THETFORD 42138 Style 2 Toilet Base Only - Reliable RV Replacement

In this review of the THETFORD 42138 Style 2 toilet base only, the bottom line is straightforward: it is a practical replacement part for RV and mobile bathroom repairs that restores function without the cost of a full unit. Thetford's reputation for mobile sanitation is central here; this base kit is aimed at owners who need a durable, correct-fit foundation for their existing Style II assemblies. Installation simplicity and compatibility are the single biggest reasons to consider this base rather than replacing the entire toilet.

Key Features

• Base Kit High Bone Style II: Provides the correct molded replacement base that restores the toilet mounting and bowl alignment in most Style II setups.
• Brand: Thetford is the market leader in mobile sanitation, so buyers get a product designed for RV and marine use with practical durability.
• Thetford part number 42138: The specific part number makes it straightforward to match to existing Style II components and ensures compatibility with related Thetford parts.
• Cost effective: Replacing just the base is a less expensive path than buying a full toilet, and customers report good value for money when repairing travel trailer bathrooms.
• Fit with 42050: Users note a precise fit with the 42050 model, making this base a sensible option for that pairing.

Who It's For

This product is best for RV, camper, and marine owners who have a Style II Thetford toilet where the base has been damaged, cracked, or otherwise failed but the upper components remain serviceable. It suits DIYers and technicians comfortable with basic plumbing and mounting work who want a focused fix without replacing the entire bowl and tank assembly.

It is not for buyers who need a complete toilet replacement, those seeking a new seat or cover (the cover is not included), or users who require a different style of base. If persistent leakage has been an issue on your unit, inspect seals and follow manufacturer guidance, since outcomes vary by installation and seal condition.

Pros & Cons

Pros

• Easy to install for most users, restoring bathroom functionality quickly.
• Good functionality and quality consistent with Thetford's reputation.
• More affordable than replacing the complete toilet unit and fits well with the 42050 model.

Cons

• Cover is not included so buyers needing a lid must purchase separately or reuse their existing cover.
• Some users report mixed results with leakage depending on seals and installation, so care is required during fitment.

Specifications

Our Verdict

The THETFORD 42138 Style 2 toilet base only is a sensible, value-minded replacement for anyone repairing a Style II toilet in an RV or boat. It delivers solid fit and functionality from a trusted brand and keeps costs down compared with a full unit swap; just be mindful that seals and the missing cover require attention during installation.

Frequently Asked Questions

Does the kit include a seat or cover?
No, this listing is for the base only; the cover and seat are not included.

Is this compatible with my 42050 toilet?
Many customers report a precise fit with the Thetford 42050 model, but verify part numbers before purchase.

Will this stop leaks?
The base itself is sound, but leakage results are mixed depending on seal condition and installation, so replace seals and follow instructions carefully.