This item has been discontinued
The Pentek HEP-1-3.1-20 has been discontinued. There is no direct replacement filter. You can use the Pentek CEF1-20BPVXDVP filter for similar contaminant reduction. The Pentek CEF1-20BPVXDVP filter does not have the 3G Seal-Safe style top but you can still use them in the 3G Seal-Safe style water filter housings.