Fieldpiece GS322F 3-Port Analog Refrigerant Manifold Gauge Set — Sight Glass, Swappable Hose Holders, High-Grip Knobs

Fieldpiece GS322F is a three-port analog refrigerant manifold gauge set with an integrated sight glass, swappable hose holders and durable controls for reliable field diagnostics.

The GS322F brings a straightforward, mechanical solution for HVACR technicians who need clear pressure readings, visible refrigerant flow and a toolkit-friendly design on service calls. Built to withstand daily use, this manifold combines an easy-to-read analog interface with practical features like multiple refrigerant saturation rings and changeable hose fittings to match common job requirements.

How does the sight glass speed up troubleshooting?

The built-in sight glass gives a direct visual of refrigerant moving through the manifold so techs can confirm flow, spot bubbles and verify liquid presence without extra tools. It’s especially useful during charging or recovery when you need a quick on-site check.

• Immediate visual confirmation of refrigerant flow and bubbles
• Reduces guesswork during charging and recovery
• Helps catch moisture or oil presence early

What makes this set durable for field use?

Fieldpiece engineered the GS322F with a rubberized protective housing and high-grip valve knobs to resist drops, grime and rough handling. Piston valves and robust fittings maintain reliable control and long service life in construction or service environments.

• Rubber overmold protects gauges and core components
• High-grip knobs allow smooth operation with gloves
• Piston valves deliver consistent, precise control

Which refrigerants and fittings does it support?

The manifold ships with four refrigerant saturation temperature rings—covering common service blends—so you can quickly match pressure to temperature. Hose holders are swappable between the standard 1/4" and optional 5/16" sizes to fit the hoses and service valves you encounter most often.

• Saturation rings for R22, R32, R454B and R410A
• Rotating pressure marker for quick reference alignment
• Swappable hose holders to adapt to job-specific hose sizes

How does the GS322F integrate into everyday workflow?

The analog display and simple controls make the GS322F fast to set up and easy to use for common diagnostics, leak checks and charging tasks. Its tactile knobs and clear markings minimize training time while the sight glass accelerates decision-making on-site.

• Quick analog readings without battery dependence
• Easy-to-read markings and temperature rings reduce calculation steps
• Compact footprint fits in service bags and on gauges racks

Who is this for: The Fieldpiece GS322F is aimed at HVACR technicians, contractors and maintenance teams who prefer a dependable, non-electronic manifold for everyday diagnostics and charging. It’s suited to pros who need a rugged tool with straightforward readings, visible refrigerant verification and flexible hose compatibility for versatile field work.