This listing is for one 1 1/2" split nut assembly for hot tub heaters, complete with (2) mounting screws. Designed for 1 1/2" heater unions measuring approximately 2 3/8" outer diameter. This heater flange split nut attaches directly to your heater tube using the included screws, then threads securely onto your heater union (gasket required between union and tube - available separately in our store). Compatible with systems where both plumbing and heater measure 1 1/2". This configuration ranks as the second most common size - 2 x 2 being most popular, followed by 1 1/2" x 2 in third place. Essential component for connecting heater tubes to heater unions in spa applications.

Important: Heater tube shown in product images is for reference only and NOT included with purchase. Split nut color may vary from images.