Hi Guys
Had to drain my Potterton Open Vent, Gravity fed system via the lowest radiator so I could replace a pump by my boiler downstairs. Refilled and bled rads. Every radiator is nice and hot, however the two pipes that go in the side of my NEW copper hot water tank in Airiing cupboard are both stone cold. So I'm guessing an air lock. How best to try and sort this problem, any help appreciated.
I've attached a diagram of my system (its from the 70s).
Had to drain my Potterton Open Vent, Gravity fed system via the lowest radiator so I could replace a pump by my boiler downstairs. Refilled and bled rads. Every radiator is nice and hot, however the two pipes that go in the side of my NEW copper hot water tank in Airiing cupboard are both stone cold. So I'm guessing an air lock. How best to try and sort this problem, any help appreciated.
I've attached a diagram of my system (its from the 70s).