Free Shipping on Orders Over $200*
  • Webstone Isolator EXP Tankless Water Heater Flange Set With PRV Valve - 54443WPR

    - Lead Free - 3/4 inch Sweat - Comes with Pressure Relief Valve

    Product ID • 54043PR00000

  • $80.75
  • Quantity:
  • Free Shipping Eligible


Easy two step installation of your tankless water heater with unsurpassed safety, features and benefits. This is a complete inlet/outlet valve system that provides everything you need for a secure installation including full port testing and flushing of the system with easy to install union connections.

Extra features like a full port for full flow throughout the valve including a full port outlet for purging, flushing and testing the system. The ability to drain your hot water lines throughout the building or just at the water heater with a quick quarter turn. It also features an outlet for your pressure relief valve, and a unique one-piece design that is so innovative it has a Patent Pending.

Protection for the life of your system. Emergencies are handled with quick quarter turn ball valve shut-offs for total isolation of your system in seconds. Repair or replace your heater in minutes with easy-fit union style connections that do not disturb your piping system. You are also protected by the best warranty in the business, the Web Warranty guaranteeing you a lifetime of trouble free service.

Return Policy | Shipping Policy

Manuals & Docs

Technical Specs

Webstone Isolator EXP Union Connections

  • Isolator EXP
  • Perfect for the Bosch Aquastar water heaters and most other water heaters with 3/4 inch connections
  • Easy two step color coded union connections
  • Full port throughout entire valve body
  • 3/4 Inch Outlet for pressure relief valve
  • 600 WOG 150 WSP
  • Conforms to NSF 61-9 the only way to install most tankless water heaters

Info & Links