Continue shopping “ORIGINAL OEM Pentair Purex FNS SMBW 4000 Quad DE Filter Air Relief Valve 98209803” has been added to your cart. Product Price Quantity Total × ORIGINAL OEM Pentair Purex FNS SMBW 4000 Quad DE Filter Air Relief Valve 98209803 $21.95 ORIGINAL OEM Pentair Purex FNS SMBW 4000 Quad DE Filter Air Relief Valve 98209803 quantity $21.95 Cart totals Subtotal $21.95 Shipping Shipping costs will be calculated once you have provided your address. Total $21.95 Proceed to checkout — OR — Calculate shipping Country / region: Select a country / region… United States (US) State / County: City: Postcode / ZIP: Update