How do you close a Hayward pool filter?
How do you close a Hayward pool filter? How to winterize a Hayward sand filter during the pool closingCompletely drain tank by unscrewing drain cap at base of filter tank. Leave cap off during winter.Depress Vari-Flo control valve handle and rotate so as to set pointer on valve top between any two positions. This will allow water to drain from the valve.