This part is an Air Bleeder barbed plug and Silicon sealer usually used on Hot Tub Pump Faces to bleed the air off the pump while filling the tub up. 

I have seen these fittings in many brands of Hot Tubs just compare the pictures and measurements with your current fitting. 
This barb is usually replaced because the barb is broken off and leaking. 

Note: This Part is used on Spa Pump Wet Ends and will fit most Waterway, Aqua-Flo, Piranha, Newer Sta-Rite and others… 


413-1201 , 611202 , 672-4350 , 806105119 , 919 , RF850 55-270-2077, 35-555-1060

,55-270-2076,rf850, rf 850,,pump barb, bleeder barb, pump bleeder, 3/8", Barb Adapter, Valterra, 3/8" Barb , 1/4" Male Pipe Thread,1/4" mpt, mpt,1/4",

413-1201 , 611202 , 672-4350 , 676446 , 806105119919 , WW6724350B , WWP-851-2120,851-2120,8512120,672-4350,6724350,