Product Description

Upgrade your RV bathroom with the Dometic 421 Platinum Low Profile RV Toilet, the premium low-profile model in Dometic's new 420 Platinum Series. Designed to deliver residential comfort while accommodating RVs that require a lower seat height, the 421 Platinum combines a luxurious elongated porcelain bowl with a compact footprint and universal fit.

Featuring a 13-1/2" seat height, this model is ideal for RVs where cabinet clearance, platform height, or user preference makes a lower-profile toilet desirable. The premium porcelain bowl resists stains, scratches, and odors, while the soft-close polypropylene seat and hygienic dual-action foot pedal provide quiet, effortless operation.

Like the entire 400 Series, the 421 Platinum features Dometic's industry-leading 7-5/8" rough-in, allowing it to replace virtually any existing RV toilet—including many competitor brands—without modifying your bathroom layout. Its compact rear profile maximizes floor space while maintaining a full residential elongated seat.

Features & Benefits

• Genuine Dometic OEM RV toilet
• Premium elongated porcelain bowl
• Comfortable 13-1/2" low-profile seat height
• Residential-size elongated soft-close seat
• Hygienic dual-action foot pedal
  • Partial press adds water
  • Full press flushes the bowl
• Powerful 360° PowerFlush provides exceptional bowl rinse while using minimal water
• Quiet gravity flush operation
• Redesigned leak-resistant flush ball seal
• One-way odor control valve helps prevent holding tank odors
• Heavy-duty glass-reinforced water valve
• Universal 2-bolt mounting system
• Compact rear profile fits where many elongated toilets cannot
• Easy-to-clean porcelain finish
• Front-load tested for exceptional durability
• DIY-serviceable replacement components

Specifications

• Manufacturer: Dometic
• Part Number: 9610008284
• Series: 421 Platinum
• Color: Bone
• Installation Type: Permanent
• Flush Type: Gravity Flush
• Flush Control: Foot Pedal
• Seat Shape: Elongated
• Seat Height: 13-1/2"
• Overall Dimensions: 13-3/4" H × 15" W × 19" D
• Bowl Material: Premium Porcelain
• Seat Material: Polypropylene
• Hand Sprayer: Not Included
• Mounting: Universal 2-Bolt
• Minimum Rough-In: 7-5/8"

Why Choose the 421 Platinum?

The 421 Platinum is the ideal choice for RV owners who want all of the luxury features of the 420 Platinum while maintaining a lower seating height.

Compared to the standard-height 420 Platinum, the 421 offers:

• Lower 13-1/2" seat height
• Easier fit in RVs with raised bathroom floors or limited vertical clearance
• Same premium porcelain construction
• Same elongated residential seat
• Same quiet, powerful 360° PowerFlush system
• Same universal installation footprint

Universal Replacement Upgrade

The Dometic 421 Platinum is engineered to replace many existing RV toilets thanks to its:

• Universal 2-bolt mounting system
• Industry-leading 7-5/8" minimum rough-in
• Compact rear profile
• Shared footprint with many Dometic and competitor toilets

It is an excellent upgrade from many older plastic or porcelain RV toilets while requiring little or no modification.

What's Included

• Dometic 421 Platinum Low Profile Toilet
• Soft-close elongated seat and lid
• Mounting hardware
• Installation instructions

Hand sprayer not included.

Frequently Asked Questions

What is the difference between the 420 Platinum and the 421 Platinum?

The primary difference is seat height.

• 420 Platinum: Standard chair-height seating
• 421 Platinum: Low-profile 13-1/2" seat height

Both models feature the same premium porcelain bowl, elongated residential seat, 360° PowerFlush system, universal mounting, and compact rear profile.

Is this a porcelain toilet?

Yes. The 421 Platinum features a premium porcelain bowl that is highly resistant to scratches, staining, and odors.

Does this have a soft-close seat?

Yes. The elongated polypropylene seat and lid feature a soft-close design for quieter operation.

Does this include a hand sprayer?

No. This model is supplied without a hand sprayer.

Will this replace my existing RV toilet?

In many cases, yes. The universal 2-bolt mounting system and 7-5/8" minimum rough-in make the 421 Platinum compatible with many existing Dometic and competitor RV toilets. Always verify your rough-in measurement before ordering.

Why Buy from RVToiletParts.com?

At RVToiletParts.com, RV toilets are our specialty. We focus exclusively on RV toilets and replacement parts, providing knowledgeable support to help you choose the correct model for your RV. Whether you're upgrading from an older Dometic or replacing another brand, we're here to help you find the perfect fit.