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What kind of fittings

Hi all,

Went to change the pump Fri. and the new pump had a different size fitting, so back in went the old pump.

The fittings seal to the pump with o-rings and do not have tapered threads, though a 3/4 NPT fitting does screw into the threads, but won't seal.

The flange fittings also seal with a o-ring.

Looking for a name that I can call a distributor and ask for a fitting. sometimes describing doesn't quite cut it.

Thanks Don in Mo


  • Larry C_13
    Larry C_13 Member Posts: 94
    BSPP ?

    Could it be BSPP? British Standard Pipe Parallel thread.

    Both NPT and BSP 3/4" pipe has the same thread pitch of 14 TPI. The peaks and valleys of the BSP threads are rounded instead of flattened like NPT.

    Larry C
  • ddlong1286@yahoo.com
    [email protected] Member Posts: 139
    You Are Correct!!

    I was able to talk to the manufacturers USA rep today and he told me that they are indeed 3/4 BSP threads in the pump.

    Now if I can find out about the fittings on the old pump and where to get them!

    Don in MO
  • Glen
    Glen Member Posts: 855
    try -

    a hydraulics supply house. Sounds like a JIC fitting with o ring.
  • Larry C_13
    Larry C_13 Member Posts: 94
    BSP to NPT adapters

    Try the McMaster-Carr site for BSP Tapered to NPT adapters.


    If they are BSPP threads, then I do not know where to get adapters.

    Larry C
This discussion has been closed.