Peerless Industrial Group
Peerless Industrial Group Tire Chains Single Bus & RV V-Bar PK2 QG2821
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AirSept
AirSept 72131 A/C Low Side Coupler R134a
Connects to R-134a automotive A/C low-side service ports for system charging and diagnostics
- Designed for R-134a automotive A/C service
- Aluminium construction resists corrosion during refrigerant handling
- 4 in outside diameter fits standard low-side service ports
- Single-piece coupler simplifies connection and disconnection
- AirSept brand trusted by professional technicians
A/C Low Side Coupler for R134a Systems
This aluminium coupler connects to the low-side service port on automotive air-conditioning circuits that use R134a refrigerant. It is a single-piece tool intended for technicians and DIY owners who need to attach gauges or charging hoses during service work. The 4 in outside diameter and 5 in overall size allow it to reach recessed ports on many passenger vehicles.
Build Quality and Day-to-Day Fit
Machined from aluminium, the coupler resists corrosion from refrigerant and shop chemicals while remaining light enough for repeated handling. The knurled body gives a secure grip when tightening or loosening by hand, reducing the chance of rounding the fitting. A single-piece construction means there are no separate seals to lose or misplace between jobs.
Thermals, Noise and Power Draw
As a passive mechanical fitting, the coupler generates no heat, noise or electrical load during use. It simply transmits refrigerant pressure between the system and the service hose without restriction. Normal operation adds no thermal or acoustic burden to the workshop environment.
Highlights
- Designed for R-134a automotive A/C service
- Aluminium construction resists corrosion during refrigerant handling
- 4 in outside diameter fits standard low-side service ports
- Single-piece coupler simplifies connection and disconnection
- AirSept brand trusted by professional technicians
Specifications
| Brand | AIRSEPT |
|---|
Questions about this item
Which R-134a A/C systems accept the low-side coupler with a 4 in. outside diameter?
It connects to the standard low-side service port on any automotive R-134a system, so the 4 in. O.D. body clears surrounding components while the internal quick-connect seats on the factory Schrader valve.
What clearance and thread pattern does the 4 in. O.D. aluminium body need to engage the service port?
The aluminium coupler slips over the low-side port; no wrench flats are required, but you need roughly 5 in. of straight access so the 4 in. O.D. body can push squarely onto the valve without binding.
What is the correct sequence to attach the coupler without venting refrigerant?
Close the handle valve first, press the coupler straight onto the low-side port until it clicks, then open the handle valve — skipping the initial close lets refrigerant escape the moment the seal seats.
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