The Isolator Uni-Flange Ball Valve from Webstone

The Only Way to Isolate Circulator Pumps

Webstone Isolator with Logo

Product Specs:

  • Inclusions/Features Adjustable Packing Gland, Bolt, Brass End Cap/Flange, Detachable Rotating Flange, Multi-Function Drain, Stainless Steel Nut
  • Application Residential, Commercial, Industrial, Glycol Mixture, Water
  • Packaging Quantity 1 per Carton, 20 per CaseHeavy Duty Forged Brass Construction
  • Unique Uni-Body Design on ALL designs
  • Available with 3-Way Main Ball Valve
  • Hi-Flow Hose Drain
  • Available with Rotating Forged Brass Outer Flange
  • Blowout Proof Stem
  • Adjustable Packing Gland
  • Conical Inlet to Minimize Turbulence
  • Slotted Holes for High Velocity Pumps
  • Available in IPS, SWT, Press,
  • PP‑R & PP‑RCT
  • Sizes 3/4" – 2"


  • Applicable Standard ISO 9001
  • Actuation Type Lever Handle
  • Nominal Size 3/4"
  • End Connection Press x Flanged
  • End to End Distance 3-11/16"
  • Ball Material Chrome Plated Brass
  • Body Material Forged Brass
  • Stem Material Brass
  • Seat Material PTFE
  • Seal Material PTFE Stem Seal, Brass Packing Gland
  • Handle Material Plated Steel
  • Port Type Full
  • Temperature Rating 250 Deg F
  • Pressure Rating 250 PSI CWP


  • Available with Removable Outer Flange
  • Flush Inner & Outer Flanges Help to Prevent Damage from Over-Torquing
  • Stainless Steel Snap-Ring Secures the Outer Flange & Provides Greater Control During Installation
  • Saves Labor, Saves Space & Reduces Leak Paths
  • Prevents Electrolysis
  • Eliminates Galvanic Corrosion
  • Allows Virtually No Air Into System Upon Pump Replacement
  • Fits Virtually Any Circulator Pump
  • Guaranteed for Life


Webstone The Isolator
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WEBH81416HV H-81416HV Webstone 1-1/2" Press Rotated Isolator Flange With Multi-Function Drain
WEBH81417HVRF475 H-81417HV-RF475 Webstone 2" Press Round Rotated Isolator Flange With Multi-Function Drain