Replacing Central Heating pump (Grundfos 15-50x18)

diesel_doglet

Hi All,

Any help with this one will be much appreciated.

My CH pump has given up - its a Grundfos 15-50x18 which appears to no longer be available for sale.

I have been told I can replace the entire pump with another 15-50 of any manufacturer however the issue I have is that the two nutts are seized and its in a very difficult position to remove the entire pump.

I can however get to the 4 alan nuts on the front relatively easily so I am thinking of replacing the head only however I am having trouble getting confirmation of what head will fit.

Does anyone know with any clarity if a Grundfos 15-50 130 head will fit?

Any advice greatly appreciated.

Thanks
DD

jk0

Have you looked at the Grundfos Product Selector?


https://uk.grundfos.com/products/find-product.html

diesel_doglet

Hi,

Thanks I have just checked that out, but unfortunately it does not tell me if the modern heads is compatible or not.

Hopefully someone in the know may be able to help me!

Thanks
DD

nofoollikeold

Consider:
1. Cutting the pipes to the old pump, then extending one or both pipes to fit the new pump.
2. Try using one of these - Screwfix 6676K.
3. Remember that the valves each side of the pump:
3a. Tend to leak if they are the screwdriver slot type.
3b. Rarely close completely if they are the gate valve type.
4. Well worth replacing the pump valves at the same time as the pump. If doing so, suggest Pegler ones.