Figures 1 - 2:
1 - THE, 2 - Hot water outlet pipe, 3 - Cold water inlet pipe, 4 - Drain valve, 5 - Relief
valve, 6 - Drainage in the sewers, 7
– Supply line, 8 - Shut off valve during EWH operation,
9 - Cold water main pipe, 10 - Hot water main pipe, 11 - Cut-
off valve, 12 - Protective
cover.