... Ductile Iron grooved fitting with cheap price and high quality:Grooved end pipeline connection (Victaulic system, grooved end pipe fitting ... & crosses5.Size:1"-12"6.Usage:1)Automatic sprinkler system for fire protection on commercial ,civil and municipal constructions ... water supplying ,gas supplying, heat supplying,etc2)Industrial pipeline system on shipping ,mine, oil field,textile,powder plant,etc ...