What is the Replacement Model Toilet for a 34421 Thetford Aqua Magic Style Plus RV Toilet?
Updated 08/16/2026 | Published 08/10/2026
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Question:
I have a 2017 Tiffin Phaeton with a Thetford 34421 toilet. The toilet does not hold water in the bowl. Have replaced the seals but still doesnt hold. What is the replacement toilet for this Model? Is it an exact replacement?? Thanks
asked by: Lynn M
Expert Reply:
Welcome back Lynn! The Thetford Aqua-Magic VI RV Toilet item # TH37SE is going to be the direct replacement for your Thetford 34421 toilet, which is part of the older Aqua Magic Style Plus line.
The Aqua-Magic VI RV Toilet item # TH37SE is going to fit in the exact same spot as your 34421 toilet so you won't have to worry about moving or changing your sewer or water lines. It only requires 7-5/8" of rough in clearance because it's designed to be compact. It has a ADA-compliant 18" seat height, a slow-close residential sized toilet seat, and a two stage foot flush pedal.
Are you looking at making any other upgrades to your Phaeton's bathroom when you replace your 34421 toilet? You can also add the Hand Sprayer for Thetford RV Toilets item # TH77UE to the Aqua-Magic VI RV Toilet item # TH37SE.
(click to enlarge)
(click to enlarge)
Expert Reply:
Welcome back Lynn! The Thetford Aqua-Magic VI RV Toilet item # TH37SE is going to be the direct replacement for your Thetford 34421 toilet, which is part of the older Aqua Magic Style Plus line.
The Aqua-Magic VI RV Toilet item # TH37SE is going to fit in the exact same spot as your 34421 toilet so you won't have to worry about moving or changing your sewer or water lines. It only requires 7-5/8" of rough in clearance because it's designed to be compact. It has a ADA-compliant 18" seat height, a slow-close residential sized toilet seat, and a two stage foot flush pedal.
Are you looking at making any other upgrades to your Phaeton's bathroom when you replace your 34421 toilet? You can also add the Hand Sprayer for Thetford RV Toilets item # TH77UE to the Aqua-Magic VI RV Toilet item # TH37SE.
Product Page this Question was Asked From
Thetford Aqua-Magic VI RV Toilet - Standard Height - Round Bowl - Slow Close - White Polypropylene
- RV Toilets
- Standard Height
- Round
- Slow Close Lid
- 7-5/8 Inch Rough-In
- Gravity Flush Toilet
- 360 Swirl - Better
- Plastic
- White
- Thetford
more information >
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