Pump Unions and Related Parts
Pump Unions and Related Parts
This is a chart for the outside Diameter of your plumbing pipes or Threaded Fittings so you can figure out what size parts to order. Note: The actual size a part is called is not the actual size of the hole in the part it is really the Inside Diameter of the pipe that would glue into that part which doesn’t make sense, since you cannot see inside the pipe. Therefore I am giving you the measurements of the outside of the pipe so you know what size part to order. For example a part that ½” plumbing would glue in to, would actually measure ¾” inside the hole of the part and on the outside of the pipe that glues into the part.
Pipe Outside Diameter chart:
½” Outside Diameter is ¾”
¾” Outside Diameter is 1”
1” Outside Diameter is 1 ¼”
I have never seen 1 ¼” in Hot Tubs
1 ½” Outside Diameter is 1 ⅞”
2” Outside Diameter is 2 ⅜”
2 ½” Outside Diameter is 2 ⅞”
Threaded Parts Outside Diameter Chart:
1” Pump Thread Outside Diameter is 2”
1” Pump Union Thread Inside Diameter is 1 13/16”
1 1/2” Heater Union or Pump Thread Outside Diameter is 2 7/16”
1 1/2” Heater Nut or Pump Union Inside Diameter is 2 5/16”
2” Heater Union or Pump Thread Outside Diameter is 3 1/16”
2” Heater Nut or Pump Union Inside Diameter is 2 15/16”
2 1/2” Heater Union or Pump Thread Outside Diameter is 3 11/16”
2 1/2” Heater Nut or Pump Union Inside Diameter is 3 9/16”
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Pump Union, Hayward, 1-1/2" Threaded x 1-1/2" Slip Set fo (2) SP1500
MSRP: $33.37$25.99Half Union Fitting Complete Set... The Threaded side measures about 2 3/8" Inside and the Slip Glue end measures about 1 7/8" Inside Diameter... Note: Although this measures very much like a 1 1/2" x 1 1/2" Slip pump union it only fits Hayward Pumps...MSRP: $33.37$25.99 -
Pump Union Adapter, 2" female Thread x 2-1/2" Male Thread, w/o O-Ring
MSRP: $19.99$14.99This fitting is designed to change a 2" thread wet end connection that measures about 3" edge to edge to a 2 1/2" Inside threaded Pump union that measures about 3 5/8" ID... First Plumbing Connection Size 2"First Plumbing Connection...MSRP: $19.99$14.99 -
Union Adapter, 2" Threaded Outside x 1-1/2" Threaded Inside, w/O-Ring
MSRP: $17.63$13.99Standard Pump Union Adapter Assembly With this adapter you can convert a 2" Threaded Pump Union whcih measures about 3" I.D. to a 1 1/2" threaded fitting which = 1 7/8" O.D. standard wet end. An O-Ring does come with this fitting but if you just needed...MSRP: $17.63$13.99 -
2 1/2" Split Nut Kit for Pump Union Emergency Repair
MSRP: $24.99$19.99This part is a 2 1/2" Pump Union Split Nut Repair Kit which includes the split nut and (2) Screws for use with a 2 1/2" Pump Union. The Pump Union Split Nut that measures about 3 3/4" on the outside and mounts to the existing Pump Union Body using 2...MSRP: $24.99$19.99 -
Jacuzzi® J Pump Union 1 1/2" slip or 2" Street Fitting How To Video
MSRP: $22.99$15.99This part is a Jacuzzi® J Pump Style Pump Union that can be used on 1 1/2" or 2" Plumbing systems. This union can receive a 1 1/2" plumbing part inside the back of the union or a 2" Plumbing part glued to the outside of the...MSRP: $22.99$15.99