We live in a flat and, having just replaced the kitchen sink and taps, find that what was already a low flowrate at the hot water tap has been made somewhat worse, a litre of water now taking about 20 seconds to deliver. The problem originates with the limited head of water (about 2 metres) and is exacerbated by the small-bore tap connectors (which replace the previous direct 15mm connection. Cold water is at mains pressure, which is good (about 5 seconds to deliver a litre at the kitchen sink). Is it viable to pump the hot water to the kitchen sink? Cold water feed to the header tank delivers a litre in as little as a couple of seconds so there's little risk of running the (approx 250 litre) tank dry.
TIA