Filter Results
Sight Diameter
Connection Pipe Size
Body Material
Sight Material
Hex Size
Max Operating Pressure
Overall Length
Max Operating Temp
Liquid Level Sight Plugs

Liquid Level Sight Plugs

Install these sight plugs to observe the presence and levels of liquid in a gearbox or other type of reservoir, or use them as a sight window to monitor relays or switches in housings, ensure that gears are in motion, and check burner flames. They allow viewing of the contents without having to open the container.

Low Pressure

Low Pressure

Use these sight plugs in low-pressure applications, such as in gearboxes and reservoirs. They feature a stainless steel reflector for easy viewing of dark-colored liquids.

Brass Body

Glass Sight

High Pressure

High Pressure

These heavy duty sight plugs have a one-piece, fused construction that increases their strength and allows them to withstand high-pressure environments, such as in boilers and other steam devices.

Carbon Steel Body

Fused Glass Sight