Continue shopping “ORIGINAL OEM Pentair Purex FNS SMBW 4000 Quad DE Filter Air Relief Valve 98209800” has been added to your cart. Product Price Quantity Total × ORIGINAL OEM Pentair Purex FNS SMBW 4000 Quad DE Filter Air Relief Valve 98209800 $23.01 ORIGINAL OEM Pentair Purex FNS SMBW 4000 Quad DE Filter Air Relief Valve 98209800 quantity $23.01 Cart totals Subtotal $23.01 Shipping Shipping costs will be calculated once you have provided your address. Total $23.01 Proceed to checkout — OR — Calculate shipping Country / region: Select a country / region… United States (US) State / County: City: Postcode / ZIP: Update