Xylem-Bell & Gossett UBY-1/2 Combination Ball Valve and Y-Strainer 1/2" NPT

The Bell & Gossett UBY-1/2 is a 1/2" NPT combination full-port ball valve and inline Y-strainer designed for use in HVAC hydronic systems, including heating and cooling coil hook-up applications. It integrates shut-off isolation and fluid filtration into a single, compact brass body, reducing installation time and the number of individual components required.

The UBY features a full-port, chrome-plated brass ball for unrestricted flow and positive shut-off, allowing isolation of coils or other system components for maintenance or replacement without draining the entire system. The integrated wye (Y) strainer is equipped with a 20-mesh stainless steel screen that captures particulate and debris to protect downstream equipment and keep coils operating at peak efficiency.

Key Features:

• 1/2" NPT connection with fixed inlet and union outlet for easy installation and disconnect
• Full-port chrome-plated brass ball for unrestricted flow
• Integrated 20-mesh stainless steel Y-strainer screen
• PTFE ball seals and stainless steel stem for durability and leak-free operation
• EPDM O-rings for reliable sealing across a wide temperature range
• Hose-end drain valve for convenient system purging and servicing
• Pressure/temperature (P/T) port for system commissioning and diagnostics
• Optional bypass port tap (1/2" FNPT) for additional accessories
• Brass body construction for corrosion resistance

Construction Details:

• Body: Brass
• Ball: Full-port, chrome-plated brass
• Ball Seal: PTFE
• Stem: Stainless steel (explosion-proof design)
• O-Rings: EPDM
• Strainer Screen: 20-mesh stainless steel

The UBY-1/2 is part of the Bell & Gossett coil hook-up system and is compatible with Model UBV ball shut-off valves and Model UA union accessories for complete coil connection assemblies. It is a Xylem brand product engineered for long-term reliability in commercial and residential HVAC hydronic systems.