Hot water problem

[mike pollard]

Hi Folks,
I fitted a new valve to the loft cistern, replaced the guts of two toilet cisterns.
Didn't touch the hot water system, but now it will not run properly (comes and goes in spurts). Tried clearing what appeared to be an air lock via the washing machine hoses but no joy. Whole system is old (galvo tank, lead wastes etc) Standard immersion cylinder. Blockage perhaps? Any ideas gratefully received.
Mike.

 

[newbie1]

airlock..trial and error now to get rid off

 

[pipebender]

If you have changed nothing but a valve on the system, I agree with the airlock theory.

As you have tried pushing it back through the mains I would turn the boiler stat up and try to boil it out via the hotwater system.

Dont forget to turn the stat down after though !

 

[david williams]

hope you charged enough to cover your time getting rid of airlock

 

[justlead1]

Hi If the cylinder cold feed is galv you may well have moved some scale creating a blockage? Which its another story. Have you tried a short piece of hose, held against ball valve outlet and the other end down cold feed to cylinder with the hot bath tap open, if water flows from the vent stick your thumb over it for 30 seconds. Check results. Good Luck

 

[johnny j]

could be dirt. happened in my own house just last week. guys were putting insulation in the roofspace and new tank jacket and lids. basically i ended up with insulation blocking my toilet and basin. had to blow it out wit the mains

 

[mike pollard]

Many thanks for the suggestions guys. Still remains a mystery as to the cause, but I got a call a couple of days after and the problem had cured itself.
There is a god!
Mike