New thermostat housing now available. This is designed to be bolted directly to water pump. You have two ports on the top to run recirculation and optional heater line. We have a blind port for fan switch (it's threaded but not fully drilled so no plug is needed). All ports are behind the thermostat and will have flow when thermostat is closed. MSRP $229.99. We are still offering the original design as well. Click on the product for more info