1-1/2" and 2" bulkhead union kit, includes 2 slip filt adapters. Used for installations without a valve. Other Products Using This Part: 180008 FNSP48 - FNS Plus 48sqft Vertical Grid D.E. Filter 180009 FNSP60 - FNS Plus 60sqft Vertical Grid D.E. Filter 180007 FNSP36 - FNS Plus 36sqft Vertical Grid D.E. Filter 140315 TR100C 30" Commercial Sand Filter - Almond Color 140243 TR140 36" Sand Filter, Side Mount Valve Sold Separately 140210 TR100 30" Sand Filter, Valve Not Included 140264 TR60 24" Sand Filter, Side Mount Valve Sold Separately 140210 TR100 30" Sand Filter, Valve Not Included 140243 TR140 36" Sand Filter, Side Mount Valve Sold Separately 140264 TR60 24" Sand Filter, Side Mount Valve Sold Separately