2.5″ FNPT External Tank Port Part No: 500228 Material: Stainless Steel Dimensions: N/A Weight (approx.): 1.5 Case Quantity: N/A List Price: N/A Stock: In stock Description2.5" FNPT Tank Port for use with 500226 Diffuser Additional Information In stock Categories Tank Fittings for Poly Tanks Download Part Drawing Authorized users can download Solidworks 3D part model Enter approved email address to download Solidworks 3D model Download File The email entered is not valid. Contact Chris Magiera at cmagiera@fireprograms.com for access. For use when adding 2.5″ FNPT ports into a water tank with a 500226 internal tank diffuser. Requires 500223 gasket.