Apollo Valves 2070403 Water Level Gauge Fitting 1/2 Inch

Product Description

The APOLLO VALVES 2070403 is a 1/2-inch bronze water level gauge fitting designed for use with expansion tanks in hydronic and plumbing systems. Sold without glass or rod, this fitting provides the top and bottom connection points required to mount a 5/8-inch OD sight glass assembly. The bronze construction offers corrosion resistance suited to water service applications. Licensed plumbers and HVAC technicians install this fitting when servicing or retrofitting expansion tank gauge glass assemblies on closed-loop heating systems and pressure vessels.

This fitting is intended for expansion tank applications where a visual water level indicator is required. The top and bottom configuration allows the technician to establish a complete gauge glass run, connecting both ends of a 5/8-inch OD glass tube to provide a direct reading of tank water level. It is commonly used in residential and light commercial hydronic heating systems where expansion tank monitoring is part of routine maintenance and system verification.

Key Features

• 1/2-inch connection size fits standard expansion tank gauge ports
• Bronze construction provides corrosion resistance in water service
• Compatible with 5/8-inch OD sight glass tube
• Top and bottom fitting set supports a complete gauge glass installation
• Sold without glass and rod, allowing use with separately sourced sight glass components

Compatibility

Designed for use with expansion tanks requiring a 5/8-inch OD gauge glass and 1/2-inch top and bottom fitting connections. Specific tank model compatibility should be verified against the expansion tank manufacturer specifications before installation.

Installation Notes

A licensed plumber or qualified HVAC technician should perform this installation in accordance with applicable local plumbing codes and IPC guidelines. Shut off system pressure and drain the tank or isolate the gauge port before removing or installing gauge fittings. Do not overtighten bronze fittings against glass tube ends, as this can crack the sight glass. Verify that the 5/8-inch OD glass tube is sourced and cut to the correct length before completing the assembly.

Technical Specifications

• Connection Size: 1/2 inch
• Material: Bronze
• Glass Tube OD Compatibility: 5/8 inch
• Fitting Configuration: Top and bottom set
• Glass and Rod Included: No
• Application: Expansion tanks

Standard Information

• Brand: APOLLO VALVES
• Manufacturer Part Number: 2070403