Can Seaflo Ceramic RV Toilet w/ Sprayer Attachment Replace Dometic 300 Series
Updated 01/19/2026 | Published 12/16/2025
Question:
Can this replace my Dometic 300 series toilet?
asked by: Luke
0
Expert Reply:
Hey Luke! It may be possible to replace your Dometic 300 series with the Seaflo Ceramic RV Toilet w/ Sprayer Attachment # SE42MR but you will need to measure to be sure. This toilet requires a rough-in measurement of 10" for installation. This is the distance from the wall to the center of the door flange, see the attached photo. If you meet this requirement you will be able to install the Seaflo in your trailer.
What kind of trailer do you have?
expert reply by:
Robin H
0
Rough-In Measurement
(click to enlarge)
(click to enlarge)
Product Page this Question was Asked From
Seaflo Ceramic RV Toilet w/ Sprayer Attachment - Elongated Seat and Bowl - Slow Close Lid - White
- RV Toilets
- Standard Height
- Elongated
- Hand Sprayer
- Slow Close Lid
- 10 Inch Rough-In
- Gravity Flush Toilet
- Triple Jet - Good
- Ceramic
- White
- Seaflo
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Video: Installing the Seaflo Ceramic RV Toilet with Sprayer in a 2014 Keystone Bullet Ultra Lite Travel Tra
- Shop: Seaflo Ceramic RV Toilet w/ Sprayer Attachment - Elongated Seat and Bowl - Slow Close Lid - White
- Shop: Seaflo Ceramic RV Toilet - Elongated Seat and Bowl - Slow Close Lid - White
- Search Results: trailer fenders
- Search Results: trailer fenders accessories and parts
- Search Results: inner fender
- Video: A Closer Look at the Seaflo Ceramic RV Toilet with Sprayer Attachment and Elongated Seat and Bowl
- Video: Installing the Seaflo Ceramic RV Toilet in a 2022 Grand Design Imagine Travel Trailer
- Video: Review of Seaflo RV Toilets - Standard Height - SE92MR
- Search Results: black tanks
- Search Results: rv toilets
- Shop: Dometic 411 RV Toilet - Low Profile - Round Bowl - Slow Close Lid - White Ceramic
- Q&A: Good Recommendation For An Electric Jack For My 2024 Airstream
- Q&A: Looking For New Axles And Hubs For 1973 Airstream
- Q&A: What is Outer Diameter of Flair It High Pressure Hose part # FL57FR
- Q&A: Best Flexible Potable Water Tubing For RV Hot And Cold Lines
- Shop: Hike Crew RV Roof Vent w/ 12V Fan & LED - Thermostat - Remote - Powered Lift - 10 Speed - 16"
- Shop: MaxxAir MaxxFan Mini Roof Vent w/ 12V Fan - Manual Lift - 4 Speed - Black
- Shop: MaxxFan Mini Plus Manual RV Roof Vent w/ 12V Fan - LED Light - White
- Shop: MaxxFan Plus Roof Vent w/ 12V Fan and Thermostat - Manual Lift - 4 Speed - White
- Q&A: Can Flair-It High Pressure Hose # FL57FR be Used with PEX Crimp Rings
- Shop: Fifth Wheel Hitch
- Article: How (and Where) to Connect an RV Propane Grill
- Shop: Vehicle Engine Heaters
- Video: Victron MultiPlus-II Inverter Charger Installation Guide
- Q&A: Is the Flair-It High Pressure Hose Able to be Used W/ a Pressure Washer
- Video: Discussing factory replacements and upgrades with the manufacturer.
- Video: An inside look at the multifunction control panel
- Q&A: How Does Old Sprayer Head for B&B Spinweld Sprayer Get Removed
- Search Results: rv plumbing pipe and fittings
Robin H.
1/19/2026
Hey Luke, did the Seaflo ceramic toilet end up fitting your trailer once you checked that 10-inch rough-in measurement? Knowing how it worked out could help others looking to replace their Dometic 300 series too.