Home improvement tool for HVAC charging and repair, offering secure puncture and a permanent seal. Lunaobrik BPV31 Bullet Piercing Valve helps professionals and keen DIYers gain safe, repeatable access to common refrigerant lines. Is the clamp-on approach suitable for your system?
⚡ At a Glance
- • Piercing Performance: Clamp-on needle pierces 1/4\", 5/16\", 3/8\" OD pipes without an adapter
- • Best for: HVAC technicians and experienced DIYers needing fast refrigerant line access
- • Not ideal for: Pipe diameters outside 1/4\", 5/16\", 3/8\" or systems requiring alternative access methods
Metal construction and a durable rubber hose resist wear, rust and pressure. 1/2in end fittings match R12, R22 and R502 services, with an adaptable R134A charging hose and readable scale markings for common refrigerants.
Reliable, permanent connection - thanks to clamp-on needle and hex-wrench assembly
Clamp-on needle pierces the tubing and a hex-wrench tightens the fitting to form a leak-proof seal, with around 2 inches clearance required for safe assembly. The procedure converts a pierced fitting into a long-term connection rather than a temporary tap.
A permanent leak-proof connection reduces the need for repeated interventions, useful during long-term servicing and regular maintenance.
Wide refrigerant compatibility - with 1/2in end fittings and an adaptable R134A hose
1/2in end fittings are configured for R12, R22 and R502 systems while an adaptable hose accepts R134A charging, with scale markings for R134, R12 and R22. Connections match legacy and common service refrigerants.
Ability to work across older and newer systems makes servicing mixed fleets faster and avoids swapping multiple specialised adapters.
Workshop-ready durability - with metal body and durable rubber hose
High-quality metal construction resists corrosion and mechanical wear while the rubber hose is designed to tolerate pressure and handling in a workshop setting. The product name includes a 500 PSI figure indicating suitability for higher-pressure tasks.
Robust build supports repeated use under strain, so tools remain reliable through frequent HVAC jobs.
✨ The 4 Key Reasons for Lunaobrik BPV31 Bullet Piercing Valve
- Permanent Leak-Proof Seal - Creates a permanent seal using a simple hex-wrench assembly
- Fast Setup - Requires only around 2 inches clearance and a hex wrench to assemble
- Refrigerant Range - Works with R12, R22, R502 and adapts for R134A charging
- Pressure Resistance - Handles high-pressure workshop tasks, name indicates up to 500 PSI
📋 Technical Details at a Glance
- Category: Home Improvement
- Compatible pipe sizes: 1/4\", 5/16\", 3/8\" OD
- End fittings: 1/2in end fittings for service connections
- Suitable refrigerants: R12, R22, R502 (adaptable for R134A with provided hose)
- Hose type: Durable rubber charging hose, adaptable for R134A
❓ Frequently Asked Questions
Q: Which pipe sizes will the piercing valve fit?
A: Fits 1/4\", 5/16\" and 3/8\" outside-diameter pipes without the need for an adapter.
Q: Which refrigerants are compatible with the fittings and hose?
A: 1/2in end fittings suit R12, R22 and R502 services, and an adaptable hose and scales are present for R134A charging and readings for R134, R12 and R22.
Q: How is a leak-proof seal formed during installation?
A: Clamp-on needle pierces the tube and a hex-wrench is used to tighten the fitting to form a permanent, leak-proof seal, with around 2 inches clearance required for safe assembly.
🏆 Our Verdict
Suited to HVAC technicians and experienced DIYers who need reliable, repeatable access to refrigerant lines. Clamp-on piercing needle, permanent leak-proof seal and broad refrigerant compatibility make it particularly practical for mixed vintage and modern systems. Robust metal construction and straightforward assembly deliver useful long-term value for regular workshop use.
