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I'm just planning the replacement of the entire hot & cold system in a 5 floor property with 3 bathrooms, 1 cloakroom, kitchen, utility room & laundry room. Would welcome some advice on the design specification: 1) All 3 bathrooms are currently directly fed off the rising main. Pressure at...

I have an indirect, vented heating system. The circulation pump needs replacing (about 10 yrs old and bearings are noisy). The existing pump has obviously been working fine for years. It is a Grundfos 15/50. My inclination is to fit the exact same one. Question: I see from the...