This 1" FBT x 3/4" Barb Pump Union comes complete with matching O-ring for reliable sealing. Designed to connect 3/4" Inside Diameter hose (measuring approximately 1" on the outside) to a 1" threaded pump wetend. The threaded side measures approximately 1 7/8" outside to outside. The barbed end accepts 3/4" hose, while the threaded end screws directly onto 1" wetend fittings. Commonly used with Waterway Tiny Might pumps for both suction and pressure side applications.

Important sizing note: SpaShopper carries multiple pump union configurations including 1 1/2" Slip x 1 1/2" Pump Wetend, 2" Slip x 2" Pump Wetend, and 2" Slip x 2 1/2" Pump Wetend sizes. This specific union is correct if your plumbing hose measures 3/4" Inside Diameter and your pump wetend threading is 1" (measuring 1 7/8" across the threads). Verify your measurements carefully to ensure proper fit with your spa circulation system.