Household Flow Rates Appliance/Use Flow rate GPM (US) L/min Lavatory Faucet 1.0 3.8 Bath Tub 4.0 – 10.0 15.2 - 37.8 Shower 2.0 7.5 Kitchen Sink 1.5 5.6 Dishwasher 1.5 5.6 Washing machine Taken from UPC 2006 4.0 15.2 Unit: GPM (L/min) Model Flow rate 140 (T-H3M) Indoor Outdoor ...