As above, I have a Grunfos UPS2 15 50/60 and it’s probably about 6 or 7 years old. Just wondering whether it’s worth buying one now to have handy in case it ever packs up. It does seem to get hot quickly - before the water temperature gets that hot. No noises or anything. Worth changing or just buying one in case it dies? What’s the average life of these things?
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