Model: Telford Tempest Stainless Type: Unvented mains-pressure domestic hot water cylinder Capacity: 300 litres Operating pressure: 3 bar Expansion vessel charge pressure (manufacturer spec): 3 bar Expansion relief valve: 5 bar T&P relief valve: 7 bar / 90°C

Normal hot water temperature: 55–62°C

Cold supply is from Well Water Pump, but the cylinder is regulated via a PRV to 3 bar, so the cylinder operates as a 3 bar system.