Impasse with Housing Association.

SpikeyKitten

https://forums.moneysavingexpert.com/discussion/comment/81872465#Comment_81872465

True. But there's also the question of liability. If I fix it myself and something goes wrong and floods the flat downstairs for example.

anselld

In a low pressure hot system which it sounds like you have there can sometimes be a simple airlock in the pipe between kitchen and tank and there is insufficient flow to flush it through.

If you have a mixer tap in the kitchen a trick is to hold you hand very firmly to block the outlet and at the same time turn on both taps (hot first). This pushes cold water backwards through the hot side and can dislodge the airlock back into the tank. It will never be good with a gravity hot tank in a flat but it should be nearly as good in the kitchen as it is in the bathroom.
A better solution than a pump is to replace the hot tank with an unvented cylinder.

SpikeyKitten

https://forums.moneysavingexpert.com/discussion/comment/81872678#Comment_81872678

Thanks, I'll suggest the unvented cylinder to them. I don't think it's airlock related. I've tried all those things. I even gaffa-taped the hoover hose to the tap in the early days of the saga, attempting to 'suck' the air out of the pipe as recommended by an internet person 😂