We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Brass 1/4 inch access valve coupler with hexagonal body and knurled grip

JB Industries

JB Industries A33004 1/4" Brass Access Valve Coupler

SKU CH-59JH-KMAQT

Brass access-valve coupler with 1/4-inch connection for HVAC service work

  • 1/4" brass coupler connects to standard service ports
  • Brass construction resists corrosion in refrigerant systems
  • New JB Industries part ensures reliable sealing
  • Fits 1/4" access valves for HVAC servicing
  • Manufacturer-listed since January 28, 2020

HVAC Brass Access Valve Coupler

The JB Industries A33004 is a 1/4 inch brass coupler designed for heating, ventilation and air conditioning service work. It provides a secure connection point for charging hoses and gauge sets on residential or light commercial systems. Technicians use it to access refrigerant lines quickly during maintenance or repair.

Brass Construction For System Compatibility

Brass material resists corrosion from common refrigerants and lubricants, extending service life in mobile or stationary HVAC units. The coupler threads onto standard 1/4 inch service ports without adapters, reducing leak paths. Its compact form leaves clearance around tight manifold assemblies and crowded engine compartments.

Stable Seal Under Continuous Pressure

The valve core depressor maintains a consistent seal while refrigerant flows during extended charging or recovery sessions. Brass threads resist galling when couplers are repeatedly tightened and removed across multiple jobs. The design sustains operating pressure without deformation or seepage over long service intervals.

Highlights

  • 1/4" brass coupler connects to standard service ports
  • Brass construction resists corrosion in refrigerant systems
  • New JB Industries part ensures reliable sealing
  • Fits 1/4" access valves for HVAC servicing
  • Manufacturer-listed since January 28, 2020

Specifications

BrandJB INDUSTRIES

Questions about this item

How does the brass construction hold up under repeated refrigerant charging cycles?

Brass resists corrosion from refrigerants and lubricants, so the coupler maintains seal integrity through many connect-disconnect cycles without galling or thread damage.

Does the coupler body get hot enough to burn skin during extended recovery sessions?

Brass conducts heat quickly, so the body will reach line temperature; wear gloves when handling it during long recovery or charging jobs.

What thread size must my manifold gauge hose have to connect to this coupler?

The coupler uses a standard 1/4-inch SAE flare thread, matching most HVAC manifold hose ends.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.