Non-Automotive / Other

Dometic USA

R/F UNIV ONYX 20FT

$378.49

SKU: D018 R3314989NR.420

In Stock
In Stock
Ships by Jun 9
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The Dometic 400 Series toilets are designed for RVs, offering a compact fit with a shortened rear profile to reclaim bathroom space. They feature residential-style seating and quiet, soft-close comfort. Built on a unified platform, the 400 Series (which includes models 400, 410, and 420) provides seamless installations and upgrade options, allowing users to choose between heavy-duty plastic or premium porcelain, and round or elongated bowls. Installation is simplified with a standard 7–5/8" rough-in, universal 2-bolt mount, and tool-free seal replacement. These toilets are tested to withstand 150,000 flush cycles and double the competitor's weight load capacity, ensuring reliability. They are assembled in the USA.

Fitment

Fitment Guaranteed

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on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandDometic USA
Part NumberD018 R3314989NR.420

Videos

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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