This 3/4" Drain Valve Assembly is designed for Hayward H-Series millivolt electronic ED1 style pool heater models H2001, H1501, H2501. Also compatible with Hayward H-Series Low NOx filter models H150FDN, H150FDP, H200FDN, H200FDP, H250FDN, H250FDP, H300FDN, H300FDP, H350FDN, H350FDP, H400FDN, H400FDP. 

Manufacturer Part Model: HAXRDV1930