Reliance RK-5B Size 6 Flat Glass Gauge Repair Kit

Reliance RK-5B Size 6 Flat Glass Gauge Repair Kit is a dedicated replacement set for flat glass gauge windows on FG1500-series water gages, with the Size 6 designation referring to the glass size and the kit intended for use on a single window in each FG1500 gauge assembly. As noted in Clark-Reliance OEM parts documentation, the RK-5B SET is the repair package used to service Size 6 flat glass in FG1500 gauges, aligning with the company's flat glass water gage offerings and their approach to maintaining boiler water level indicators. The kit is described as a repair kit for the flat glass component within FG1500-series water gages, reinforcing the link between gauge maintenance and reliable water level indication. Some listings describe the RK-5B as arriving in a sealed box, reflecting its packaged form as a complete repair set for a single gauge window.