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Dometic OEM Water Valve Kit for 300/400 Series Toilets

$49.99 on Amazon.com (as of October 14, 2026, 4:10 PM EST) View details ↗

Restore the factory performance of your RV plumbing system with the genuine Dometic Water Valve Kit, specifically engineered for 300 and 400 Series Dometic and Sealand toilets. This OEM replacement part is designed to provide a seamless installation experience, ensuring that your toilet operates with the same precision and reliability as it did when new. By utilizing authentic components, you can maintain the integrity of your waste system while avoiding the complications associated with aftermarket alternatives.

Constructed with durability in mind, this valve features a glass-reinforced body and sonic-welded connections that create a robust, leak-proof seal. The design is built to withstand internal pressures of up to 1,200 PSI, ensuring consistent flushing performance and efficient water flow. Additionally, the valve is tested to endure 30,000 flush cycles, providing long-term service life for both residential and commercial RV applications.

One of the key advantages of this kit is the inclusion of a freeze damage indicator window, which allows for early detection of potential issues before they escalate into major repairs. The package includes all necessary hose clamps and fasteners, making it a complete solution for routine maintenance and service repairs. Ideal for RV owners and professional technicians alike, this kit ensures your toilet remains a reliable and efficient component of your mobile home's plumbing infrastructure.

Pressure RatingUp to 1,200 PSI
Durability Test30,000 flush cycles
MaterialGlass-reinforced plastic
CompatibilityDometic and Sealand 300/400 Series Toilets
FeaturesFreeze damage indicator window
Part Number385311641
Is this water valve compatible with Sealand brand toilets?
Yes, this kit is compatible with both Dometic and Sealand 300 and 400 series toilets.
What additional hardware is included in the kit?
The package includes the necessary hose clamps and fasteners for installation.
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