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Webstone Isolation Valve Kit Z-Flex 40443
Webstone Isolation Valve Kit Z-Flex 40443

Webstone Isolation Valve Kit Z-Flex 40443

Brand: Z-Flex
SKU: 40443
Mfg Number:
Availability: In Stock Usually ships In 4-6 Business Days
Product Information
Retail: $94.26 Price: $84.16
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Z-Flex Venting Accessories - 40443 Webstone Isolation Valve Kit - For All Tankless Water Heaters

The Webstone "Isolator EXP" Isolation Valve Kit for All Bosch AquaStar Gas Tankless Water Heaters (40443) comes with separate hot and cold isolation valves.

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.


  • Convenient two-step color coded union connections
  • Easy quarter turn ball valve operation
  • Full port throughout entire valve body
  • Individually controlled full port drain outlet
  • Ready to use for flushing or descaling
  • 3/4" outlet for pressure relief valve
  • 1/2" water supply adapters included (except when purchased with the 3/4" Bosch 2700ES/2400ES heaters as they are not needed)
  • Heavy forged brass construction
  • Conforms to NSF 61-9
  • Allows for one man full diagnostic testing of heater unit

This product is intended for use with all of our indoor and outdoor tankless water heaters.


Heater-Store or any of it's affiliates are not responsible for damages or injury caused by wrongful installation or application of this product.

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