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The NIBCO S-595-Y-66-12 is a three-piece bronze ball valve designed for reliable shutoff in commercial, mechanical, and industrial piping systems. It operates with a quarter-turn (90 degrees) lever handle, moving from fully open to fully closed with a single motion. The valve features solder ends for a clean, leak-resistant connection and is built for use in systems where durability and ease of service are priorities. Licensed plumbers and mechanical contractors are the primary installers of this valve type.
This valve is suited for commercial mechanical rooms, industrial process lines, and residential plumbing applications where a compact, serviceable shutoff is required. The three-piece body design allows for in-line removal of the ball and seats without cutting out the valve, simplifying maintenance. Solder-end connections make it compatible with standard copper tube installations common in hydronic, domestic water, and light industrial service.
Designed as an OEM-style replacement or direct installation valve for copper tube systems using solder-end connections in commercial, mechanical, and industrial plumbing applications.
Installation should be performed by a licensed plumber following applicable local plumbing codes and IPC guidelines. Shut off and drain the system and allow all components to reach ambient temperature before soldering. Avoid applying torch heat directly to the valve body during soldering to protect internal seals and seats. Consult the NIBCO technical data sheet and valve selection guide for engineering specifications before installation.
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