Z-flex 2SVSRTX05 5 Inch Horizontal Termination Box Cat Iii

Product Description

The Z-FLEX 2SVSRTX05 is a 5-inch horizontal termination box designed for single-pipe, horizontal vent exhaust applications on Category III stainless steel venting systems. Built from AL 29-4C stainless steel and rated to UL 1738 standards, this termination box fits 5-inch round rigid vent pipe and is suitable for natural gas or liquid propane appliances. The gasketed, fusion-welded construction eliminates the need for sealant, reducing installation time and eliminating callbacks from leaking joints. Licensed HVAC technicians install this component as the exterior exit point of a horizontal vent run.

This termination box is engineered for Category II, III, and IV gas-burning appliances where the maximum vent gas temperature at the appliance outlet does not exceed 550 degrees F. Typical applications include unit heaters, high-efficiency gas furnaces, and high-efficiency gas water heaters vented through a single-wall, horizontal pipe configuration. A minimum clearance of 3 inches to combustibles is required. Always verify local codes before beginning installation.

Key Features

• 5-inch round rigid pipe end for Category III stainless steel single-wall systems
• UL 1738 rated and AL 29-4C stainless steel construction
• Gasketed connections with fusion-welded pipe seams — no sealant required
• Airtight seam with smooth interior finish for consistent airflow
• Rated for natural gas and liquid propane appliances
• Highest pressure rating in its category — exceeds industry standard by more than five times

Compatibility

Engineered for use with Category II, III, and IV gas-burning appliances, including unit heaters, high-efficiency gas furnaces, and high-efficiency gas water heaters, where single-pipe horizontal venting with 5-inch round rigid Category III stainless steel pipe is specified.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with the appliance manufacturer instructions and all applicable local codes. Shut down the appliance and allow the vent system to cool completely before servicing or connecting any vent components. Maintain a minimum 3-inch clearance to combustibles throughout the horizontal vent run. Always check local authority having jurisdiction requirements before finalizing the venting configuration.

Technical Specifications

• Pipe Diameter: 5 inches
• Vent Configuration: Single pipe, horizontal
• Appliance Category: Category II, III, and IV gas-burning appliances
• Maximum Vent Gas Temperature: 550 degrees F (288 degrees C)
• Clearance to Combustibles: 3 inches minimum
• Material: AL 29-4C Stainless Steel
• Listing: UL 1738
• Fuel Type: Natural Gas, Liquid Propane
• Connection Type: Gasketed, fusion-welded seams

Standard Information

• Brand: Z-FLEX
• Manufacturer Part Number: 2SVSRTX05