Safe-T-Switch model SS1 can be installed horizontally or vertically, inline or on the primary pan's auxiliary drain outlet by using the included 3/4 inch adapter, bushing and cap. It can be installed on a sloping line and does not need to be level or plumb. Detects clogged A/C condensate drains and shuts off system to prevent water damage to floors, walls and ceilings, Can be installed horizontally, vertically, inline or on primary pan's auxiliary drain outlet using the included 3/4 inch adapter, bushing and cap.