When is it permissible to use a bullseye water sight glass on a miniature boiler?

A bullseye water sight glass is a type of water level indicator that allows for visual inspection of the water level in a boiler. Its usage is particularly relevant in contexts where traditional gauges may not fit or function effectively.

In the case of miniature boilers, specific regulations and safety standards dictate the installation of water level indicators. A bullseye water sight glass is permitted when there is insufficient space to accommodate a conventional water gauge glass. This situation typically arises in smaller or more compact boiler designs where standard gauges would not be practical or feasible without compromising the integrity or accessibility of the system.

Using a bullseye sight glass in these scenarios provides an essential means of monitoring the water level safely and effectively, ensuring that operators can maintain adequate water levels to prevent operational issues like overheating or system failure. This option aligns with safety protocols while accommodating the physical limitations inherent in miniature boiler designs.