Webstone Expansion Tank Pro Service Valve™ 41672 Pro-Pal® 41672 Ball Valve, 1/2 in Nominal, FNPT x MNPT x FNPT x Hose End Style, Forged Brass Body, Full Port, PTFE Softgoods

WEB41672 MFG #: 41672
  • Ball Material: HCP Brass
  • End Style: FNPT x MNPT x FNPT x Hose
  • Inlet to Outlet Length: 3-3/8 in
  • Manufacturer Name: NIBCO Inc.
  • Media: Gas/Oil/Water
  • Nominal Size: 1/2 in
  • Port Type: Full
  • Pressure Rating: 600 psig WOG
  • Series: Pro-Pal® 41672
  • Softgoods Material: PTFE
  • Top to Inlet Center: 1-9/16 in
  • Trim Material: Brass Stem and PTFE Seat
Designed for residential, light commercial use with water or oil. This approved Webstone Valve allows for isolation and draining of an expansion tank in a closed loop hydronic heating system. It is actuated by a blow-out proof stem and features an adjustable packing gland. Threaded ends company with ANSI B1.20.1.
  • Features and More


  • Full port forged brass ball valve with hi-flow hose drain
  • The 3-way ball controls flow between the expansion tank and the system
  • Easily install, isolate, drain and replace any expansion tank
  • Quickly connect entire system to the cold water feed
  • Guaranteed for life
  • Ideal for use with Webstone air separator
  • Replaces 7 components
  • Eliminates 6 leak path
  • Saves 54 minutes of labor
  • PTFE stem seal


  • Residential and Commercial Applications


  • ANSI B1.20.1


  • Lifetime