The 50PNI2 is a light and compact automatic pump with an energy efficient motor and integral anti-airlock valves. It feature a dual control float-switch which enables manual and automatic operation. This switch is also adjustable to enable individual setting of on and off levels. The float is bell shaped and small, which make these pumps suited to applications where a sump is narrow, that require precise level control or where a traditional pendant type float’s operation could be fouled. Liquid paraffin is used for the lubrication oil, which enables use in food processing and aquaculture. They are not recommended for ponds or water features.