Multi-controlled water conservation system for hot water lines with low pressure utilization disable

An improved water conservation system for use in a dwelling or other building having a pressurized main water supply, a hot water heater, a recirculating cooled hot water supply line, said hot water heater having a cold water inlet side and a hot water outlet side, said inlet side being primarily connected to said main water supply through a first check valve and secondarily connected to said recirculating cooled hot water supply line by means of a tee connection located upstream of said inlet side and downstream of said first check valve, said hot water outlet side being connected to a plurality of hot water lines which feed hot water outlet faucets at wash basins, sinks or the like, comprising:

• a second check valve, said second check valve being located in said recirculating cooled hot water supply line upstream of said tee connection;
• an electrically controlled recirculating centrifugal pump in said recirculating cooled hot water line, said pump being located upstream of said second check valve, said pump also being capable of producing water pressure which is sufficient to open said second check valve and close said first check valve when said pump is electrically energized;
• a hot water faucet tee connection, said hot water faucet tee connection being located in close proximity to said hot water outlet faucets at said wash basins, said hot water faucet tee connection couples said hot water lines feeding said hot water faucets and said recirculating cooled hot water supply line;
• an in-line temperature gauge in said recirculating cooled hot water supply line, said in-line temperature gauge having a visual numerical temperature value readout and being located in close proximity to said hot water faucet tee connection to better sense the temperature of the water at said hot water outlet faucets;
• a manually-operated electrical on/off switch connected to an electrical source for controlling discretionary utilization of said water conservation system, said electrical on/off switch being conveniently located at each location of said hot water outlet faucets near said in-line temperature gauge whereby said electrical on/off switch can be manually operated at user's discretion to energize said recirculating centrifugal pump to recirculate the cooled hot water until said in-line temperature gauge readout indicates that the temperature of the hot water at said hot water faucets has reached a desired temperature;
• a pressure switch located upstream and in close proximity of said hot water heater outlet side, said pressure switch sensing the water pressure of the system and being electrically wired in series with said electrical on/off switch for preventing the electrical energizing of said recirculating centrifugal pump by said manual-operated electrical on/off switch if the water pressure from said main water supply has fallen below a predetermined low pressure and allowing the energizing of said recirculating centrifugal pump if the water pressure is above said predetermined low pressure;
• a timer clock switch electrically wired in parallel with said electrical on/off switch and similarly wired to said electrical source and also wired in series with said pressure switch so that said timer clock switch will energize said recirculating centrifugal pump only if the water pressure from said main water supply is above said predetermined low pressure and will not energize said centrifugal pump if the water pressure from said main water supply is below said predetermined low pressure;
• and
• a thermostat control switch suitably installed in said recirculating cooled hot water supply line, electrically connected to said electrical source and wired in parallel with said electrical on/off switch and said timer clock switch and in series electrical connection with said pressure switch such that said thermostat control switch will automatically energize said recirculating electrical on/off switch at a preset thermostat temperature provided that said pressure switch senses that the water pressure from said main water supply is above said predetermined low pressure and will not energize said recirculating centrifugal pump if said pressure switch senses that the pressure from said main water supply is below said predetermined low pressure.