to drain or not to drain,that my friends is the question

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Hello everybody,
I have just fitted a new Stanley Brandon 100k oil fired cooker and
need to change the old moterised valves, i have a sealed system
and do not know how to drain and refill if i have to or if there is a simple
way around this, :?:
 
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Then how did you fit it to the system.?
hi gasman.
thanks for your interest,i should have said a plumber fitted the
new one , i have to replace old valves because they only have
two wires and the new ones have five so i can heat water
without heating rads.hope this makes sense to you.
 
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I think Ben is more asking a question of why the valves weren't replaced when the cooker was installed, as presumably it would have been drained down for this.
 
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I think Ben is more asking a question of why the valves weren't replaced when the cooker was installed, as presumably it would have been drained down for this.
i did not know i needed new valves and nobody told me until the guy came to commision it,when i called the plumber he said it cant be done
but i think he just will not admit he missed it .
 
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In answer to your question sealed system just screw down caps on any auto air vents. release the pressure and it should vacum up quite quickly usually after a few pints of water has come out then change on valve at a time
 
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In answer to your question sealed system just screw down caps on any auto air vents. release the pressure and it should vacum up quite quickly usually after a few pints of water has come out then change on valve at a time
thanks namsag wll do this appricate the help.
 
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