Hi all,
Im planning on fitting a some new radiators and TRV’s in the place I recently moved to and I need a bit of advice regarding draining down and refilling the system since ive only ever drained/refilled combi systems in the past and this one is new(to me)
Regarding the system itself….… ive done a bit of research and I think the system is an open vented gravity fed system with separate CH and HW controls.
Heres a couple of pics that someone might be able to look at and confirm for me.
In the loft ive got one large tank with the inlet ball valve marked in as Tank A in my pic
This is connected to a further two tanks of the same size via a link pipe at the bottom( tanks B and C)..…
I think these serve as the supply for the hot water cylinder…..
Then ive got the small feed tank for the CH at the forefront of the pic
From what I understand, if I want to drain down the CH system to carry out the intended work I need to do the following:
-make sure CH is switched off
-tie up the ball valve in the small feed tank or isolate the supply if possible
-open the drain cock (with hose attached) then drain down the system venting each rad from upstairs to down as the system empties.
-Do i need to do anything with the large tanks?
-Is there anything else i might have missed?
I’ll probably have to spread the task of fitting the new rads and valves over a couple of weekends but i wasn't sure if the HW/CW system will be affected by the drain down.
Would this be okay and will i still be able to safely use the hot water system whilst the CH is temporarily drained for a couple of weeks?
Any advice appreciated.
Cheers
Rob
Im planning on fitting a some new radiators and TRV’s in the place I recently moved to and I need a bit of advice regarding draining down and refilling the system since ive only ever drained/refilled combi systems in the past and this one is new(to me)
Regarding the system itself….… ive done a bit of research and I think the system is an open vented gravity fed system with separate CH and HW controls.
Heres a couple of pics that someone might be able to look at and confirm for me.
In the loft ive got one large tank with the inlet ball valve marked in as Tank A in my pic
This is connected to a further two tanks of the same size via a link pipe at the bottom( tanks B and C)..…
I think these serve as the supply for the hot water cylinder…..
Then ive got the small feed tank for the CH at the forefront of the pic
From what I understand, if I want to drain down the CH system to carry out the intended work I need to do the following:
-make sure CH is switched off
-tie up the ball valve in the small feed tank or isolate the supply if possible
-open the drain cock (with hose attached) then drain down the system venting each rad from upstairs to down as the system empties.
-Do i need to do anything with the large tanks?
-Is there anything else i might have missed?
I’ll probably have to spread the task of fitting the new rads and valves over a couple of weekends but i wasn't sure if the HW/CW system will be affected by the drain down.
Would this be okay and will i still be able to safely use the hot water system whilst the CH is temporarily drained for a couple of weeks?
Any advice appreciated.
Cheers
Rob