Water meters suitable for domestic applications. Shown here is the secondary water meter which is used for non billing purposes and is ideal for apartments. If the water meter is fitted vertically it is specified as Class A, when horizontally it is Class B.Specification: Cold water meter: water temp. range -10 degrees to +50 degrees C. Maximum flow rates: 1/2" - 3 cubic metres/hour. For prices and other models click here .