To alter the stream of the water just you should turn the knob to replace the pressure inside the hose.

Water may not be running because of low pressure in the pipes which can be safely solved by a qualified plumbing engineer If you are not happy about the low pressure of the water in your handbasin or shower, a expert in plumbing can easily repair it. If the pressure inside the pipes is too low the water’s stream may be too weak to use it. Insufficient evacuation of water may be caused by low pressure inside the pipes which can only be fixed by a licensed certified plumbing specialist

The boiler may not be functional down to low pressure, thus it is probable that it is a mark of something more serious like a leak in the system.

We offer to solve complications with low pressure and high pressure in the pipes in less than 20 minutes. If the pressure inside a plastic tube is too high and the iron pipe itself has cracks it may end up in a leakage.