If the pressure inside a iron pipe is too high and the upvc pipe itself has cracks it may end up in a leakage.

We offer to solve difficulties with low pressure and high pressure in the pipes in less than 20 minutes. If you are not happy about the low pressure of the water in your washbasin or shower, a experienced plumbing technician can easily mend it. If the pressure inside the pipes is too low the water’s stream may be too weak to use it. The boiler may not be functioning as a consequence of low pressure, as a consequence, it is acceptable to think that it is a sign of something more serious like a leak in the system.

Water may not be running because of low pressure in the pipes which can be safely solved by a plumber

To alter the stream of the water just you should to turn the knob to replace the pressure inside the hose. Weak flow of water may be caused by low pressure inside the pipes which can only be fixed by a licensed skilled plumbing expert