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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 (27)
  • Questions (1)

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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!

mark m.

great pump

amazing pump. a little loud but drawing water from the basement 60' away so not bad. fast shipping.

Philip W.
United States

Topoff Pump

I've used several topoff pumps in the past, but this one appears to be the best for my needs: high head, reasonable volume, anti-siphon and quiet. I've been using it for several weeks and, so far, I'm quite pleased. Note that the input/output barbs are a bit nonstandard and you might want to order some of the 'pushlock tubing adapters' if you intend to integrate this pump with standard 1/4" hard nylon tubing.

Tim G.

Great product!!

I bought this to replace another popular brand of lifting pump. The pump I was replacing was only capable of barely a trickle at 24" of suction head. The Avast Marine pump easily provides the flow I need at this height and then some. Great product and wish I bought it sooner.