This TMC bilge pump is designed for confined or tight spaces and features an automatic operation with IC sensor design. Drains down as low as 10mm. Strainer can be rotated and cover can be removed for easy cleaning. Built-in reverse polarity protection. Built-in non return valve to prevent back flow. Top breath holes to prevent airlocks. Outlet port can be rotated for different installation purposes. Vertical or horizontal mounting. ISO-9001 and ISO-14001 certified.