Atlas Filtri PLUS HOT 3P 20" housings are a cost-effective alternative to stainless steel and carbon steel housings. They are designed to work with standard filter cartridges with an outer diameter of 2.5” (from 2.0” to 2.5” applicable). Standard versions are designed to accommodate double open-ended cartridges, version with a drain valve are designed to accommodate double O-ring cartridges.  O-ring OR-342-N is what is compatible with this housing.
The Atlas Filtri Senior Plus Hot Water Housing can withstand temperature up to 176°F (80°C) with a pressure rating at 125 psi (8.6 bar).