Pool Info: Gate Valves
Gate valves are very similar to a faucet style knob in your bathroom or the garden hose spigot outside. These type of valves are not a common pool valve on new installations, but were the only valve used on pools over thirty years ago.
These valves are commonly found to be leaking air and or water. You can repack the valve using plumber's tape, if the valve is leaking air or water from under the nut. These valves may be easier to replace with something of a plastic variety if they leak or if the handle just spins and spins....