HZ-MONSTAR Piercing Valve Kit BPV-31, 4-Pack — 1/4" SAE Access Valves & Core Removers for Quick Installation

This kit combines four BPV-31 bullet piercing tap valve assemblies with five 1/4" SAE access valves and the small tools required to install them. Each piercing valve replaces common OEM parts such as AP4502525, BPV31D, GPV14, GPV31, GPV38, GPV56 and MPV31 and fits a variety of refrigeration and HVAC tubing sizes. The components are corrosion-resistant metal with rubber O-rings and include core removers and hex wrenches to streamline installation in tight spaces.

How do these piercing and access valves simplify HVAC service tasks?

The BPV-31 piercing valves let you tap into refrigeration lines without soldering or cutting for many temporary or permanent access needs. The included 1/4" SAE service valves provide a standardized Schrader-style port for vacuum pumps, refrigerant charging, and pressure gauges.

• Piercing valve fits 1/4", 5/16", 3/8" OD tubing for broad compatibility.
• Access valves offer 1/4" SAE thread and Schrader connection for gauges.
• Core removers and O-rings included for leak-resistant service ports.
• Hex key provided so no extra tools are required for installation.

What materials and quality features should I expect from this kit?

All metal parts in the kit are corrosion-resistant to withstand refrigerant system environments and routine exposure to moisture. Access valve caps are copper, the valves are pressure-tested, and each service port includes a rubber O-ring to help maintain a tight seal after installation.

• Corrosion-resistant metal bodies for long-term durability.
• Copper valve caps that resist wear and provide thermal stability.
• Pre-shipped testing ensures functional cores and seals.
• Rubber O-rings included to reduce risk of leaks at the port.

How easy is installation and what clearance or tools are needed?

The BPV-31 piercing valve’s compact footprint requires only about 2 inches of clearance, making it suitable for confined spaces inside refrigeration units or HVAC lines. Installation needs only the included hex key to drive the piercing screw; adapters in each kit help adapt to the tube OD, and the procedure is reversible if the system requires later modification.

• Requires approximately 2 inches of clearance for installation and operation.
• Includes a hex key for piercing screw — no additional tools required initially.
• Adapters provided to match tubing diameter and ensure correct seating.
• Designed for use with standard HVAC service equipment like gauges and pumps.

Who is this for: The HZ-MONSTAR BPV-31 Piercing Valve Kit is for HVAC technicians, refrigeration installers, and competent DIYers who need a compact, tested access solution for charging, vacuuming, or checking pressures on small-diameter refrigerant lines. It’s useful when a quick tap-in is required without major line modification, and when standard 1/4" SAE service ports are needed for tools and gauges.