***** Play It Koi is rated 4.9 out of 5 stars, based on 2735 reviews!

Hakko 40L Air Pump

11 reviews HK-40L


Sale price $143.00 Regular price $179.00

The Hakko HK-40L Linear air pump represents a top of the line Linear Air Compressor with 3 year warranty.

The Hakko Air Pump 40 will deliver a maximum of 70 Liters Per Minute. Only 40 watts used!!

Suitable for koi ponds up to 4,000 gallons.

This is a cast Aluminum body style. It is a small unit with surprisingly high output. Ideal for water depths between 2 feet to 10 feet deep. Shut off depth is 14 feet deep. The Hakko air pumps are built to last with a very durable body and mechanics meaning years and years of everlasting quality airflow.

Very low noise 32/38 dB at 1 meter, low power consumption, Silent operation, Completely oil free, Overload protection with Auto off/on switch for overheat situations. Low power consumption. UL and CE listed for outdoor use.

110 Volt is standard. 220 volt is by special order.

The outlet fitting is approx 5/8" O.D. 6 foot power cord supplied.

No oil needed for lubrication making the Hakko easy to maintain.

Model / Item HK-40 Application: Features & Benefits:
Rated Voltage (V) AC 115 (AC 110/115/120 or
AC 220/230/240)
  • Aeration
  • Liquid agitation
  • Mamut pump for air lift
  • Aerobic treatment
  • High Efficiency
  • Simple Maintenance
  • Completely Oil-Free
  • Overload Protection
  • Silent Operation
  • Long Life Expectancy
Power Supply Frequency (Hz) 56 / 60
Normal Pressure Bar (psi) 0.13 (1.85psi)
Rated Performance lpm (cfm) 51
Power (W) 40
Noise Level (dB) 35 Maximum dimensions: Certificate:
Closed Pressure / Bar 0.38
Closed Pressure / psi 5.5 204 x 174 x 215 mm
  • CUL
  • CE
  • JET
Weight (kg) 5.4 / 11.9

The graph below shows water depth in feet.

Looking for the Hakko 40LP? We have it! it has the same quality innards as the Hakko 40L! While a tiny bit louder than the original, with the plastic casing you don't have to worry about rust and the price point helps the pocket book... View the Hakko 40LP here!

Customer Reviews
5.0 Based on 11 Reviews
Write a Review Ask a Question
  • Reviews
  • Questions

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
United States
Yes! Thanks!

Fast shipping, prompt customer service. Excellent prices! Will be shopping here again

Madeleine S.
United States United States
Recent Purchase Wonderful Quality

The Hakko 49L air pump, Matala Weighted Line, and manifold that I purchased recently from PlayItKoi are clearly super high quality. I have a great deal of confidence in this company!

United States United States
Once again I’m impressed

Fast shipping Great product!!

Casey M.
United States United States
Great Service With A Great Price

I'm in Hawaii on the big island. Lowes and Home Depot are our pond stores. Play It Koi was the only company that would go to the trouble of shipping via USPS. A significant savings. Thanks

Jacob W.
United States United States
Great Aerator

Powerful, quiet and compact. Also great customer service! ❤️❤️