Thetford 33384

Seat and Cover Assembly - White

Thetford 33384 is the seat and cover assembly - white for the Aria Classic and Aria Deluxe and Aria Deluxe III. The seat and lid, supplied together as one assembly. Thetford lists it for Aria Classic, Aria Deluxe and Aria Deluxe III.

Which models this fits

  • 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).

What this does NOT fit

Porta Potti345.Campa Potti XG. Thetford's Porta Potti345.Campa Potti XG parts list assigns 21317 to this position, not 33384.

Porta Potti345Campa Potti XG. Thetford's Porta Potti345Campa 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 Potti345.Campa Potti XG and Porta Potti345Campa 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.

Check this before you order

  • Confirm your toilet is a Aria Classic, Aria Deluxe or a Aria Deluxe III.
  • If it is a Porta Potti345.Campa Potti XG or a Porta Potti345Campa Potti XG, order 21317 instead.
  • If it is a Aqua-Magic V, order 31703 instead.
  • If it is a Aqua-Magic VI, order 31856 instead.
  • If it is a Aqua-Magic Style Lite or a 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.

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.

Checking current eBay inventory…

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Where our information comes from

We work from the manufacturer’s own documents. We have not installed this part and we do not test parts in a shop.

Last checked 2026-08-29.