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Thanks for the suggestions.
One thing I am still not clear about: my existing Grundfos Selectric UPS 15-50 is a DN15 pump, and my...
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Thank you for the helpful replies. I would appreciate any further suggestions for suitable replacements, especially modern, efficient...
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Hi,
I have an open-vented central heating system with a Grundfos Selectric UPS 15-50 circulation pump (photo attached).
The electrical...
