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Double Check Backflow Preventer 350xl (3/4"-2")

Backflow preventer 350XL has a compact design and with its shorter lay length and lightweight body, it fits within tight spaces. This backflow preventer valve is ASSE* Listed, USC Approved, CSA* Certified, IAPMO* Listed, and AWWA Compliant.

This backflow regulator is preferred choice for both industrial and residential use as it has a high-grade brass body which is resistant to dezincification. The EZSwap™ removable pressure vessel provides safe and easy line flushing, quick winterization, and simple maintenance and repair. 

Product Resources

Spec Sheets & Install

BIM / 3D Models / 2D Drawings

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Popular Models

Popular Options

34-350XL

The 350XL Double Check Backflow Preventer provides low health hazard protection in potable water applications. The EZSwap™ removable pressure vessel provides safe and easy line flushing, quick winterization, and simple maintenance and repair.

To view all options, see the Specification Sheet - Model 350XL

34-350XLFT

The 350XL Double Check Backflow Preventer provides low health hazard protection in potable water applications. The EZSwap® removable pressure vessel provides safe and easy line flushing, quick winterization, and simple maintenance and repair.

To view all options, see the Specification Sheet - Model 350XL

1-350XLFT

The 350XL Double Check Backflow Preventer provides low health hazard protection in potable water applications. The EZSwap® removable pressure vessel provides safe and easy line flushing, quick winterization, and simple maintenance and repair.

To view all options, see the Specification Sheet - Model 350XL

1-350XL

The 350XL Double Check Backflow Preventer provides low health hazard protection in potable water applications. The EZSwap™ removable pressure vessel provides safe and easy line flushing, quick winterization, and simple maintenance and repair.

To view all options, see the Specification Sheet - Model 350XL

114-350XL

The 350XL Double Check Backflow Preventer provides low health hazard protection in potable water applications. The EZSwap™ removable pressure vessel provides safe and easy line flushing, quick winterization, and simple maintenance and repair.

To view all options, see the Specification Sheets - Model 350XL

112-350XL

The 350XL Double Check Backflow Preventer provides low health hazard protection in potable water applications. The EZSwap™ removable pressure vessel provides safe and easy line flushing, quick winterization, and simple maintenance and repair.

To view all options, see the Specification Sheet - Model 350XL

2-350XL

The 350XL Double Check Backflow Preventer provides low health hazard protection in potable water applications. The EZSwap™ removable pressure vessel provides safe and easy line flushing, quick winterization, and simple maintenance and repair.

To view all options, see the Specification Sheet - Model 350XL

2-350XLFT

The 350XL Double Check Backflow Preventer provides low health hazard protection in potable water applications. The EZSwap® removable pressure vessel offers safe and easy line flushing, quick winterization, and simple maintenance and repair.

To view all options, see the Specification Sheet - Model 350XL

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Features And Benefits

  • Patented removable pressure vessel
  • Low-lead design is suitable for drinking water
  • Top-mounted test cocks ease installations
  • Blow Out Flush fitting available
  • Low-lead law compliant
Lead Free
Retrofit or Replacement
MasterSPEC
Zurn Wilkins
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