I am selling my ATO after I tore down my nano, it is the same type as advast marine , (pressure switch). I have used this for 5 years and never had a tank failure (I replaced the tubing with industrial tygon), $40 shipped
BlueLine Products - Reef Aquarium Lighting & Pumps
Untitled by jbolton1019, on Flickr
BlueLine Products - Reef Aquarium Lighting & Pumps
Untitled by jbolton1019, on Flickr

