Manifolds & Gauges

Manifolds and gauges help HVAC and oil burner service professionals monitor pressure, temperature, and vacuum readings while performing system diagnostics, charging, evacuation, recovery, testing, and adjustment. This category includes manifold and gauge sets, individual gauges, refrigerant hoses, and replacement components used to connect, read, protect, and maintain compatible service equipment.

Product Display:
Helpful Buying Guide

Choose Manifolds and Gauges for the Service Task

Select service tools and replacement parts based on the type of work, the compatible connection or gauge size, and the features that support the readings or refrigerant handling needs of the job. The available products cover ammonia service, refrigerant charging and recovery, vacuum testing, hose connections, gauge protection, and manifold maintenance.

Visual Guide

Popular examples in this category

Ammonia Manifold and Gauge SetAmmonia Manifold and Gauge SetWBB54418Four-Hose HVAC Manifold with 60 in. RYB HosesFour-Hose HVAC Manifold with 60 in. RYB HosesWBB735718Liquid-Filled Vacuum Pump Test Gauge, 0–30 HgLiquid-Filled Vacuum Pump Test Gauge, 0–30 HgWBB89544072-Inch Blue 1/4-Inch Refrigerant Hose with Low-Loss Fitting72-Inch Blue 1/4-Inch Refrigerant Hose with Low-Loss FittingWBB735682
Use Cases

Match the tool to the task

Use manifold sets for charging, diagnostics, evacuation, and recovery; choose a vacuum test gauge for oil burner pump testing; and use individual gauges to monitor compatible system readings.

How to Choose

Check compatibility and working setup

Compare refrigerant application, hose diameter and length, fitting style, gauge size, port connection, and whether the work calls for a standard manifold, four-hose arrangement, or replacement part.

Applications

Support common service work

Available products support HVAC and refrigeration service, air-conditioning work, critical charging systems, R717 ammonia systems, and oil burner service.

Additional Info

Consider protective and maintenance items

Protective gauge boots cushion compatible 3-1/8-inch gauges, while replacement gaskets and feed screws help maintain compatible charging hoses and manifolds.

4 hosesMulti-connection setup

A four-hose manifold supports connections for service work without switching hoses.

0–30 HgVacuum range

The liquid-filled vacuum test gauge is specified for this vacuum measurement range.

800 psiMaximum working pressure

Specified 72-inch low-loss refrigerant hoses are rated to this maximum working pressure.

3-1/8 in.Gauge and boot size

This size is represented by manifold gauges and compatible protective gauge boots.

Comparison Guide

Compare Product Types

Use this overview to identify the product type that best fits the service task and compatibility requirements.

Product typeBest suited forKey selection considerations
Manifold and gauge setsCharging, diagnostics, evacuation, recovery, and adjustment tasksSystem application, number of hose connections, vacuum port, gauge scales, gauge accuracy, and manifold construction
Individual gaugesMonitoring low-side pressure or vacuum during compatible service workMeasurement range, dial size, connection type, mounting style, and gauge configuration
Hoses and replacement partsConnecting equipment and maintaining compatible service toolsHose length, hose diameter, fitting or valve style, refrigerant application, gauge size, and manifold or hose compatibility
Planning Guide

Plan the right fit before choosing

Select a Manifold or Gauge

Choose the reading and connection configuration your work requires

Manifolds provide a central connection point for service tasks, while individual gauges support specific pressure or vacuum measurements. For ammonia systems, an R717 manifold and gauge set provides pressure and temperature readings in bar/°C and psi/°F ammonia scales. For refrigerant diagnostics, evacuation, charging, and recovery, a four-hose manifold allows connections to high- and low-side lines, a refrigerant tank, and a recovery unit or vacuum pump without changing hoses.

  • Consider a four-hose setup when multiple service connections are needed at once.
  • Choose a 3/8-inch vacuum port when using a larger vacuum hose for evacuation work.
  • For critical charging systems, compare features such as class 1 gauge accuracy, full-port flow, and protected gauge faces.
  • Choose a 0–30 Hg liquid-filled vacuum gauge for the stated oil burner pump testing application.
Compare Hoses and Connections

Match hose length, fitting style, and refrigerant application

Refrigerant hoses are available in 60-inch and 72-inch lengths, with 1/4-inch hose options represented. Low-loss fittings help retain refrigerant in the hose after disconnection, while compact ball valve ends help manage flow in tight areas. Moisture barriers help resist moisture migration, and 45-degree ends can help with connections in confined service areas.

  • Choose a 72-inch hose when extended reach is needed between service equipment.
  • Consider low-loss fittings for CFC, HCFC, and HFC refrigerant work where retaining refrigerant in the disconnected hose is important.
  • Choose the 60-inch yellow hose with compact ball valve for the stated R-410A service application.
  • Verify the hose connection size and any working-pressure requirements before selecting.
Maintain and Protect Service Equipment

Keep compatible gauges, hoses, and manifolds ready for service

Replacement and protective components can help support regular service work. Rubber gauge boots fit 3-1/8-inch gauges and allow access to the recalibration screw without removing the boot. Replacement gaskets fit compatible 3/8-inch charging hoses, and a replacement feed screw is available for compatible Series 41 and Titan manifolds.

  • Match gauge boots to the specified 3-1/8-inch gauge size.
  • Choose red or blue boots to coordinate with the gauge color.
  • Use replacement gaskets only with compatible 3/8-inch charging hoses.
  • Confirm manifold compatibility before selecting a replacement feed screw.
FAQ

Common questions before buying

What is a four-hose HVAC manifold used for?

A four-hose manifold supports refrigerant diagnostics, evacuation, charging, and recovery by connecting high- and low-side lines, a refrigerant tank, and a recovery unit or vacuum pump without changing hoses.

What does a low-loss refrigerant hose fitting do?

A low-loss fitting traps refrigerant in the hose when disconnected to help limit refrigerant release and reduce the chance of finger burns.

How do I choose a protective gauge boot?

Match the boot to the gauge size. The represented boot set fits 3-1/8-inch gauges and provides access to the recalibration screw.

What should I check before buying a replacement manifold part?

Confirm compatibility with the manifold. The represented feed screw is for compatible Series 41 and Titan manifolds, while replacement gaskets fit compatible 3/8-inch charging hoses.

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