Costeffective solution the seal on your 400A toilet fill valve with this diaphragm washer to save on costly replacements and simplify your plumbing repairs. Robust design Made from durable materials, this diaphragm washer is designed to extend the life of your toilet fill valve while maintaining efficiency. Simple installation Quick and straightforward to install, this replacement washer is ideal for DIY home repairs without complications. Enhanced functionality Upgrading to this diaphragm washer can improve flushing action and water flow for better overall toilet performance. Use scenarios Routine maintenance on a toilet with a 400A fill valve to a worn seal and prevent leaks. DIY to restore flush strength and efficiency without replacing the entire valve. Premaintenance replacement in a use bathroom to minimize downtime and keep the toilet operating smoothly.