Problem with hot water tap

[Harsh]

When running the hot water tap at half flow there is a continuos screeching type noise. The noise dissaperrs if the tap is then turned down slightly or fully opened.

I was told it was the washer, which i have chaned but the noise is still there.

Can anyone help

[bathmender]

Hiya,
It sounds like there is air in the pipework. If you've got piller taps, attach a short length of hose between the hot and cold taps, turn the cold tap on, then turn the hot tap on. Do this with care or the hose blows off of the taps. The theory is to dislodge the bubble and either push it back to its origin or displace it so it is expelled during normal tap use.
Also, check the temperature of the hot water. It should be approx 60 degrees C. Very hot water is prone to 'aerate' in the system. Also of course, if the temp is set low, check for leaks as the air got in there somehow!!

[Harsh]

Thank you for your reply. However, I should have mentioned in my question that it is a mixer tap. Can you advise how to cure an airlock if using this type of tap. Your advice is greatly appreciated.