Hi, i have a small radiator in the bathroom that i want to drain and remove. I have turned the maual control valve off and turned the lockshield valve to off which took 3 turns , however after aprox 4/5 pints it is still coming out . The radiator is 24inchx19inch. Also when the system is on hot water only the radiator in the bathroom also gets warm . The water that is draining apears to be lukewarm and not cold . Could anyone please help as what the problem could be . I do not need to remove the radiator but if i do the end job would look so much better . Thanks