Verified Compatibility

Dometic 385311641

Water Valve Kit

Dometic 385311641 is the water valve kit for the 310 Gravity-Flush Toilet and 300 / 310 / 320 Series. The valve that lets fresh water into the bowl when you press the pedal. When it wears, water either keeps trickling in after a flush or stops coming in at all.

Is it compatible?

Compatible with

  • 310 Gravity-Flush Toilet
  • 300 / 310 / 320 Series

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

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Compatible models, and the document that says so

  • 310 Gravity-Flush Toilet

    Verified against Dometic Parts List, 310 Gravity-Flush Toilet (P/N 600346224, Rev. 01/10).

  • 300 / 310 / 320 Series

    Verified against Dometic Installation and Operation Manual, 300/310/320 Series (Revision D, Form No. 600346504).

    Dometic’s own manual names the maintenance kit “300/310/320 Series Toilet Water Valve Replacement Kit”, so the water valve is shared across the three series.

How to tell which one you have

The water valve sits on the toilet base and the model ID label is directly underneath it. Lift or look under the valve to read the label.

Is this part still current?

Yes. 385311641 is listed in Dometic Parts List, 310 Gravity-Flush Toilet, P/N 600346224, Rev. 01/10, which is the current parts documentation we hold for this model. Dometic sells this number today: it is listed as Water Valve Kit (385311641) at $39.26 under spare parts on Dometic’s current US RV toilets page, read 2026-08-30. That page does not name the models it is compatible with, so the compatibility above still comes only from the 310 parts list.

Check this before you order

  • Read the model number from the label under the water valve.
  • Rule out a slow trickle that is normal: Dometic says ceramic-bowl models can trickle for up to 20 minutes after a flush.
  • If the trickle is still going after 30 minutes, Dometic says replace the water valve.

Before you start the job

Turn off and depressurise the fresh water supply before removing the valve.

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

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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
Dometic
OEM part number
385311641
Part
Water Valve Kit
Compatible models
310 Gravity-Flush Toilet; 300 / 310 / 320 Series
Status
Listed in the most recent parts documentation we hold
Primary evidence
Dometic Parts List, 310 Gravity-Flush Toilet, P/N 600346224, Rev. 01/10; Dometic Installation and Operation Manual, 300/310/320 Series, Revision D, Form No. 600346504; Dometic RV Toilets, current spare parts and accessories
Last checked
2026-08-24

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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 2026-08-24.