Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Taco Air-Scoop replacement

jmoar Member Posts: 20

We are looking to add an Caleffi (or similar) magnetic dirt separator to a cast iron boiler system. Is there any reason we cannot remove the Taco Air-Scoop and install the separator at that location? It would appear that we do not need both, but we're getting mixed messages now.

Thanks for the input!


    EBEBRATT-Ed Member Posts: 15,835
    Yes the Caleffi would take the place of the air scoop
  • HomerJSmith
    HomerJSmith Member Posts: 2,511
    I usually install a magnetic dirt separator at the return to the boiler and the air eliminator at the supply out of the boiler. Air scoops work ok but takes a little longer to work than a micro bubbler. You do need a air eliminator. Caleffi makes a combination dirt separator and air eliminator.
  • Dave H_2
    Dave H_2 Member Posts: 559
    @jmoar If you are not experiencing air issues in your system, why change? Air elimination on the supply helps with air removal and the water being the hottest there.

    There are dedicated magnetic dirt separators available to be installed on the return side to protect the boiler. However if you are experiencing water quality issues, it may be best to treat chemically before mechanically first.

    If you are looking to update your air removal components, maybe a hi efficient device is what you are looking for, something that has a collision media internally as well as enhanced venting will do the trick.
    If you are not familiar with either component, here are some examples
    Enhanced Air Sep
    Mag Dirt Sep

    Dave H.
    Dave H
  • jmoar
    jmoar Member Posts: 20
    thank you. We just had to have the glycol on the entire system flushed as there was some small metallic particles visible. It is a cast iron boiler as well so the next step seemed to be a magnetic separator. The air scoop is on the supply side, but would be the easy spot in the system to install it. If it needs to be on the return we will have to make that happen. Thank you!
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 8,166
    The air separator is best on the supply the magnet separator os best on the return before the boiler and before the circulator if that happens to be on the return. You want to purchase a combination air separator/magnet separator all in one... then put it on the supply in the place of the Taco air scoop. During your repipe, you can also put the circulator pump on the supply just after the air separator.
    And while you are at it, perhaps the expansion tank and fill piping can be located at the air separator with the circulator pumping away from the expansion tank. Here is an excerpt from a book I used when teaching one day seminars on Hydronics.

    Piping a “Heating Module” to Increase
    Your Business
    Once you get away from the traditional method of pumping back from
    the system you begin to open a whole new world of opportunity for
    yourself. Consider this. With the circulators on the supply side along
    with the air separator, expansion tank, pressure reducing or fill valve,
    flow-control valves, etc., you can now isolate the entire “Heating
    Module” between a couple of isolating valves.

    Look how easy this makes servicing any component. You just close a
    couple of valves. You get all the advantages of supply-side pumping
    and you can even prefabricate and test the entire module in your shop
    and then just connect it to a knocked down boiler. You already know
    how much space you have to work with because you saw the boiler
    room when you priced the job. Think about it. If they can prefabricate a
    house, why can’t we prefabricate a boiler job? Besides, isn’t it easier to
    work on a well-lit bench than in a boiler room?
    Using the Heating Module also gives you a good story to tell the home
    owner when you’re selling the job.

    This book was written before the Micro-bubble air separators. So you can eliminate the 18" approach pipe and use the more efficient combination dirt mag/air separator in this location for more efficient service in the future. Here is the text booklet if you want to read the whole thing. It’s very informative.

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

    jmoarHomerJSmithAlan (California Radiant) Forbes
  • Jamie Hall
    Jamie Hall Member Posts: 23,640
    Metal particles? Likke visible flakes of metal, or slivers? That's not from corrosion -- that has to be from something, mostly likely a pump, wearing. Might want to investigate...
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • hot_rod
    hot_rod Member Posts: 22,472
    Look for the Caleffi Gold Standard kit. It includes the Discal and DirtCal Plus mag sep at a great price with a gold Sticker!
    I see them at Supplyhouse,com
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream