R-134a Quick Coupler Set
R-134a Quick Coupler Set
R-134a Quick Coupler Set
R-134a Quick Coupler Set
Black Knight Series logo with a helmeted figure on a white background
Black Knight
Quick Coupler

HCQC90SETR-134a quick coupler set — high & low-side dual-locking couplers for leak-free A/C service

SKU · 22-0079MPN · HCQC90
A2L SafeR-134aHigh + Low Side500 PSI
$4.87
Out of stock· backorder available
Direct from the manufacturer — Miami HQ, full warranty & tech support included.
Out of stock
Designed
In Miami, USA
Warranty
1-Year Full
Ships
1–2 Days
  • Field-tested by working HVAC technicians
  • Free returns within 30 days
  • Direct manufacturer support — Miami HQ
  • ORDER IN THE NEXT — AND IT SHIPS TODAY FROM MIAMI
R-134aREADY
R-134a Quick Connect

Matched high- and low-side couplers that push-to-connect on standard R-134a automotive and HVAC service ports

500PSI
500 PSI Rated

High-pressure dual-locking valves rated to 500 PSI for confident, leak-free service

DUALLOCK
Dual-Locking Seal

Dual-locking couplers seat with one hand and seal leak-free under pressure

HCPRODESIGNED
Built to Black Knight Spec

HCPRO-designed to Black Knight specifications and quality-control standards

Why Black Knight

R-134a ready.

500 PSI.

Leak-free, one-handed.

The HCPRO Black Knight HCQC90SET R-134a quick coupler set gives you matched high- and low-side couplers with dual-locking, 500 PSI, SAE-certified connections for fast, leak-free automotive A/C service.

Leak-free R-134a connections

The HCQC90SET pairs a high-side and a low-side coupler sized for R-134a service ports. Dual-locking valves seat with one hand and hold a leak-free seal at up to 500 PSI, so you stop losing refrigerant at the connection and stop fighting a coupler that won't seat.

Built for high-pressure service

Corrosion-resistant steel construction handles 500 PSI and a wide temperature range, and the set meets SAE J2196 / J639 standards. A reinforced 18" hose gives you flexible, kink-resistant reach into a tight engine bay.

One-handed, time-saving operation

Quick-connect couplers push on and lock without tools, so recovery, evacuation and charging on R-134a systems go faster. An ergonomic, no-slip grip keeps connections quick through a long day of A/C work.

Full Product Description

The HCPRO Black Knight HCQC90SET is an R-134a quick coupler set — matched high- and low-side dual-locking couplers for fast, leak-free automotive and HVAC A/C service.

Key features

  • Matched high-side and low-side couplers for R-134a service ports
  • Dual-locking valves seat one-handed and seal leak-free to 500 PSI
  • SAE J2196 / J639 certified, corrosion-resistant steel
  • 18" reinforced, kink-resistant hose for tight engine bays
  • HCPRO-designed to Black Knight specifications

The R-134a coupler set for fast recovery, evacuation and charging on automotive A/C.

Technical specifications

Coupler specs for fast, leak-free R-134a service.

HCPRO Black Knight HCQC90SET — matched high- and low-side R-134a couplers, dual-locking, 500 PSI, SAE J2196/J639. One-handed push-to-connect for automotive and HVAC A/C service. HCPRO-designed to Black Knight specifications.

Type
R-134a quick coupler set (high + low side)Push-to-connect couplers for automotive & HVAC A/C service
Refrigerant
R-134aStandard R-134a automotive and HVAC service ports
Couplers
High-side + low-side, dual-lockingOne-handed push-to-connect, leak-free seat
Pressure rating
500 PSIHigh-pressure rated for confident service
Hose
18" reinforcedFlexible, kink-resistant reach
Certification
SAE J2196 / J639Meets industry A/C service standards
Body
Corrosion-resistant steelDurable build for daily shop use
Brand
HCPRO Black KnightThe HCPRO professional HVAC service tool line
Country of origin
ChinaHCPRO-designed in Miami to Black Knight specifications, built to spec and quality-controlled to OEM standards
Warranty
1-year limitedCovers manufacturing defects under normal professional use
In the box

Both couplers, ready for R-134a service.

R-134a Quick Coupler Set
High-side R-134a quick couplerDual-locking, push-to-connect, 500 PSI rated
Low-side R-134a quick couplerMatched to the low-side service port
18" reinforced hoseFlexible, kink-resistant reach into tight engine bays
Customer reviews

What working techs say after putting it on the truck.

12,000+ HVAC pros served
4.9★ Average rating
94% Repeat buyers

Replace this with a real customer quote — how the couplers seated one-handed, held a leak-free seal, and sped up R-134a A/C service.

Marcus T.HVAC TECH · MIAMI, FL
On HCPRO Black Knight R-134a Quick Coupler Set

Replace this with a real customer quote — how the couplers seated one-handed, held a leak-free seal, and sped up R-134a A/C service.

Jorge R.REFRIGERATION CONTRACTOR · ATLANTA, GA
On HCPRO Black Knight R-134a Quick Coupler Set

Replace this with a real customer quote — how the couplers seated one-handed, held a leak-free seal, and sped up R-134a A/C service.

Derrick W.COMMERCIAL HVAC · PHOENIX, AZ
On HCPRO Black Knight R-134a Quick Coupler Set
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Tools that pair with the HCQC90SET.

Common questions

Answers from the warehouse floor.

Still stuck? Call our techs at 305-720-0044.

Does HCPRO warranty the products?

Yes — every HCPRO Black Knight product ships with a 1-year limited warranty against manufacturing defects under normal professional use. See our full warranty terms.

What does this coupler set fit?

It fits standard R-134a high- and low-side service ports on automotive and HVAC A/C systems. For R-1234YF systems, use the HCPRO R-1234YF quick coupler set instead — the port standards are different.

What pressure is it rated for?

The couplers are rated to 500 PSI with dual-locking valves, and the set meets SAE J2196 / J639 standards — built for the pressures you see during R-134a recovery, evacuation and charging.

How do the quick couplers connect?

Push the coupler onto the service port and it locks one-handed; the dual-locking valve seats and seals leak-free under pressure. Release the lock collar to disconnect. No tools required.

Can I return an unused set?

Yes — free returns within 30 days for unused items in original packaging. Read our full return policy.