Dometic Model 400 RV Toilet — Round 18" Chair Height, Bone, Lightweight Gravity-Flush with Soft-Close Seat

The Dometic Model 400 Essential is a featherlight, full-size RV gravity-flush toilet that fits standard 2-bolt rough-ins and delivers residential comfort in a space-saving package.

Built for mobile living, this toilet pairs a durable, lightweight plastic bowl with an 18-inch chair height and a soft-close residential seat to make RV bathrooms feel more like home. Its compact rear profile and universal 2-bolt mounting system let you replace many existing RV toilets without altering the floorplan, while the efficient spray-flush design minimizes water use and improves bowl coverage for quieter, cleaner rinses.

Will the Model 400 replace my current RV toilet without remodeling?

Yes — the Model 400 is engineered for straightforward drop-in swaps. The universal two-bolt mount and shared footprint match standard RV rough-ins of 7.625 inches or greater, so most replacements require no new floor modifications.

• Universal 2-bolt mounting fits common 7.625"+ rough-ins
• Same footprint as many competitor models for easy replacement
• Compact rear profile avoids moving plumbing or walls

How does it balance weight, durability, and residential comfort?

The body is molded from heavy-duty plastic that reduces overall weight without sacrificing the full-size bowl shape and chair-height comfort. That balance is ideal for RVs where lowering weight matters but standard toilet ergonomics are preferred.

• Featherlight plastic construction saves vehicle payload
• 18" chair height matches residential toilets for comfort
• Full-size round bowl offers familiar seating and support

What makes the flush and seat design user-friendly?

The gravity spray-flush system is tuned to cover the bowl efficiently while keeping noise and water use low. Complementing that, the soft-close seat and lid include a position-lock hinge so the lid can be held upright for cleaning or loading, and closes quietly without slamming.

• Spray-flush delivers full bowl coverage with reduced water consumption
• Quieter operation compared with older flush mechanisms
• Soft-close seat with position-lock hinge for cleaning convenience

Does it work in smaller bathrooms and cramped layouts?

The Model 400’s signature compact rear profile reduces the distance the toilet projects into the bathroom, freeing floor space in tighter conversions and RV bathrooms. That design makes it a practical choice when you need residential comfort but have limited square footage.

• Compact rear profile fits tighter rear-wall spaces
• Frees up floor room for storage or shower access
• Compatible with 400 Series upgrades for consistent layout options

Who is this for: The Dometic Model 400 Essential is aimed at RV owners, van builders, and motorhome renovators who want a lightweight, residential-height toilet that installs easily into standard 2-bolt rough-ins. It suits anyone seeking quieter, more efficient flushing with a comfortable chair height and a soft-close seat, particularly where space and vehicle payload are concerns. Choose the Model 400 when you want a direct, practical upgrade that reduces weight but keeps the look and feel of a home-style toilet in a mobile environment.