Refrigerant Manifolds | McMaster-Carr

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12 Products

Air Conditioner Charging and Testing Manifolds

Monitor refrigerant pressure with analog gauges when servicing air conditioning systems. All manifolds have double O-ring piston valves. Manifolds with sight glass allow you to view liquid levels.

Replacement gauges are sold separately.

Optional gauge cover sets (sold separately) include one blue and one red gauge cover. They are not for use with the manifolds for R-410A refrigerant.

Two Valve

Four Valve

		Hose
For Refrigerant Number	Valve Material	Connection	Lg., ft.	Dia.	Color	Includes		Each
Two Valve
R-134A	Brass	1/2"-16 Acme × 7/16"-20 UNF × 7/16"-20 UNF	6	2 1/2"	One Blue and One Red	__	0000000	0000000
R-134A, R-404A, R-407C	Aluminum	1/4 UN/UNF (SAE 45°) × 1/4 UN/UNF (SAE 45°) × 1/4 UN/UNF (SAE 45°)	5	3 1/8"	One Blue and One Red	Sight Glass	0000000	000000
R-22, R-404A, R-410A	Aluminum	1/4 UN/UNF (SAE 45°) × 1/4 UN/UNF (SAE 45°) × 1/4 UN/UNF (SAE 45°)	5	3 1/8"	One Blue and One Red	Sight Glass	0000000	000000
R-410A	Brass	1/4 UN/UNF (SAE 45°) × 1/4 UN/UNF (SAE 45°) × 1/4 UN/UNF (SAE 45°)	5	2 1/2"	One Blue and One Red	__	0000000	000000
Four Valve
R-134A, R-404A, R-407C	Aluminum	1/4 UN/UNF (SAE 45°) × 1/4 UN/UNF (SAE 45°) × 1/4 UN/UNF (SAE 45°) × 3/8 UN/UNF (SAE 45°)	5	3 1/8"	One Blue and One Red	Sight Glass	0000000	000000
R-22, R-404A, R-410A	Aluminum	1/4 UN/UNF (SAE 45°) × 1/4 UN/UNF (SAE 45°) × 1/4 UN/UNF (SAE 45°) × 3/8 UN/UNF (SAE 45°)	5	3 1/8"	One Blue and One Red	Sight Glass	0000000	000000

Replacement Gauges

For Refrigerant Number	Gauge Dia.	Gauge Lens Material	Choose a Gauge Color		Each
R-134A	2 1/2"	Plastic	Blue, Red	0000000	000000
R-134A, R-404A, R-407C	3 1/8"	Plastic	Blue, Red	0000000	00000
R-22, R-404A, R-410A	3 1/8"	Plastic	Blue, Red	0000000	00000
R-410A	2 1/2"	Plastic	Blue, Red	0000000	00000

Optional Gauge Cover Sets

For Manifold Type	Includes		Each
Two Valve, Four Valve	One Blue Cover, One Red Cover	0000000	000000

Digital Air Conditioner Charging and Testing Manifolds

Monitor refrigerant pressure on an LCD when servicing air conditioning systems. This manifold automatically calculates how much refrigerant is needed in a system based on measurements taken with its thermocouples.

			Display
For Refrigerant Number	Valve Material	Pipe Connection	Type	Size	Batteries Included		Each
Three Valve
R-12, R-134A, R-22, R-404A, R-407C, R-410A, R-502	Brass	1/4 NPT × 1/4 NPT × 1/4 NPT	Digital	5"	Yes	0000000	0000000