Two Hot Tub Spa Pump Union Coupling Fittings 3" Threads 2" Pvc Pipe Size

Hot Tub Spa Pump Union Coupling Fittings 3" Threaded for 2" pvc pipe size, PAIR of unions, exactly as shown and described. Inside diameter of the threads is 3.005" (minor thread diameter). The slip socket is pvc material, glues to your 2" fittings or piping, female socket size is an industry standard 2-3/8" inside diameter, same as 2" pipe is, use these to do any relocation of a pump, new construction, repair your spa, etc. Fits normal spa pumps with 3.065" outside diameter threads (major thread diameter), Waterway, Ultra Jet, Aqua-Flo, etc. Which have normal, spa industry standard buttress threads measuring approximately 3.065" in outside diameter.

This special spa industry buttress thread has 8 threads per inch, and is NOT commonly used on pool pumps, but on hot tub pumps only. The inside diameter of the female threads is 3.005", and the outside diameter of the nut is 3.4" THESE WILL NOT FIT POOL HEATERS, WILL NOT FIT POOL PUMPS, not for Hayward pumps, not for special Jacuzzi swivel union threads, not for some chinese pumps, NOR OTHER DEVICES. They fit American made hot tub pumps only, and only those that have 3.065" outside diameter threads. From Spa Pumps And More