Westinghouse 663864R Low Side Service Valve 3/4 Inch Suction

Product Description

The WESTINGHOUSE 663864R is a low side suction service valve designed for use in split system air conditioning and heat pump applications. This large-stem refrigerant valve features a 3/4 inch stem and serves as the suction-side access point for refrigerant system service, evacuation, and charging. It is installed by licensed HVAC technicians during both initial equipment setup and ongoing refrigerant system maintenance. The valve provides reliable shutoff and service port access on the low-pressure side of the refrigerant circuit, making it a critical component in maintaining system integrity during field service.

This valve is rated for use on 1 to 3-1/2 ton split system air conditioners and 1 to 3 ton heat pumps. It is a direct-fit replacement for compatible WESTINGHOUSE equipment and is appropriate for residential applications where a large-stem suction service valve is required. Compatible model families include S5BA, S5BX, and T5BX equipment. Technicians replacing a damaged or leaking suction valve during a refrigerant system repair will find this part suitable for those specific platforms.

Key Features

• Large-stem 3/4 inch suction connection for low-side refrigerant service access
• Rated for 1 to 3-1/2 ton split system air conditioner applications
• Also rated for 1 to 3 ton heat pump systems
• OEM-style replacement for S5BA, S5BX, and T5BX model families
• Provides shutoff and service port access on the low-pressure side of the refrigerant circuit

Compatibility

Designed for use on WESTINGHOUSE S5BA and S5BX 1 to 3-1/2 ton split system air conditioners and T5BX 1 to 3 ton heat pumps, as specified in manufacturer documentation.

Installation Notes

Installation and replacement of refrigerant service valves must be performed by an EPA Section 608 certified HVAC technician. Recover all refrigerant from the system before removing the existing valve to comply with EPA regulations. Ensure the system is fully de-pressurized and isolated before beginning any valve work. Follow the equipment manufacturer's service manual and applicable local mechanical codes when completing the repair.

Technical Specifications

• Valve Type: Low Side Suction Service Valve
• Stem Size: 3/4 inches
• Stem Configuration: Large
• Application: Split System Air Conditioner, Heat Pump
• Capacity Range (Air Conditioner): 1 to 3-1/2 ton
• Capacity Range (Heat Pump): 1 to 3 ton

Standard Information

• Brand: WESTINGHOUSE
• Manufacturer Part Number: 663864R