The P-5 from Everhot is a 1” Copper Cap. It's used to terminate the end of a copper pipe. 

Features:

• Wrot Copper Fittings;
• ASTM B75;
• Alloy C12200;
• NSF Certified;
• UPC Listed;

Cross reference:

•  Elkhart: 117;
• Cello: WP17;
• ueller:WC-415;
• IBCO: 617;