The Pentek 153013 is the correct replacement sump for the following water filter housings:
The Pentek 153013 20" Blue Filter Housing Sump is a replacement filter housing sump with a blue finish that fits #20 Standard Housings. This 20" blue housing sump is constructed out of durable polypropylene, which makes it stronger and more reliable in order to be longer lasting. Also known by part number 153013, this #20 water filter housing is a genuine Pentek part and does not include an O-ring.
Pentek 153013 20" Blue Filter Housing Sump specifications: