Unused 576 gpm vertical filter manufactured by Houston Process & Design. 29" diameter x 112" height. Carbon steel shell with 316L stainless steel internals, dished quick-opening top and leg supports. Rated 325 PSIG/FV @ 160°F. Serial #1665-3. National Board #835. Tag #18-FD-1808. Built in 2023. Previously designated as Unit B RD Diesel Filter.