Review on Rectorseal 97637 Safe T Switch Ss2 by German Diaz

Depending on where your secondary exhaust valve is located, like me, you may need to purchase 3/4 inch fittings for the installation. If you're lucky, you can mount it directly to the block with no additional parts. It took a while to figure out the electrical connection, but all you have to do is find the red thermostat wires going in and out of your HVAC unit and connect a black wire to a red wire , which leads to your home's thermostat. and the other to the secondary red wire. I watched the installation video on YouTube and called Rectorseal's engineering department and everything was set.