The housing has three ports in the body, one for your fan switch, a 1/8 NPT port for gauges etc. and also NPT port for our optional recirculation fitting. 2 NPT plugs are included in case the ports remain unused.
Threaded Water Outlet for Custom Setups
The kit uses a standard size thermostat that you can easily replace with anything in the (160-195 °F) degree range.