Hayward Filter Head w/ Clamp System | DEX4820BTC Pool Cleaners Shut off pump circuit and

Shut off pump circuit and disconnect voltage supply before servicing

Remove the old valve assembly and inspect the filter flange for damage or residue

If the valve leaks in certain positions or cannot hold pressure

Clean the element periodically ("rinse and backwash" method) and replace it when rinsing no longer restores acceptable operating pressure

Hayward Filter Head w/ Clamp System | DEX4820BTC Pool Cleaners Shut off pump circuit andHayward DEX4820BTC Filter Head with Clamp System (Upper Tank Body) for Pro Grid DE4820 & SwimClear C4020 C4025 C4030 The Hayward DEX4820BTC is a complete OEM upper filter body (filter head) with clamp system used on select Hayward Pro Grid vertical grid D. E. filters and SwimClear cartridge filters. It replaces the entire top half assembly when the original head is cracked, warped, leaking at the clamp seam, or no longer seals reliably. Fits