Pack of 2 Galvanized 1/2 in. Malleable Iron Tee Plumbing Applications PLUMBING APPLICATIONS are for residential drinking water. All PIPE DECOR fittings are 100 % pressure tested, have Class 150 thickness, are certified to NSF 61 Lead Free Law. UL FM listed. Rated at maximum 300 psi at 150F or 150 psi at 300F. Not for underground applications. WHY USE GALVANIZED FITTINGS? galvanizing is done by a hot dip process, according to ASTM A153. This process makes our pipe and fittings corrosion resistant and perfect for creating towel bars, shower curtain rods, or toilet paper holders for your steamy bathroom. Or, make outdoor railings, BBQ carts, and patio furniture without worrying about unsightly rusting.