hot water pressure

[bcafg1]

A mate of mine lives in a downstairs flat with a back boiler, a copper cylinder and one tank which is f&e size.
All of a sudden the pressure on his hot water tap has become a trickle.
Could this problem be caused by an airlock? The system has not been interfered with for about 6 months.
The other assumption is the cylinder is primatic due to only one tank.
Is it possible, if it is the airlock, to remove the airlock has you would with an indirect cylinder. Thanks for any help in advance.

 

[Diyisfun]

Could be the washer has stuck on the tap.
If its on all the taps then forget with above.

 

[bcafg1]

its not the washer has is on both taps. Anyone with any advice please regarding clearing what i think is an airlock

 

[Bahco]

Read the FAQs.

 

[bcafg1]

No 23 bahco. ive read this already do you follow the same procedure with a primatic cylinder.