The Zurn Wilkins 720A pressure vacuum breaker assembly is designed for compatible plumbing and backflow-prevention applications where reliable protection against backsiphonage is needed. A pressure vacuum breaker is useful because it helps protect the water supply by preventing unwanted reverse flow, supporting cleaner system operation and dependable code-focused protection.This assembly is especially useful when the original breaker is leaking, worn, damaged, or no longer functioning correctly. Matching the correct 1/2 inch 720A configuration helps preserve intended fit and restore dependable backflow-prevention performance in compatible installations.The 12-720A is a practical service part when a compatible plumbing setup needs a pressure vacuum breaker assembly to restore dependable protection and stable valve operation. Zurn Wilkins 720A pressure vacuum breaker assembly 1/2 inch configuration Designed for compatible backflow-prevention applications Useful when the original assembly is leaking or failing Supports cleaner and more dependable plumbing protection