Dry Top Multi-jet Design simple, accurate, wide flow range, tolerates low quality water Hinged Lens Cover protects display and register Union End Couplings for easy service Corrosion Resistant All parts in contact with water are constructed of corrosion-resistant materials Extra filter at the inlet of the meter body permits cleaning without having to open the meter 3/4" Plastic Water meter with pulse output (1 pulse per 1 gallon), includes NPT union couplings and gaskets. This uses time-proven multi-jet technology that delivers +/- 1.5% accuracy when operating within the normal flow rate range. It features a 'leak indicator' dial that can be seen spinning at well below the minimum flow rate.