A water meter transmission system reads data from a water meter and wirelessly transmits data to a central billing or receiving system. Disclosed transmission systems are fully integrated and contained within pit housings such that electronic components are well protected. A spiral antenna is integrated into a specially configured integrated antenna cover which fits into the top cover of a pit housing. The antenna cover and/or upper lip area of the upper lip of the main housing may comprise a distal barrier and a medial barrier used to exclude water and contaminates. Disclosed transmission systems offer high output and low power consumption and vitiate the need for meter readers to physically access a water meter or other meters.