Boltigen Refrigerator Freon Recharge Hose Kit - R134a/R12/R22 Universal Refill, BPV31 Piercing Valves & Gauge (White)

This compact kit includes all the fittings and a pressure gauge needed to attach to refrigerant cans and household refrigerator service ports, making it useful for appliance technicians and DIYers who maintain cooling systems. Components are metal and brass where it matters for leak resistance and durability, and the gauge reads common refrigerants so you can monitor pressure while recharging.

How do I connect the kit to a puncture-style refrigerant can?

Attach the R134a self-sealing adapter to the puncture-style can mouth, then connect the hose’s puncture tap to the adapter. The self-sealing adapter keeps the can closed when disconnected, and the brass fittings reduce leak risks during the transfer.

• Fit the R134a self-sealing adapter onto the can’s puncture valve
• Screw the puncture tap into the adapter until secure
• Open the valve slowly and watch the gauge to control flow

Which pipe sizes do the BPV31 bullet piercing valves fit?

The BPV31 piercing valves in this set are designed to fit common refrigerator tubing with 1/4", 5/16", and 3/8" outer diameters. They provide a quick, temporary service access point for charging without replacing factory fittings.

• Compatible with 1/4", 5/16", and 3/8" OD refrigerant lines
• Replaces common part numbers like AP4502525 and GPV31 types
• Bullet-style design pierces tubing for immediate access

What does the gauge measure and why is it useful?

The integrated gauge reads pressures appropriate for R134a, R12, R22 and R502 systems so you can monitor charge level while topping up refrigerant. Watching the gauge helps avoid overcharging and allows you to aim for manufacturer-recommended operating pressures.

• Multi-refrigerant scale for broader compatibility
• Gauge attached to the charging hose for live pressure feedback
• Metal gauge housing for improved durability and visibility

Who is this for? This Boltigen charge hose kit is aimed at appliance repair professionals, HVAC technicians, and experienced DIYers familiar with refrigerant handling. It’s best suited for people who understand safe refrigerant practices, can identify correct service ports and pressures, and have the tools and permits required in their region to work with refrigerants. Do not use this kit if you lack refrigerant-handling training or necessary legal certifications—check local regulations before refilling refrigerants.