1/4" - 3/8" Dive Valve Line Tap

DiversiTech QTM-1 In-Line Piercing Valve – Reliable Access for Refrigerant Charging

The DiversiTech QTM-1 is an in-line piercing valve engineered to provide dependable refrigerant access for HVAC maintenance and service. Designed for use on copper or aluminum tubing ranging from 1/4" to 3/8" outside diameter, this valve offers efficient system entry without the need for line depressurization or flame-based methods.

Purpose-Built for HVAC Professionals

With its robust metal body and precision piercing needle, the QTM-1 valve delivers quick, reliable access to refrigerant lines during charging, evacuation, or diagnostic procedures. This unit is built with refrigerant-resistant O-rings and an automatic back-seating needle that ensures secure sealing once service is complete, minimizing refrigerant loss and maintaining system integrity.

Key Features

• Size Compatibility: Accommodates 1/4", 5/16", and 3/8" OD tubing
• Uniport Design: Single-port connection simplifies installation and service
• Back-Seating Needle: Automatically retracts to seal the system after servicing
• Secure Attachment: Fastens to tubing with two socket-head screws (hex key included)
• Sealing System: Equipped with refrigerant-resistant O-rings to prevent leaks

Application Notes

The QTM-1 is suitable for R-22, R-134a, and similar refrigerants commonly used in legacy residential and light commercial systems. It’s not intended for permanent service ports but is ideal for temporary system access during routine maintenance or repair. Its compact design makes it useful in tight service locations where traditional fittings may not be practical.

Installation Considerations

This piercing valve should be installed by trained HVAC professionals. While straightforward to use, proper torque application and alignment are essential to ensure a clean pierce and leak-free seal. The valve is installed using the included hex key and tightened onto the pipe with two screws, ensuring a firm grip before piercing the line. Once service is complete, the valve can be back-seated to maintain pressure integrity.

Professional Use Case

Contractors benefit from the QTM-1’s simple design and reliable performance in field applications, particularly during service calls where quick refrigerant access is needed without disruption to the line. Its reusability and compatibility with various tubing sizes make it a staple in technician toolkits.

Technical Specifications

• Product Code: QTM-1
• Material: Corrosion-resistant metal body with polymer sealing elements
• Compatible Tubing Sizes: 1/4", 5/16", 3/8" OD copper or aluminum
• Port Type: Uniport
• Seals: O-rings rated for use with refrigerants

Trustworthy Field Solution

For quick, effective refrigerant system access, the DiversiTech QTM-1 delivers performance that HVAC professionals rely on. Its rugged design and service-friendly features ensure it remains a go-to solution for technicians working with older or serviceable systems without existing access ports.