Thetford 33384

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Compatible models, and the document that says so

• Aria Classic

  Verified against Thetford Parts List, Aria Classic (Rev. E).

• Aria Deluxe

  Verified against Thetford Parts List, Aria Deluxe (Rev. C).

• Aria Deluxe III

  Verified against Thetford Parts List, Aria Deluxe III (Rev. E).

Not compatible with

Porta Potti 345 / Campa Potti XG. Thetford's Porta Potti 345 / Campa Potti XG parts list assigns 21317 to this position, not 33384.

Aqua-Magic V. Thetford's Aqua-Magic V parts list assigns 31703 to this position, not 33384.

Aqua-Magic VI. Thetford's Aqua-Magic VI parts list assigns 31856 to this position, not 33384.

Aqua-Magic Style Lite. Thetford's Aqua-Magic Style Lite parts list assigns 34144 to this position, not 33384.

Aqua-Magic Style Plus. Thetford's Aqua-Magic Style Plus parts list assigns 34144 to this position, not 33384.

Commonly confused with this

• 21317. 21317 is the seat and cover assembly (cp xg) listed for Porta Potti 345 / Campa Potti XG. 33384 is listed for Aria Classic, Aria Deluxe and Aria Deluxe III. They appear on separate Thetford parts lists.
• 31703. 31703 is the seat and cover assembly - white listed for Aqua-Magic V. 33384 is listed for Aria Classic, Aria Deluxe and Aria Deluxe III. They appear on separate Thetford parts lists.
• 31856. 31856 is the seat and cover assembly - white listed for Aqua-Magic VI. 33384 is listed for Aria Classic, Aria Deluxe and Aria Deluxe III. They appear on separate Thetford parts lists.
• 34144. 34144 is the seat and cover assembly - white listed for Aqua-Magic Style Lite and Aqua-Magic Style Plus. 33384 is listed for Aria Classic, Aria Deluxe and Aria Deluxe III. They appear on separate Thetford parts lists.

How to tell which one you have

Check the model on the data plate reads Aria Classic, Aria Deluxe or Aria Deluxe III. This is the white version; the colour is part of the number, not a finish option.

Is this part still current?

Thetford marks this part as limited availability.

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 Aria Classic, Aria Deluxe or Aria Deluxe III.
• If it is Porta Potti 345 / Campa Potti XG, order 21317 instead.
• If it is Aqua-Magic V, order 31703 instead.
• If it is Aqua-Magic VI, order 31856 instead.
• If it is Aqua-Magic Style Lite or Aqua-Magic Style Plus, order 34144 instead.
• 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

• Aria Deluxe — 13 part numbers
• Aria Deluxe III — 13 part numbers
• Aria Classic — 6 part numbers

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.

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.

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.

• Thetford Parts List, Aria Classic (Rev. E). Published by Thetford.
• Thetford Parts List, Aria Deluxe (Rev. C). Published by Thetford.
• Thetford Parts List, Aria Deluxe III (Rev. E). Published by Thetford.
• Thetford Parts List, Porta Potti 345 / Campa Potti XG (Rev. E). Published by Thetford.
• Thetford Parts List, Aqua-Magic V (Rev. E). Published by Thetford.
• Thetford Parts List, Aqua-Magic VI (Rev. E). Published by Thetford.
• Thetford Parts List, Aqua-Magic Style Lite (Rev. D). Published by Thetford.
• Thetford Parts List, Aqua-Magic Style Plus. Published by Thetford.

Last checked 2026-08-29.

Related parts

• Often confused with this

  Thetford 31703: Seat and Cover Assembly - White

• Often confused with this

  Thetford 31856: Seat and Cover Assembly - White

• Often confused with this

  Thetford 34144: Seat and Cover Assembly - White

• Another Thetford part

  Thetford 07101: Lip Seal