How do you empty the water in the house system?

Question

This is to install new radiators.

Answer 1

When draining the water from the house lines the first step is to make sure the main water valve is closed preventing any more water from entering the house. Then make sure that the gas and electric are off to boiler and  or heater. After the water, gas, and electric are off you need to open the valve on the boiler and or heater and let it drain. If a floor drain is not nearby attach a hose and direct the water to a sink or drain. Walk around the house and open up every faucet and flush every toilet. This will drain the existing water from the lines. Finally open up the valve on all low radiators.

Answer 2

Hi, as above and then locate your lowest radiator you should find a drain c**k attach a hose pipe and undo your air vents on the rads and then the water will flow out, remember to start upstairs with the vents as the water will gradually come out.

Answer 3

first you shut off power to the boiler,then shut off water supply valve,then drain water at drain valve at lowest level of your boiler