Designed with compatible specifications ( Series 300 321), this valves replaces OEM parts 385311641 / 385311658 using freeze resistant polymer and premium rubber seals for leak proof Rakiyada ' s upgraded toilet valves features welding technology for enhanced durability, cracks resistance, and extended life, making it a stable solution for bathroom maintenance Perfect for maintaining clean and functional toilets during road trips, campground stays, or seasonal storage where stable water control prevents waste buildup Ideal for owners seeking to upgrade or repair their vehicles ' s flushing systems, especially those addressing recurring leaks or issues in sanitation setups Includes straightforward installation with online video guidance, effectively resolving common flushing inefficiencies while meeting original factory standards for pressure tolerance and component integrity, Manufacturer: Woedpez