These Epoxy Coated Ductile Iron Reducing Tee Fittings are supplied with grooved ends to permit fast installation without field preparation. Great to connect 3 Suction Plumbing to 4 Supply from your tank to pump or other types of different sized plumbing to your water distribution system. Also available in a 4 x 4 x 3 Galvanized version (243-400x300-G) Pairs with our various styles of Groove Couplings .