hot water noise

[topper1970]

Hello,
When I turn on any hot water tap there is a loud rushing water sound that can be heard throughout the house. It lasts around 4 or 5 minutes after i turn the hot water off. It started 2 days ago. Any advice or information would be greatly appreciated. Thanks

 

[kevplumb]

system is (crystal ball is in for service)

 

[topper1970]

Hello,
Well, the system is a Baxi solo 3 boiler with a hot water tank upstairs. I hope this helps. Thanks again.

 

[kevplumb]

check the ballvalve in the header tank

 

[topper1970]

It looks like that is the problem. Big thanks for the help.