Fully pumped systems circulate heated water around hot water and heating circuits using a pump. This allows for better control through a cylinder thermostat, room thermostat, and programmer. Heat-up times are quicker, making the system more economical. Older pumped central heating systems do not include hot water but serve heat emitters around the property using a timer, boiler thermostat, and possibly room thermostat. A fully pumped mid-position valve Y plan system uses a three-port valve to control flow to the hot water cylinder and heating circuit. A fully pumped two, two-port valve S plan system uses separate zone valves to control hot water and heating circuits independently.