The AquaStar ChemStar 3 inch cap is designed for compatible CH100 and CH200 feeder applications where a properly fitting cap is needed to close and service the main assembly. Caps like this are useful because they help complete the feeder body and support safe, reliable access to the interior when needed.This replacement is especially useful when the original cap is cracked, warped, difficult to secure, or no longer sealing the way it should. Because it serves both CH100 and CH200 applications, it can be a convenient repair part for supported ChemStar systems.It is a practical choice when restoring the main closure point of the feeder is part of bringing the assembly back into dependable service. AquaStar ChemStar 3 inch cap for CH100 and CH200 applications Helps close and secure the compatible feeder assembly Useful when the original cap is worn or damaged Supports cleaner service access and better assembly integrity Improves overall ChemStar feeder restoration