Webstone The Isolator® H-51415HV Ball Valve, 1-1/4 in Nominal, C x Rotating Flanged End Style, Forged Brass Body, Full Port, PTFE Softgoods, Import

  • Actuator Type: Lever Handle
  • Ball Material: HCP Brass
  • Country of Origin: CN
  • Domestic/Import: Import
  • End Style: C x Rotating Flanged
  • Inlet to Outlet Length: 3-1/2 in
  • Manufacturer Name: NIBCO Inc.
  • Media: Water/Glycol Mixture
  • Nominal Size: 1-1/4 in
  • Port Type: Full
  • Series: 5141
  • Softgoods Material: PTFE
  • Top to Inlet Center: 3-1/6 in
  • Trim Material: Brass Stem and PTFE Seat
The Isolator is a uni-flange Ball Valve that isolates a circulator pump, allowing virtually no air into the system during pump replacement or service. Its innovative design combines multiple components into a single forged brass body that saves time, labor and space. The Isolator has revolutionized the installation of circulator pumps and has evolved into the largest flanged Ball Valve program in the industry today, featuring patented technology with further patents pending. Designed for use with water, oil, glycol mix in residential or commercial residential plumbing, commericial plumbing, heating systems. Refer to specification sheets for additional technical information. All Webstone products are backed by a limited lifetime warranty.
  • Features and More


  • Easily isolates the pump for replacement
  • Prevents electrolysis and eliminates galvanic corrosion
  • Rotating flange is secured by a snug-fit snap-ring that provides greater control over positioning during installation
  • Flange features a conical inlet to minimize turbulence
  • Multi-function drain makes the isolator the only valve that drains from either side of the pump
  • Fits virtually any standard circulator pump
  • Saves 63 minutes
  • Replaces 8 components
  • Eliminates 7 leak paths
  • This valve is actuated by a blowout-proof stem
  • Brass stem and PTFE seat


  • Residential
  • Commercial and Industrial


  • Adjustable Packing Gland
  • Nuts and Bolts


  • ASME B16.18
  • PROP65: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov


  • Limited Lifetime