Compare Quick view Hayward HAYWARD | AIR RELIEF ASSY W/4811-22 | DEX2420AR MSRP: Was: Now: $134.62 HAYWARD | AIR RELIEF ASSY W/4811-22 | DEX2420AR Part for PLASTIC FILTER MODELS : DE2420 | 3620 | 4820 | 7220 Add to Cart Add to Cart