HZ-MONSTAR Piercing Valve Kit BPV-31, 4-Pack Refrigerator Tap Valves with 5 Service Valves — Corrosion-Resistant, Ready-to-Use

HZ-MONSTAR BPV-31 Piercing Valve Kit is a 4-pack bullet-style refrigerator tap valve set plus five 1/4" SAE service access valves designed for quick HVAC access, charging, and pressure checks.

This kit combines four compact BPV-31 bullet piercing tap valves with five 1/4" SAE access/service valves and the basic tools needed for installation. Made from corrosion-resistant metal with tested rubber o-rings and copper caps, the kit replaces common OEM part numbers and fits standard 1/4", 5/16", and 3/8" outside diameter tubing. It’s intended for technicians and DIYers who need a reliable way to tap refrigeration or air conditioning lines for vacuuming, charging, or system diagnostics.

How do these piercing tap valves make HVAC service work easier?

The bullet piercing design creates a sealed access point without cutting or replacing a long section of tubing, so technicians can quickly connect gauges or charging hoses. Each piercing valve includes a hex key for installation and requires only about 2 inches of clearance, making it practical in tight equipment bays.

• 4-pack BPV-31 piercing valves for repeated or multi-unit jobs
• Includes hex key and two adapters per kit for immediate use
• Compact footprint — installs in roughly 2 inches of clearance
• Replaces common OEM codes like AP4502525 and GPV31

What tubing sizes and fittings are supported?

The piercing valves are compatible with 1/4", 5/16", and 3/8" outside diameter tubing, while the included service valves are 1/4" SAE thread to 1/4" O.D. stems. This covers the most common refrigeration and small commercial HVAC lines for routine service tasks.

• BPV-31 fits 1/4", 5/16", 3/8" OD pipes
• 5 service valves: 1/4" SAE x 1/4" O.D. stems, 0.027" tube thickness
• Adapters included to match common gauge and hose fittings
• Schrader-style cores and core remover provided for valve service

Are these valves durable and safe for repeated use?

Components are made from corrosion-resistant metal and each valve assembly is bench-tested before shipping. Service valve caps are copper with internal rubber o-rings to maintain a seal, and the piercing valves include core removal capability for maintenance.

• Corrosion-resistant metal construction for longer life
• Copper caps with rubber o-rings for reliable sealing
• Core remover included for valve maintenance and replacement
• 100% tested units to ensure functional integrity on arrival

How quickly can I install and start using a tapping valve?

Installation is straightforward: position the piercing valve on the tube, tighten using the supplied hex key to puncture and seal, then attach gauges or hoses. The design minimizes downtime — most installs take only a few minutes, depending on access to the tubing.

• Hex key included for immediate installation
• Minimal tools required — no tube replacement needed
• Suitable for tight spaces thanks to compact form factor
• Ready for vacuuming, charging, and pressure checks upon install

Who is this for: The HZ-MONSTAR BPV-31 kit is aimed at HVAC technicians, refrigeration service professionals, and capable DIY users who need reliable, tested access ports for vacuuming, charging, or pressure diagnostics. It’s especially useful for field service on refrigerators, display cases, small commercial AC units, and systems where quick, repeatable tapping is required without extensive tubing modification.