Grndfos pump numbers

[gassman]

I have a UPS 15-50 x18 pump. Can anyone tell me what the x 18 stands for?

 

[quality]

18mm pump bore

 

[heliotrope]

The 18 is probably the length in cm. though usually expressed as 180 (mm)

Check that the number is 180, it's not usually written as 18.

You can get 15-50 130 and 180 pumps.

 

[missplumb]

as above, its the length of the pump flat face to face.most domestic pumps are 130 or 180mm

 

[gassman]

It is 15-50x18 its a grey grunfos and used on Gledhill appliances.
I have 2 brand new ones on my shelf and wondered about using on a different system. the x18 is the puzzling part. Not sure if they can be used elsewhere?

 

[gassman]

Can this pump run a standard 3 bedroom house heating/hot water system?

 

[gassman]

The flat face measurement is 130mm on this pump so x18 is puzzling