BPV31 – PIERCING VALVE (1/4″, 5/16″, 3/8″)

A piercing valve clamps onto a sealed copper refrigerant line and punctures a small hole to create a service access port — no brazing needed. The BPV31 fits 1/4″, 5/16″, and 3/8″ OD tubing with a patented gasket seal.

Specs: Fits 1/4″, 5/16″, 3/8″ OD tubing, clamp-on, no brazing, patented gasket seal

Replaces: BPV31, QTM-1, QTM1, STV-1, STV1

Fits: 1/4″, 5/16″, and 3/8″ OD copper refrigerant tubing. Universal — all HVAC brands.

In stock at Open To Public HVAC Parts in Dallas. We test parts at the counter before you buy. Call or text (214) 340-9421.

Specs

• TypeService valve fitting or adaptor

Cross-reference numbers

This part replaces the following OEM and aftermarket numbers:

• 38
• 516
• AP4502525
• BPV31D
• GPV14
• GPV31
• GPV38
• GPV56
• MPV31
• QTM-1
• QTM1
• STV-1
• STV1
• SUPCOBPV31

Not sure if your number matches? Call (214) 340-9421 or bring the old part in — bench-testing is free.

Fits these models

• COMPATIBLEWITHAP4502525
• SUPCOBPV31BULLETPIERCINGVALVE14

What size are HVAC service fittings?

1/4 inch flare is the standard service port on residential equipment. Most of the adaptors and caps here step between 1/4 inch and other sizes so you can connect gauges, a recovery machine or a vacuum pump.

Why do I need a left-hand thread adaptor?

A2L refrigerants - R-454B and R-32 - use LEFT-HAND (reverse) threaded cylinder connections. It is a deliberate keying change so A2L equipment cannot be cross-connected to older refrigerant. Without the adaptor a standard hose simply will not start on the tank.

Does the cap actually matter?

Yes. The cap is the primary seal on a service port, not the Schrader core. The core is a valve; the cap with its gasket is what holds refrigerant in over years. A missing cap is a slow leak you will not find with a sniffer for a long time.

What is a core removal tool for?

Taking the Schrader core out so you can pull a proper vacuum through a full-bore path instead of through a tiny valve. On anything bigger than a small system it is the difference between a real vacuum and a long afternoon.

Male or female - how do I tell?

Male threads are on the outside of the fitting, female on the inside. The listings here spell out each end, for example 1/4" male to 1/2" female, so you can match what you already have.

Do you stock these?

On the shelf at 10226 Plano Rd, Suite 104 in Dallas.