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  1. #1
    Join Date
    Apr 2012
    Posts
    16
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    HP80 and MP39 replacements

    We've used MP39 since the R-12 phaseout, same with HP80. Both work very well, with any oil in short coupled applications. 134A has been nothing but a nuisance with it's low capacity, and my habit has been to remove the 134A and replace it with MP39 when I do repairs on small equipment.

    Both however are getting very expensive here in Canada. HP80 is more than double 404A and MP39 is almost three times 134a.

    What are you folks using as a drop in replacement? I don't mind using 404A, it seems to work well, but I don't want to use 134A. And I'd need something that isn't oil dependent.

    Derek

  2. #2
    Join Date
    Oct 2012
    Location
    riverside calif
    Posts
    517
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    been using hot shot r414b but the price of that is going up alot mixture of 22 so that explains that. good luck with that. have never been to fond of 134a

  3. #3
    Join Date
    Feb 2006
    Location
    USA
    Posts
    4,381
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    Not a fan of 414b in all types of equipment specifically pressure controlled boxes. 134a sucks but it's around & 404a is so cheap and I love it. The POE causes all kinds of restrictions that keep us busy lol. I was able to get a jug of mp39 for a hundred bucks brand new in box and sealed. I've yet to open it but think it's wise to hold on to. These days with the type of work I've been doing I'm only seeing 134, 22(boss wants to use MO99), 404 & 410.

    Sent from my SGH-T999 using Tapatalk 2

  4. #4
    Join Date
    Jan 2010
    Posts
    18,073
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    Quote Originally Posted by hvac wiz 79 View Post
    I was able to get a jug of mp39 for a hundred bucks brand new in box and sealed. I've yet to open it but think it's wise to hold on to.

    Sent from my SGH-T999 using Tapatalk 2
    Very wise it's turning into liquid GOLD. E-bay has it @ $XXX

  5. #5
    Join Date
    Dec 2019
    Location
    kailua-kona
    Posts
    1
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    What would you guys suggest using to replace HP80?
    Please let me know if you could help.

  6. #6
    Join Date
    Aug 2002
    Location
    Southold, NY
    Posts
    25,725
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    Not bad. Only a 6 year old thread!

    How old is this equipment?

  7. #7
    Join Date
    Jan 2010
    Posts
    18,073
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    Quote Originally Posted by pecmsg View Post
    Not bad. Only a 6 year old thread!

    How old is this equipment?
    Yeah gas options would have already changed a few times since then

  8. #8
    Join Date
    May 2009
    Location
    Earth
    Posts
    6,436
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    I am still working on R12 equipment. That old stuff never dies. Was working on an old Raetone with an AE4440A pump yesterday, the date on the compressor is 1976. I would like to see a new AE last that long.

  9. #9
    Join Date
    Jan 2010
    Posts
    18,073
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    Quote Originally Posted by EugeneTheJeep View Post
    I would like to see a new AE last that long.
    Put R12 in it and see what happens

  10. #10
    Join Date
    Aug 2002
    Location
    Southold, NY
    Posts
    25,725
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    I still have a drum of R-12 just for Freezers!

  11. #11
    Join Date
    May 2009
    Location
    Earth
    Posts
    6,436
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    Been using R409 since the 90s. I would have never guessed I would still be stocking it in 2020?

  12. #12
    Join Date
    May 2009
    Location
    Earth
    Posts
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    Quote Originally Posted by VTP99 View Post
    Put R12 in it and see what happens
    It would probably last longer?

  13. #13
    Join Date
    May 2009
    Location
    Earth
    Posts
    6,436
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    I jinxed the compressor, Monday I went there, and the cold control was off, checked the gas and the amps all okay. Someone must have turned it off because it was not working?

    Today, the compressor is drawing LRA. Time for a new crappy AE.

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