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Waterway Pump Union 2" S x S, 400-5570

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Waterway Pump Union Kit

Waterway Pump Union includes 2" union nut, 2" o-ring, and tailpiece with 2" slip fitting. 2" Slip is designed to slip over pipes with 2" inner diameter and outer diameter of 2-3/8". 2" buttress thread is only compatible with 2"* pump intakes, discharges, or plumbing listed as buttress thread. Also it fits Aqua-Flo and Balboa brand pumps with 2" threads.


  • 2" Buttress thread x 2" Slip
  • Will not thread onto 2" MPT fittings
  • Material: PVC
  • Glue slip into place with PVC Cement
  • Actual dimensions of union threads in 3" ID
  • Will not fit any plumbing connections in inflatable spas, Intex pools, Bestway pools or any Chinese made pool or spa with metric plumbing sizing.

* Dimensions:

Pump Union Size

Measure the Inside Diameter "ID" of your current "CLOSED" split nut or regular nut.


If it measures:

  • 2-7/16" then you need a 1-1/2"
  • 3-1/16" then you need a 2"
  • 3-11/16" then you need a 2-1/2"