Hi,
I have an old back boiler, which is working ok, but every couple of years, the hot water loop gets air in it and the hot water slowly stops getting hot.
Because of the original poor fitting of the heating system any bubbles have to work their way up, through the overflow pipe into the tank.
I have a car oil removal pump, that I use for pulling out the bubbles, which I did yesterday. I don't know where the air is getting in.
When I took the top off the tank, there was a thick film of jelly like gunk, that I scraped off, I presume it's inhibitor. Here's a photo:
What is the film?
Cheers, Camerart.
I have an old back boiler, which is working ok, but every couple of years, the hot water loop gets air in it and the hot water slowly stops getting hot.
Because of the original poor fitting of the heating system any bubbles have to work their way up, through the overflow pipe into the tank.
I have a car oil removal pump, that I use for pulling out the bubbles, which I did yesterday. I don't know where the air is getting in.
When I took the top off the tank, there was a thick film of jelly like gunk, that I scraped off, I presume it's inhibitor. Here's a photo:
What is the film?
Cheers, Camerart.