Hello, I need help with defining pressure in closed district heating system. As shown in attached drawing, we have a heating station which supplies hot water (110/70 degrees C) to various households. The lowest house is 90m below station and the highest one is 20m above. I need to determine final pressure in system and release pressure of safety valve. I assume final pressure in system would be 11bar (90m+20m) and release pressure of safety valve 12bar (10% above system pressure)?