New shower installed, simple round ceiling head, with thermostatic mixer valve. Shower is on top floor of a 3-floor terraced house, where the water pressure has always been low. Combi boiler is being repaired (it's insured - a 15 year old Vaillant Turbomax) - fitter is coming soon for third time with yet another part as he misdiagnosed the problem. Hope that does the trick but I am still puzzled as to why the problem is particularly bad in the shower. Other outlets less so. Have just measured flow from kitchen tap (cold) fully open and it's only 6 l per minute. The kitchen is where the boiler is situated, on ground floor. What to do about shower?
