Verified Compatibility

Thetford 42135

Base, White (Low) [Water Saver

Thetford 42135 is the base, white (low) [water saver for the Aqua-Magic Residence and Aqua-Magic Style II. The moulded base the toilet sits on. Thetford lists it for Aqua-Magic Residence and Aqua-Magic Style II.

Is it compatible?

Compatible with

  • Aqua-Magic Residence
  • Aqua-Magic Style II

Every model above is named in a manufacturer parts list, cited in full further down this page.

Current eBay listings for Thetford 42135

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Compatible models, and the document that says so

  • Aqua-Magic Residence

    Verified against Thetford Parts List, Aqua-Magic Residence (Rev. D).

  • Aqua-Magic Style II

    Verified against Thetford Parts List, Aqua-Magic Style II.

How to tell which one you have

Check the model on the data plate reads Aqua-Magic Residence or Aqua-Magic Style II. This is the white version; the colour is part of the number, not a finish option. This is the low profile version.

Is this part still current?

Yes. 42135 is listed in Thetford Parts List, Aqua-Magic Residence, Rev. D, which is the current parts documentation we hold for this model.

Also worth having before you start

  • Disposable nitrile gloves

    General guidance for any waste-contact job, not specific to one manufacturer: wear protective gloves and eye protection when you touch anything that has been in contact with human waste, and disinfect your tools and work surface afterwards. If you do not already have a box in the camper, get one before you start.

These are supplies, not replacement parts. We have not matched them to your model, because they do not need to fit anything.

Check this before you order

  • Confirm your toilet is Aqua-Magic Residence or Aqua-Magic Style II.
  • Check you need white — the other colours are different part numbers.
  • Ignore listing titles that claim one part covers several models unless the manufacturer's parts lists agree.

Everything documented for this appliance

Not the part you are holding?

Search by number, or check how to tell two similar-looking parts apart before you order.

Search by part numberWhy similar parts may not fit

Current marketplace inventory

Listings from eBay

We verified the part above from manufacturer documents. The listings below are current eBay inventory, and eBay sellers set their own titles, prices and shipping.

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Camper Replacement Parts is not the seller. Price, shipping, stock and item condition are set by the eBay seller and can change at any time. We may earn a commission if you buy through these links.

Manufacturer
Thetford
OEM part number
42135
Part
Base, White (Low) [Water Saver
Compatible models
Aqua-Magic Residence; Aqua-Magic Style II
Status
Listed in the most recent parts documentation we hold
Primary evidence
Thetford Parts List, Aqua-Magic Residence, Rev. D; Thetford Parts List, Aqua-Magic Style II
Last checked
2026-08-29

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Where our information comes from

We work from the manufacturer’s own documents. We have not installed this part ourselves, so everything here comes from the documentation rather than from a workshop.

Last checked 2026-08-29.