Yes, the DROP Whole House Backwashing Filter has been designed to fit a 1″ service line. The filter comes in two models: F-15 and F-25. The F-15 model has a continuous service flow of 5.0 gpm (gallons per minute) and an intermittent service flow of 7.0 gpm. Similarly, the F-25 model has a continuous service flow of 8.0 gpm and an intermittent service flow of 10.0 gpm. However, the use of a Flow Control in the service line is highly recommended, and sizing should be done carefully, prioritizing the backwash flow requirement first. Please call or chat with any questions you might have.