Compound water meter is a kind of measuring instrument which is widely used at present, its measuring range is wide, which is the outstanding characteristic of this kind of water meter. What we call a child water meter should be called a compound water meter or a combined water meter. This is a new type of water meter which combines large caliber water meter and small caliber water meter. In fact, However, with the demands of water departments for the recovery or sale of water charges, all domestic water meter manufacturers have carried out new development and transformation of this type of water meter. the multi jet water meters and woltman water meter are combined into one water meter, which is mainly composed of a flow control valve installed on the back of a horizontal woltman type large diameter water meter and by-pass connecting a small diameter rotary vane wheel meter or called multi jet water meter.
