This listing is for one 1 1/2" Slip X 2" Threaded Heater Union. This essential spa plumbing component connects 1 1/2" PVC piping (measuring approximately 1 7/8" outer diameter) to a 2" heater flange split nut. One end glues directly to 1 1/2" pipe or slip fitting, while the threaded end screws onto a 2" heater flange with approximately 3" inner diameter on the split nut and 3" outer diameter on the union body.

This hybrid union is specifically designed for installations where your spa's plumbing is 1 1/2" but your heater requires a 2" connection. Please note this is our least commonly ordered configuration - the 2" X 2" version is most popular, followed by the 1 1/2" X 1 1/2" version. Be certain of your sizing requirements before ordering. SpaShopper also carries the 1 1/2" Slip X 1 1/2" Heater Union and 2" Slip X 2" Heater Union for different plumbing scenarios.

Perfect for hot tub heater installations and repairs. For detailed installation guidance, search YouTube for: Hot Tub Spa Parts Heater Union 2" X 1 1/2" Slip Information The Hot Tub Professor