Resideo TK30PV100PNKP/U Combo Trim Kit W/Press Supervent 1" Boiler Feed Combination Valve, 4.4 Gallon

The Honeywell Boiler Trim Kit is all you need for your hydronic needs. Save time by ordering one item instead of several different parts. It's a complete time saving solution in one handy box! Kit Includes: Expansion Tank - Welded, not clamped, for longer leak-proof life, 4.4 gal tank. Butyl diaphragm to separate the air from the system water. Check Valves - Allows replacement of expansion tank and/or air vent without draining the heating system. SuperVent Air Eliminator - Optimal air removal from hydronic systems. Eliminates annoying gurgling sounds. Debris baffle to control dirt fouling and prevent failure. Dial-Set Boiler Fill Valve And Backflow Preventer - Easy dial-set technology allows simple output pressure setting in psi. 1/4" NPT port on side for optional gauge. Includes union nut, sweat, and threaded tailpiece.