend it for use as a calcium reactor feed pump, for example.  It can be used in conjunction with a kalk stirrer, but only to push fresh water into the stirrer.  We do not recommend pulling kalkwasser through the pump, as the high pH may shorten the life of the rubber diaphragms.

Diaphragm pump kit includes:

  • Pump in wall-mountable box
  • 12v DC Power Supply
  • Tubing, 10ft
  • Check valve to prevent back siphoning
  • Micro ball valve to adjust flow rate (max 400mL/min)
  • Siphon break tee (see instruction manual for details when this is needed)

Technical Specs:
Max flow rate:  400mL/min @ 0ft head pressure
Min flow rate: Fast drip
Max head pressure: 60psi or 130ft
Run dry: Yes
Self priming: Yes
Power: 12v DC, 4w max, 2w min
Warranty: 1 year

Click here for instruction manual

Customer Reviews

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  • Reviews (30)
  • Questions (2)

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Douglas M.
United States

Great pump

This pump is great for an ato setup. has more power than something like an aqualifter.

Henry Z.
United States

Diaphragm pump ***amazing customer service***

Purchased avast’s diaphragm pump for my Ato the previous pump died on. Received order quickly and correctly, unfortunately unit didn’t work. Reached out to to Avast who immediately sent me a return label no questions asked. Then much to my delight received pump back in order a week in perfect working order. Unit functions flawlessly and blown away by the awesome customer service. Avast has a customer for life with me

Doug B.
United States

Good ATO

I bought the ATO with diaphragm pump, and the system works well. I wish it was a little more sensitive for my application, but does it's job well. I use a large rubbermaid tub/tank for my sump and the amount of water that needs to evaporate to affect the vaccuum pressure is significant meaning the system doesn't top off as much as one would want to maintain stable parameters.

Harvey C.
United States

Excellent pump

I bought the diaphragm pump along with the auto top off system and I must say I wish I would have know about Avast before I bought my other ATO's. Avast has the best ATO on the market at a great price.

Randy S.
United States

Diaphram pump

Super powerful! Surpassed my expectations!