Fleck 3900 3" Valve (3" Side Mount w/3" Meter) - FL39/18M-3SM-0.
Designed for single or multi-tank installations. Continuous flow rates up to 210 gpm, peak flow rates up
to 271 gpm. Backwash rates up to 90 gpm. Use on softener tanks up to 60" diameter, filters up to 42".