What Material are the Bypass Valve and Valve Head Made of? January 31, 2025 16:46 Updated They are made of a plastic called Celcon and both products are NSF stamped. Bypass Valve: Valve Head: Related articles How Much Resin Should Be in the Tank? Welcome to the EcoPure Water Softener Family What happens if I run out of salt? Whole Home Filters What Should Be Displayed on the Screen When It First Turns On?