Verified Compatibility

Thetford 23709

Electric Valve, Hose Nut, and Hose Barb

Thetford 23709 is the electric valve, hose nut, and hose barb for the Cassette C200S-CS and Cassette C223CS and Cassette C223S and Cassette C402C / C403L. The electrically operated water valve, supplied with its hose nut and hose barb. Thetford lists it for Cassette C200S-CS, Cassette C223CS, Cassette C223S and Cassette C402C / C403L. It is item 2 and 4 and 6 depending on the list.

Is it compatible?

Compatible with

  • Cassette C200S-CS
  • Cassette C223CS
  • Cassette C223S
  • Cassette C402C / C403L

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

Current eBay listings for Thetford 23709

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eBay carries exact OEM numbers, discontinued parts and old stock that general retailers drop, which is usually where a part this specific turns up.

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Compatible models, and the document that says so

  • Cassette C200S-CS

    Verified against Thetford Parts List, Cassette C200S-CS (Rev. D).

    Item 2 on this parts list.

  • Cassette C223CS

    Verified against Thetford Parts List, Cassette C223CS (Rev. D).

    Item 4 on this parts list.

  • Cassette C223S

    Verified against Thetford Parts List, Cassette C223S (Rev. D).

    Item 4 on this parts list.

  • Cassette C402C / C403L

    Verified against Thetford Parts List, Cassette C402C / C403L (Rev. D).

    Item 6 on this parts list.

How to tell which one you have

Find item 2 or 4 or 6 on your model’s parts diagram — that callout is this part. Check the model on the data plate reads Cassette C200S-CS, Cassette C223CS, Cassette C223S or Cassette C402C / C403L.

Is this part still current?

Yes. 23709 is listed in Thetford Parts List, Cassette C200S-CS, Rev. D, which is the current parts documentation we hold for this model.

Also worth having before you start

  • Thetford seal lube and conditioner

    A new seal lasts longer if it is kept conditioned. Thetford makes this for its own toilets, so it is the maintenance product matched to the part you are fitting.

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 Cassette C200S-CS, Cassette C223CS, Cassette C223S or Cassette C402C / C403L.
  • 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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Manufacturer
Thetford
OEM part number
23709
Part
Electric Valve, Hose Nut, and Hose Barb
Compatible models
Cassette C200S-CS; Cassette C223CS; Cassette C223S; Cassette C402C / C403L
Status
Listed in the most recent parts documentation we hold
Primary evidence
Thetford Parts List, Cassette C200S-CS, Rev. D; Thetford Parts List, Cassette C223CS, Rev. D; Thetford Parts List, Cassette C223S, Rev. D; Thetford Parts List, Cassette C402C / C403L, Rev. D
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.