Then the ballcock in the thank keeps having to be replaced.
That would be very unusual. Ballcocks don't wear out that quickly!
Never really heated up stairs reds as good as down stairs reds. I av 12 radiators.3 are tiny and the rest are normal sized.
Did this stove replace another heating source? If so, did the previous source heat all rads effectively and evenly?
Was the system ever properly
balanced after the installation of the stove?
U can hear the water bubbling going up the pipes but then the over flow goes mad, the attic fills of steam n the water in the tiny tank is bubbling and over flowing n socking threw the bed room ceiling. There was no water in the tank the other night. Now the water that is in the tank is black dirty looking water.
Multiple problems there. You obviously have a lot of air in the system, have you tried
bleeding it? The tank in the attic should also have an overflow outlet so that it cannot overflow onto the ceiling. The black water means water from the heating system is being forced out as it heats/expands.
you have an '' system. That tank in the attic is the feed and expansion tank, it should never be empty, so you need to take a look at in inlet and check the ballcock can move freely and allows water enter from the mains. If water isn't flowing, then you need to check the feed, perhaps the water pressure isn't high enough to effectively feed the tank at that height.
Can any help or she'd light on what this could possible be. Will need to get it sorted
1. Sort out the tank in the attic, ensure that is being fed correctly, and has an outlet that will direct overflow outside
2. While cold, bleed the system at all rads (monitor the attic tank to ensure the air you belled is being replaced with water)
3. Balance the system fully as per the guide above
If all that fails, get a competent plumber out to look at it. There may be issues with the pump being under-spec'd or poor pipe layout resulting in airlocks. Modifying to a pressurised system may alleviate the latter issue.