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Master Spa Unions / Tailpieces / Split Nuts

When you order your Master Spa unions, tailpieces, and split nuts from Master Spa Parts, you can be confident you’ll receive an authentic OEM replacement part from Master Spa. These replacement parts feature high quality threads that will go on easily, without any leaks or pressure points.

Need help deciding which Master Spas unions, tailpieces, or split nuts you need? Call our Customer Service team today at (855) 308-2149.

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    Heater Split Nut

    Master Spas Heater Split Nut
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    The 2 inch Standard Pump Union is a standard pump union used for complete assembly of your replacement pump. Should fit any 2 inch end on most pumps.

    2 inch Standard Pump Union
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    2 x 2 inches Heater Tailpiece with Gasket

    2 x 2 inches Heater Tailpiece with Gasket
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    The 2 inch Pump Split Nut is used as a replacement for the pump union that would need to be re-plumbed. You can cut off the old pump union and replace with this split nut. This comes with the 2 screws that screw and hold it together.

    2 pump split nut
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    The 1.5 inch standard pump union is a universal pump union used for complete assembly of your replacement pump. Should fit any 1.5 inch end on most pumps.

    You need this to fully assemble your pump.

    White inset replacement rings
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    2 inch Sweep Pump Union

    2 inch Sweep Pump Union
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    The 1.5 x 2 inch Pump Adapter tailpiece is a pump assembly part commonly used to create a tight seal between pump parts along with the O-ring.

    Make sure to buy all the parts you need for complete assembly of your replacement pump.

    1.5 x 2 inch Pump Adapter Tail Piece
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    The 1.5 inch Pump Split Nut is a replacement part for your pump union that needs to be re-plumbed.

    Need to replacement your entire pump unit ? Don’t forget to buy all the parts you need to fully assemble the pump.

    1.5 inch Pump Split Nut
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    Adapter Laing 1.5 inch FBT

    laing adaptor
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