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.

Which models this fits

  • 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. Dometic still lists 385311641 on its current parts list.

Where to get this part

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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.

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 2026-08-24.