Question
Do recirculating systems that do not use a pump work very well?
I saw a Nibco recirculating system at a store; it says that it works via convection, and needs a return line. Anyone know if these work as advertised? I am working on finishing my lower level off, and so have the ability to put a return line in place. Kitchen is about 40 feet from the hot water heater.
Answer
The idea sounds great but the result is poor. A small pump with a 24-hour timer set for 30 minutes on, 30 minutes off is efficient and works great. Be sure to insulate all of your hot water pipes. Use PEX if possible.
