Lippert Dometic Toilet Base Seal & Mounting Hardware Kit (2022121983)

The Lippert Dometic Toilet Base Seal & Mounting Hardware Kit (2022121983) is the genuine OEM replacement gasket and hardware set that seals the base of Flow Max and Dometic 310/320 series RV toilets to the floor flange. This wax-free rubber seal is the component that prevents sewer gases and waste from escaping at the toilet-to-floor connection — a failure point that creates both a health hazard and potential floor damage if left unaddressed. When your RV toilet rocks, wobbles, or you detect odors emanating from the base, this kit contains everything needed to reseat and re-seal the unit correctly.Unlike residential wax ring installations that require replacement every time the toilet is pulled, this engineered rubber gasket is designed for the mobile environment where toilets may need to be removed and reinstalled for repairs, winterization, or RV servicing. The 3.78-inch inner diameter specification is the industry-standard dimension across a wide range of RV toilet models, making this kit broadly useful beyond just Flow Max units. Confirmed compatibility extends to Dometic 300, 310, and 320 series toilets (Dometic part cross-references: 9108923942, 9108923941, 9108781896, 9108781897), making it a single stocking solution for the most common RV toilet platforms on the road.The kit includes both the base gasket and the mounting hardware — the bolts and associated hardware that anchor the toilet to the floor flange. Having both components in a single package matters: many failed installations result from reusing worn or corroded original mounting hardware with a new seal, creating an insecure mount even with a fresh gasket in place. Lippert’s kit eliminates that failure mode by including fresh hardware engineered to the correct specification.Installation is straightforward: remove the toilet from the floor flange, clean the mating surfaces, position the new gasket, set the toilet, and torque the mounting hardware per the service manual. No special tools beyond standard hand tools are required. The compact shipping dimensions (6″ L x 5″ W x 0.6″ H, 0.23 lbs) mean this is a practical item to keep as a spare in the RV toolkit, particularly before extended trips where roadside access to parts is limited. Backed by Lippert’s 1-year warranty.

Lippert Dometic Toilet Base Seal & Mounting Hardware Kit (2022121983) Features:

• Genuine Lippert OEM replacement base seal for Flow Max RV toilets
• Cross-compatible with Dometic 300, 310, and 320 series toilets
• 3.78-inch inner diameter seal — industry-standard specification for broad compatibility
• 7-1/4-inch outer diameter provides full coverage of the floor flange interface
• Complete kit includes both base gasket and all mounting hardware bolts
• Wax-free rubber construction designed for repeated removal and reinstallation
• Prevents sewer gas intrusion and waste leakage at the toilet base connection
• Dometic cross-reference compatibility: 9108923942, 9108923941, 9108781896, 9108781897
• Compact and lightweight — practical to carry as a spare (0.23 lbs, 6″ x 5″ x 0.6″)
• 1-year manufacturer warranty; UPC: 848150055583

Lippert Dometic Toilet Base Seal & Mounting Hardware Kit (2022121983) Benefits:

• Eliminates Sewer Gas at the Source — a properly sealed toilet base is the first line of defense against hydrogen sulfide and methane intrusion into the RV living space
• Stops Base Wobble — the mounting hardware component restores the secure floor connection that prevents the toilet from rocking, which is both a comfort issue and a progressive seal-failure mechanism
• Cross-Platform Value — one kit covers both Lippert Flow Max and Dometic 310/320 units, the two most common RV toilet platforms in production trailers and motorhomes
• Complete Repair in One Package — gasket and hardware together mean no separate hardware run to complete the job; everything needed arrives in the kit
• Floor Protection — a failed base seal allows water and waste to contact the subfloor over time; replacing the seal promptly prevents the far more expensive repair of rotted flooring
• Smart Spare to Carry — at under a quarter pound and fitting in a 6-inch footprint, this belongs in the RV parts kit for any trip where plumbing access to supplies may be limited

Lippert Dometic Toilet Base Seal & Mounting Hardware Kit (2022121983) Specifications:

Lippert Dometic Toilet Base Seal & Mounting Hardware Kit (2022121983) Documents:

Nomadic Supply Company Dometic Catalog