Sog Vent Type 3000A Suit Dometic CT3000/CT4000 Black Door Vent Cover Window Parts The sender probe only requires

The sender probe only requires one 22mm (7/8") hole in the side of the tank

so you don’t get cold

Soft fabric lining

The sender probe is sealed with a special grommet which is compressed in the hole when the nut is tightened and measures the water level by contact with the 5 sensors along the arm

Sog Vent Type 3000A Suit Dometic CT3000/CT4000 Black Door Vent Cover Window Parts The sender probe only requiresThe SOG Toilet Ventilation System is an ecological solution for motorhome and caravan toilets. It is 100% chemical free and 100% odorless. This system is available for all popular 12V Thetford and Dometic cassette toilets, as well as for permanent black water tanks. Choose from standard side, roof or floor venting models, all designed to match your existing cassette toilet. Made with the traditional German engineering and know how, this solution to a