Thetford C-403L toilet dribble

[Donkster]

I have a small dribble from the flush outlet. My problem is the electric valve part number 23709 everything else works fine flushes ok just not closing properly leaving fine dribble.

This is what I need help with the only way that I can see to access it is via the top under the handle directly under the relay has anyone changed the valve on a C-403L before.

 

[Cheshirecat57]

Toilet Dribble- the scourge of growing old

 

[Reallyretired]

Mine has dribbled on a couple of occasions I just gave it a good flush through which removed the bit of grit or whatever from the valve. Try this before the expense of replacing

 

[dave newell]

It's probably a limescale build up inside the valve. Descale the system before you go spending money on parts. Couple of litres of white vinegar into the freshwater tank and run it through all the taps and toilet flush, let it stand for a couple of days then drain and flush it out.

D.

 

[Donkster]

I'm trying to find out what this part does in the C-403L Thetford cassette toilet picture attached.

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[Boringfrog]

I'm trying to find out what this part does in the C-403L Thetford cassette toilet picture attached.

Exploded diagrams on here:
https://thetford-europe.com/gb/products/toilets/cassette-toilets/c403-l-left

 

[rb62]

This possibly?.....but don't ask me what it does

 

[Donkster]

Thank you rb62 That has put me on the right track, It apparently stops water being able to flow back in the fresh water system also it helps stopping the water being syphoned back out from the water system. will post photos and update all when finished.

 

[The Wino]

I would try the white vinegar first!!