Well pump sizing

Head = water table depth + 1 m per 10 m horizontal + tap pressure (1 bar = 10 m) + 20% reserve. Flow: one tap ~10 L/min, three taps ~1.8 m³/h. Don't oversize a pump 2× — it will short-cycle and kill the accumulator. Accumulator: 24 L up to ~2 m³/h, 50 L up to ~4; a bigger tank = fewer starts = longer pump life.