A
ashneedham
Hi all,
I believe I am in need of a new central heating pump. My system is a traditional open vent (I think that's the right term?). Living in a 2 up 2 down, we have an old boiler in the kitchen and the pump is in the airing cupboard upstairs. We have fitted a new rad downstairs and came to test it. the system fired up ok but we got no heat in downstairs rads only up. We drained the whole system whilst installing the new rad and bled the rads before starting again. From what I have researched it sounds as if the pump has gone.
The pump is a Grundfos 15-50 and probably been in over 20 years. I have been looking at screwfix and there is a Wilo that has good reviews and sounds like a good replacement. But it states that the Max Delivery Head is only 4m. Is the delivery head that total distance that the water needs to flow vertically?
My rooms are about 2.5m tall so from the highest pipe to the lowest is a out 3m. But I think that the pipes are setup so that the water returns back upstairs to the airing cupboard before going back to the boiler. Would that mean I have to get a max delivery head of about 6m? (Because effectively the water is flowing uphill twice, once from the boiler and again before returning to it).
I know people will suggest to get the best I can afford but at the moment I really can't afford much over £60 and I am reluctant to spend too much because I plan to replace the central heating next year and so the pump may not be needed.
Any advice or help is appriciated
Thanks
Ash
I believe I am in need of a new central heating pump. My system is a traditional open vent (I think that's the right term?). Living in a 2 up 2 down, we have an old boiler in the kitchen and the pump is in the airing cupboard upstairs. We have fitted a new rad downstairs and came to test it. the system fired up ok but we got no heat in downstairs rads only up. We drained the whole system whilst installing the new rad and bled the rads before starting again. From what I have researched it sounds as if the pump has gone.
The pump is a Grundfos 15-50 and probably been in over 20 years. I have been looking at screwfix and there is a Wilo that has good reviews and sounds like a good replacement. But it states that the Max Delivery Head is only 4m. Is the delivery head that total distance that the water needs to flow vertically?
My rooms are about 2.5m tall so from the highest pipe to the lowest is a out 3m. But I think that the pipes are setup so that the water returns back upstairs to the airing cupboard before going back to the boiler. Would that mean I have to get a max delivery head of about 6m? (Because effectively the water is flowing uphill twice, once from the boiler and again before returning to it).
I know people will suggest to get the best I can afford but at the moment I really can't afford much over £60 and I am reluctant to spend too much because I plan to replace the central heating next year and so the pump may not be needed.
Any advice or help is appriciated
Thanks
Ash