Hayward CHXPLG1930 3/4-Inch Drain Plug Replacement for Select Hayward H-Series Pool Heater Replacement drain plug Fits hayward h-series and h-series millivolt heater models h1501, h150p1, h2001, h200p1, h2501, h250p1, h100id1, h100idp1 Also fits hayward universal h-series low nox models h150fdn, h150fdp, h200fdn, h200fdp, h250fdn, h250fdp, h300fdn, h300fdp, h350fdn, h350fdp, h400fdn, h400fdp Also fits Hayward H-Series CZ, HM2 models 3/4-inch; weighs 5.5 pounds