Overview Reviews Similar Products Product Description Heater Split Nut For 2" Heater Housings, Measures 3 1/16" On The Thread Side And 2 1/4" On The Housing Side. Location: SMR5B4 Product Videos Custom Field Product Reviews Find Similar Products by Category Recommended Quick view Sundance Spas Heater Assembly, Flo-Thru, 4 KW $189.95 Add to Cart Quick view Emerald Spas Heater Assembly, Flo-Thru,1.0KW 12" $135.95 Quick view Jacuzzi Spa Heater Assembly, Flo-Thru, 4.0 kW (Z135) $229.95 Add to Cart