This part is a Hot Tub Replacement Bottom Drain Inside Wall Fitting with a 3/4" slip fitting which measures about 1" I.D.. This part is on the foam side of the tub and the Fitting screws into this fitting.. You have to stand the hot tub up and dig into the foam to replace this part in most cases..
21400196, 640-1620,drina,leak,leaks,bottom,cal,spa,hot tub,hot tub,spas,leaking,crack,fitting
