particular kind of rlf supply and return branches within the faucet may have different extents the restriction 112 provides a pressure difference across the diverter and thus across the recirculating flowpath 120 as noted above the system 100 may have one or more advantages relative to the system 20 and or the system 20 u2032 for example relative to the system 20 the system 100 may be implemented to provide reduced opportunity for contaminant growth alternatively or additionally the system 100 may provide simplification and cost reduction of the main distribution line relative to the system 20 for example the main distribution line of the system 100 may be relatively straight and compact compared to that of the system 20 whereas the main distribution line of the system 20 may be circuitously routed to proximate the base of each faucet e g extending up into cabinets benches or other stations to reduce dead leg length the main distribution line in the system 100 may be further away from its associated faucets e g remaining entirely in floor in wall or otherwise being compact and non circuitous relative to the system 20 u2032 the system 100 may essentially cut the required length of main distribution line in half by eliminating the distinction between supply and return legs this also may essentially halve the associated plumbing labor involved in bringing both the supply and return to desired location relative to each faucet the restriction 112 is sufficient so that the pressure differential allows sufficient recirculating flow.