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    Thread: Air pump tune up

    1. #1
      OCkoiFan's Avatar
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      Air pump tune up

      I had a pond master Ap-20 for almost 5 years and I can see it is like giving only half of the air compare to fresh
      Should I give it a new diaphragm or better off with a new air pump ?
      Kit is around $15 new pump is around $100
      Anything could be bad with the old unit?
      Thanks
      M.Nguyen


    2. #2
      coolwon is online now Senior Member
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      Quote Originally Posted by OCkoiFan View Post
      I had a pond master Ap-20 for almost 5 years and I can see it is like giving only half of the air compare to fresh
      Should I give it a new diaphragm or better off with a new air pump ?
      Kit is around $15 new pump is around $100
      Anything could be bad with the old unit?
      Thanks
      Might be the supply pipe?

      The new world trend is to repair where possible.

      Enjoy the personal satisfaction of a home repair.

      Help's to understand how a goody operates.

      A hairline crack in the rubber diaphram could create less air.

      Garfield
      Find more about Weather in Durban, ZA

    3. #3
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      I've replaced many diaphragms on my three AP100s. There is little else that can go wrong with them and they are easy and cheap to replace.

    4. #4
      BWG is offline Senior Member
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      Easy to replace diaphrams. Always check for excessive backpressure as it will kill diaphram life. I did have one AP20 Pondmaster that developed a crack in the base that leaked air. Crack was fixed with epoxy. I believe the crack developed from excessive backpressure from not cleaning air stones.

    5. #5
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      I hope not...
      -Rain

      :I CAN'T BRING THIS SHIP INTO TRTUGA ALL BY ME ONESIES, SAVVY?:

    6. #6
      OCkoiFan's Avatar
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      It was only use to feed a koi toilet so there is not much I can do at the other end
      The supply line is 3/4” pvc so I’m not worry
      Time to order a new kit for tune up
      Thanks everybody
      M.Nguyen


    7. #7
      pondfishguy is online now Member
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      I've replaced more than 10 diaphragms on the 20, 40 , 60 and 100 size pumps. They usually last 12-18 months of 24/7 operation. When the diaphragm fails the linear slider will start to tilt toward the electromagnet and eventually make contact over time and start wearing. What concerns me is the "5 years" of service you indicated. If BOTH diaphragms have failed I would remove the slider and check for wear/contact before replacing.If worn, I would junk it and buy a new one. You can get a new one under private label for under $70.

    8. #8
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      I have many of this pump Mfg. Out of sunlight and weather with reasonable backpressure easily 3 years and more on diaphram life (operating 24/7).

      If you are only getting 12 to 18 months diaphram life buy a high quality low pressure air gauge and check your backpressure. Out in the sun (excessive heat) and weather are also detrimental.
      Last edited by BWG; 01-11-2019 at 11:05 AM.

    9. #9
      OCkoiFan's Avatar
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      Quote Originally Posted by pondfishguy View Post
      I've replaced more than 10 diaphragms on the 20, 40 , 60 and 100 size pumps. They usually last 12-18 months of 24/7 operation. When the diaphragm fails the linear slider will start to tilt toward the electromagnet and eventually make contact over time and start wearing. What concerns me is the "5 years" of service you indicated. If BOTH diaphragms have failed I would remove the slider and check for wear/contact before replacing.If worn, I would junk it and buy a new one. You can get a new one under private label for under $70.
      Last time there was a deal on drs smith brand equivalent to an AP-40 for under $50 but I pass
      I like the name pondmaster better
      M.Nguyen


    10. #10
      BWG is offline Senior Member
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      For brand X air pumps sometimes you can find cross reference to parts that will work but usually a hassle finding and they often don't fit after getting them. You did well getting 5 years on the diaphrams. A change in pump noise and air output change are indications of diaphram wear. Act on it soon after detection and no additional issues. After the cover is removed you will easily be able to tell if something additional is wrong. Usually if the pump has been making excessive noise is when other damage is occurring.

    11. #11
      OCkoiFan's Avatar
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      I though so BWG thanks
      My brother AP-40 still going strong for 3 years
      So 12-18months is little short
      I do have my pump under the gazebo but his is just sit near the pond wall
      M.Nguyen


    12. #12
      catfish whiskers's Avatar
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      How about the Matala pumps from Your fave local wherehouse ? I’ve had great luck with them.

    13. #13
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      I've ran my alita 40 for 5 years straight and was used . My matala needs s rebuild. Imo most are all the same and back pressure kills the diaphragm. I've ran 5/8 air hose and keep air stones clean.

    14. #14
      BWG is offline Senior Member
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      I've got a couple of the Hakko HL40s (old style). Excellent pumps that handle backpressure well and very long diaphram life. Are the new style Matala/Hakko air pumps as good?

    15. #15
      catfish whiskers's Avatar
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      I thought I read somewhere that the Hakko and Matala are the same pump

    16. #16
      BWG is offline Senior Member
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      For some models they still offer the old style Hakko pump along with a same sized newer design pump with the Matala name on it. The old ones are heavy and built like a tank and with an excellent reputation. Not sure of the cheaper to manufacture new style. Definitely not the same pump.
      Attached Images Attached Images   

    17. #17
      OCkoiFan's Avatar
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      Quote Originally Posted by catfish whiskers View Post
      How about the Matala pumps from Your fave local wherehouse ? I’ve had great luck with them.
      Yes I will get a bigger one for a special pond someday
      M.Nguyen


    18. #18
      OCkoiFan's Avatar
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      Done

      I gave the pump all new necessary parts
      Still not very happy with the amount of air
      Just a bit better
      Old motor may not run as powerful as brand new
      Attached Images Attached Images  
      M.Nguyen


    19. #19
      ricshaw is offline Supporting Member
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      Quote Originally Posted by OCkoiFan View Post
      I gave the pump all new necessary parts
      Still not very happy with the amount of air
      Just a bit better
      Old motor may not run as powerful as brand new
      Maybe the problem is at the other end.


      member

    20. #20
      OCkoiFan's Avatar
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      Nope
      Running my air compressor through the pipe and mucho waves
      M.Nguyen


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