Air lock

[shipwreck]

Every time I turn the hot water tap on up comes a motor type vibration sound like a drill running,after I turn the tap off it keeps running for a while then stops.
I suspect it may be a air lock but I don't know how to get rid of an air lock.
Any help would be appreciated
Thanks

 

[kbdiy]

More detail required. How is your hot water supplied? Is it pumped? All hot water taps or just one?

 

[Burnerman]

Ball valve in the loft header tank vibrating, probably!
Needs a new washer or a complete replacement, which is probably easier.
John

 

[HERTS P&D]

As the main man has said 'new float valve '

http://www.screwfix.com/p/pegler-prestex-float-valve-part-2/27627

Andy

 

[shipwreck]

Many thanks for the replies,I know nothing re.Plumbing,living in a bungalow i know there's a big cold water tank and a smaller hot water tank that I never go near as plumbing and me are walking disasters.
I'll call in the Plumber now it seems not an airlock.
Thanks again for the help
shipwreck