Overview Reviews Similar Products Product Description Split nut union, standard 1-1/2" Aqua Flo Union nut. Measures 2 3/8" On the threads and 2 1/8" on the opening, perfect way to replace your pump union without having to replump. Location: SMR2B17 Product Videos Custom Field Product Reviews Find Similar Products by Category Recommended Quick view Master Spas 1-1/2" Split Pump Union X804652 $11.95 Add to Cart Quick view Master Spas 2" Pump Union - X275210 $16.85 $13.95 Add to Cart Quick view Caldera Relia Flo XP 2" Union Complete $16.85 $13.95 Add to Cart