Hayward HAXNNO1930 Assembly, Nipples, Nuts, O-rings for Edi Series Replacement for Hayward H-Series Pool Heater Assembly, nipples, nuts, o-rings for edi series replacement Fits hayward h-series pool heater Weighs 1.9 pounds To be used with 1-1/2" OR 2" Plumbing on Hayward H-Series Heaters