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diamondgas
yes in hard water area, and water colour fine 🙂 and to be honest not spent gr8 deal our local plumb centre quite cheap considering had boiler for 8 years an only just decided have problem, did function very well prior,
TBH Sammi it makes a huge difference being present when diagnosing issues! From what you've said I'd be edging towards the pump. However I've found all-sorts of things that have restricted circulation in systems over the years! You can most likely get a replacement head for the pump which can save you a few bob if your wanting to try and fix this yourself? However it may not be the issue but will eliminate it from the equation yeh?