Rate of Flow:
Quantity of pool water flowing past a designated point within a specified time.
Return Line:
That part of the pool, spa or hot tub piping between the filter and the vessel through which filtered water passes.
Ring Buoy:
Ring shaped floating buoy capable of supporting a user. Product suggestion: Foam Ring Buoy.
Rope and Float Line:
A line that connects at two ends of a pool and has buoys to separate either the deep and shallow ends, or create multiple lanes for lap swimming.