Low pressure once got water arrives at outlet

[Bogart]

Problem is with a directly heated invented cylinder. Turning on a hot water tap alone, does not matter which,there is an excellent flow rate until actual hot water arrives at the tap. Then the pressure drops of considerably. Am I missing something obvious with this setup?

 

[Riley]

I am assuming you are not G3 qualified so you will need someone to investigate for you

 

[Millsy 82]

Is this only 1 tap or all of your hot taps.

 

[Aire]

What sort of tap Is it? Has the problem always been there or is it something new? How does your cold water flow rate compare to the hot water?

 

[Chuck]

Problem is with a directly heated invented cylinder.

Fairly common problem with a couple of possible causes. Not fixable by the end user. You need a G3 (unvented) qualified engineer to attend and service the system.

Has the system been serviced annually by a qualified person? These systems do need periodic maintenance/checking by a competent person.

 

[Bogart]

Is this only 1 tap or all of your hot taps.

All outlets shower included.

 

[Bogart]

What sort of tap Is it? Has the problem always been there or is it something new? How does your cold water flow rate compare to the hot water?

Cold is fine at anytime. Hot is same until actual hot water arrives at tap, i.e. cold water in that bit of pipework got rid of after opening tap.

 

[Bogart]

Fairly common problem with a couple of possible causes. Not fixable by the end user. You need a G3 (unvented) qualified engineer to attend and service the system.
Daughter's a place Has not been in long doubt been looked at in years.

Has the system been serviced annually by a qualified person? These systems do need periodic maintenance/checking by a competent person.

 

[Bogart]

Fairly common problem with a couple of possible causes. Not fixable by the end user. You need a G3 (unvented) qualified engineer to attend and service

Has the system been serviced annually by a qualified person? These systems do need periodic maintenance/checking by a competent person.

Doubt it has been looked at in years.

 

[Aire]

By what you've said the fault definitely lies with the cylinder/component. As mentioned above, get a g3 qualified engineer in to look at your system.