Red Two-Speed Grundfos Super 4 replacement

31 Oct 2009
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United Kingdom
The C/H pump is beginning to sound like it's on its last legs. As the title says, it's a red two speed Grundfos Super 4 currently servicing a semi-detached property with eight radiators.

Details on the pump are:

No. UK7625
2500 r/min
Type 4.50/130
50 Hz
1 Phas
220-240 V
105 W
4.0 uF
0.48 A
Class F

If I'm looking to replace it, what am I looking for in terms of type, speed, etc? I see a number of pumps with 15-50 (or similar); how does this correspond with mine and what does it represent?

Any recommendations or suggestions?
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