For easy and quick setting of operating flow rates to manufacturers specification prior to installation of washing m/cs, boilers, showers etc; for checking if combi boiler or water heater needs de-scaling. Dual scale 2 to 25 litres, 1 to 5 gallons. Sturdy durable plastic design. Long life stainless steel mesh strainer avoids turbulence. Litres 2-25 Gallons 1-5 Display Pack.
