Hello, i recently just changed some taps, i had turned off the mains supply drained the system down, fitted my taps then turned the mains back on, preesure is fine throught the cold taps all round the building, but the hot is very poor, the building has a hot water tank stored at high level (immersion powered) if this makes any difference, i have waited an hour for it to fill up and pressure/flow rate through the hot water is still poor....................can someone help me asap???
