XPARTCO BPV-31 Refrigerator Refrigerant Piercing Valve / Line Tap Valve Kit
The XPARTCO BPV-31 is a universal bullet piercing tap valve (line tap valve) used to quickly access a sealed refrigerant line on refrigerators, freezers, window air conditioners, dehumidifiers, and other HVAC systems — without soldering or brazing. The valve clamps around a copper refrigerant line and, when the valve stem is tightened with the included hex key, a hardened piercing needle punctures the tubing to create an access port. This lets a technician connect a charging hose or gauge to check pressure, pull a vacuum, or add refrigerant to a system that has no factory service port. It's a staple tool for appliance service and DIY refrigerator/freezer repair.
Fits 1/4", 5/16", and 3/8" outside diameter copper pipes with the included adapters. The access port connection is a 1/4" male flare fitting. Rated to 500 PSI maximum, with a patented permanent gasket providing over 180 inch-lbs of sealing force — around 50 times the sealing area of a standard O-ring type valve — pressure tested at 250°F. Corrosion-resistant metal (zinc alloy) construction with a piercing needle engineered for concentricity and hardness to seat perfectly every time. Non-positional mounting requires no separate adapter valve and only 2" of clearance for installation. Each kit includes the piercing valve, a hex key wrench, and 2 adapters. It replaces AP4502525, BPV31, BPV31D, GPV14, GPV31, GPV38, GPV56, and MPV31.
Quick Answer
The XPARTCO BPV-31 Refrigerant Piercing Valve Kit taps into a sealed copper refrigerant line to add refrigerant, check pressure, or pull a vacuum — no soldering required. Fits 1/4", 5/16", and 3/8" OD pipes. 1/4" male flare port connection. 500 PSI max, patented gasket (50x the sealing area of an O-ring). Zinc alloy metal. Includes piercing valve, hex key, and 2 adapters; only needs 2" clearance. Replaces AP4502525, BPV31, BPV31D, GPV14, GPV31, GPV38, GPV56, MPV31. Not suitable for R410a systems.
Common Uses This Kit Serves
Adding refrigerant to a refrigerator or freezer that has no factory service port
Checking system pressure on a sealed refrigerant line for diagnostics
Pulling a vacuum on a system during service
Recharging window air conditioners and dehumidifiers
Confirming whether a sealed system has lost its refrigerant charge (leak diagnosis)
Providing temporary or service access to copper refrigerant tubing without brazing
Reviving a garage/shop refrigerator or freezer that has slowly lost its charge
Accessing R-12, R-22, R-134a, and other compatible refrigerant systems (NOT R410a)
Cross Reference Information
Part numbers can change over a product's lifecycle as manufacturers update designs or release new appliance models. For your convenience, we've included any known superseded, alternate, or cross-reference part numbers that match this item.
Replaces Part Numbers
This bullet piercing tap valve directly replaces the following OEM and cross-reference part numbers:
BPV-31, BPV31, BPV31D, AP4502525, GPV14, GPV31, GPV38, GPV56, MPV31
The BPV-31 is a universal valve that covers the GPV-series (GPV14, GPV31, GPV38, GPV56) and MPV31 across the pipe sizes they individually served. Contact our support team if you need help confirming the correct valve for your line size.
Compatibility
This bullet piercing valve is a universal tool compatible with sealed refrigerant systems using copper tubing, including:
Refrigerators and freezers — all major brands with 1/4", 5/16", or 3/8" OD copper refrigerant lines
Window air conditioners — for recharging and pressure checks
Dehumidifiers — sealed refrigerant systems
Other HVAC systems with compatible copper line sizes
Refrigerant compatibility — works with R-12, R-22, R-134a and other common refrigerants
Important — NOT for R410a Systems: This BPV-31 piercing valve is NOT rated for R410a refrigerant systems, which operate at significantly higher pressures than the valve's design allows. Using it on an R410a system is unsafe. Before use, confirm your line's outside diameter (1/4", 5/16", or 3/8") and select the correct included adapter. Verify the pipe size before installation.
Key Features
Bullet piercing tap valve — taps a sealed copper refrigerant line to create an access port without soldering or brazing
Fits 1/4", 5/16", and 3/8" outside diameter copper pipes (with included adapters)
1/4" male flare access port connection for charging hoses and gauges
500 PSI maximum pressure rating
Patented permanent gasket — over 180 inch-lbs of sealing force, ~50 times the sealing area of a standard O-ring type valve; pressure tested at 250°F
Piercing needle engineered for concentricity and hardness to seat perfectly every time
Corrosion-resistant zinc alloy metal construction — won't rust or wear out over time
Non-positional mounting — no separate adapter valve required, installs in any orientation
Compact design needs only 2" of clearance for installation and use
Each kit includes: 1 piercing valve, 1 hex key wrench, 2 adapters
Replaces AP4502525, BPV31, BPV31D, GPV14, GPV31, GPV38, GPV56, and MPV31
NOT suitable for R410a refrigerant systems
Product Specifications
Part Number
XPBPV-31
Part Type
Bullet Piercing Tap Valve (Line Tap Valve Kit)
Condition
Aftermarket Replacement
Application
Refrigerators, Freezers, Window AC, Dehumidifiers, HVAC (sealed copper lines)
Compatible Pipe Sizes
1/4", 5/16", 3/8" outside diameter
Port Connection
1/4" Male Flare
Maximum Pressure
500 PSI
Sealing Force
180+ inch-lbs (patented gasket, ~50x O-ring sealing area)
Pressure Tested
250°F
Material
Corrosion-resistant zinc alloy metal
Mounting
Non-positional, 2" clearance required
Kit Includes
1x Piercing Valve, 1x Hex Key, 2x Adapters
Not Compatible With
R410a refrigerant systems
Installation Notes
⚠️ Refrigerant Safety Warning Working with sealed refrigerant systems can expose you to pressurized refrigerant, which can cause frostbite, eye injury, and other harm. Wear safety glasses and protective gloves before piercing any line. Refrigerant handling may be regulated in your area — certain refrigerants require EPA certification (in the US) to purchase and handle. Never vent refrigerant to the atmosphere. This valve is NOT rated for R410a systems (too high pressure). If you're not experienced with refrigerant systems, have this work done by a qualified HVAC or appliance technician.
⚠️ Installation Steps — Clean the Line First Put on safety glasses and protective gloves. Identify the copper line you want to tap and confirm its outside diameter (1/4", 5/16", or 3/8") so you can select the correct included adapter. Clean the section of pipe where the valve will mount to prevent debris from entering the refrigerant line. Ensure the composite seal "O" ring/gasket is properly in place inside the valve. Place the two halves of the valve saddle around the pipe using the appropriate adapter insert for your pipe size. Install and evenly tighten the socket-head screws to clamp the valve body firmly around the pipe. To pierce the line, turn the valve stem clockwise with the included hex key until the needle punctures the tubing, then back the stem out (counterclockwise) to open the port and allow flow. To connect a gauge or charging hose: remove the cap, attach your hose to the 1/4" flare port, and open the valve by turning the stem counterclockwise. When finished, close the valve (turn the stem clockwise) BEFORE disconnecting the hose, then reinstall the protective cap. Note: the compact valve needs only 2" of clearance around the pipe. Tools needed: Included hex key wrench, safety glasses, protective gloves. (Note: to attach a gauge directly to the BPV, a retrofit valve adapter may be required — not included.)
Frequently Asked Questions
What is a bullet piercing valve used for?
A bullet piercing valve (line tap valve) lets you tap into a sealed copper refrigerant line to create an access port — without cutting, soldering, or brazing the line. Most household refrigerators and freezers are sealed systems with no factory service port, so if you need to check the refrigerant pressure, pull a vacuum, or add refrigerant, a piercing valve gives you that access quickly. It clamps around the pipe, and a needle pierces the tubing when you tighten the valve stem. It's commonly used in appliance repair and HVAC service, and by DIYers reviving a garage refrigerator or freezer that has lost its charge.
Which pipe sizes does this fit?
The BPV-31 fits 1/4", 5/16", and 3/8" outside diameter copper pipes using the included adapters. Before installing, measure or confirm your refrigerant line's outside diameter and select the matching adapter insert. Getting the size right is essential for a proper seal — an incorrectly sized adapter won't clamp tightly and can leak. If you're not sure of your line size, measure the outside diameter of the copper tubing with calipers or a pipe gauge.
Can I use this on an R410a system?
No — the BPV-31 is NOT rated for R410a refrigerant systems. R410a operates at significantly higher pressures than older refrigerants like R-12, R-22, and R-134a, and exceeds the safe working pressure of this valve (500 PSI max). Using it on an R410a system is unsafe and could result in valve failure or refrigerant release. This valve is appropriate for lower-pressure systems using R-12, R-22, R-134a, and similar refrigerants. For R410a systems, use service equipment specifically rated for R410a pressures.
Is a piercing valve a permanent solution?
Piercing valves are best thought of as a service-access tool rather than a permanent fixture. They work reliably for tapping into a line to diagnose, vacuum, or charge a system, and the BPV-31's patented gasket provides a much stronger seal than basic O-ring valves. However, for a long-term permanent service port, many technicians prefer to cut the line and braze in a proper Schrader service port. Some technicians have concerns about the very long-term sealing of any piercing valve left permanently on a line. If you leave the valve installed, make sure the stem is closed and the cap is in place, and check periodically for leaks.
Do I need EPA certification to add refrigerant?
In the United States, handling many refrigerants (and purchasing them) requires EPA Section 608 certification, and it is illegal to intentionally vent refrigerant to the atmosphere. Regulations vary by refrigerant type and jurisdiction. The piercing valve itself is a tool that anyone can install, but the refrigerant handling that follows may be regulated. If you're a DIYer, research the rules that apply to your specific refrigerant and location, or have the refrigerant work done by a certified technician. Always recover refrigerant properly rather than venting it.
Is this an OEM or aftermarket part?
This is an aftermarket universal service tool built to OEM-equivalent quality standards. The BPV-31 is a universal industry-standard bullet piercing valve design (also sold as Supco BPV31 and equivalent), manufactured from corrosion-resistant zinc alloy to match the fit, 1/4"/5/16"/3/8" pipe compatibility, 1/4" flare port, 500 PSI rating, and patented-style sealing gasket of the standard BPV-31 line tap valve. It replaces AP4502525, BPV31D, GPV14, GPV31, GPV38, GPV56, and MPV31.
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