Mueller 630-004HC 3/4" X 3/4" Low Lead Brass Coupling Mueller 630-004HC 3/4" X 3/4" Low Lead Brass Coupling Features: Coupling Carefully produced and threaded to industry specifications to provide a secure and trusted fit Developed for carrying water in commercial plumbing and OEM applications, they are also used in oil, gas and steam applications Durable and highly resistant to rust and corrosion PF x PF Low lead Brass 3/4" x 3/4"