Rectorseal 97637 - Safe-T-Switch SS2 Primary Drain / Secondary Drain Outlet Condensate Shutoff Switch Primary pan auxiliary outlet Smaller, L-Shaped switch installs on auxiliary pan outlets and requires no plug. Installs easily in tight spaces and catches clogs in primary pan outlet nipples. Pre-wired with 4-foot 18 AWG wires. The most reliable switch on the market Magnetic reed switch Easy to install, no need to be level Easy access to service Connect to either red or yellow wire Code compliant