Thetford cassette toilet (1 Viewer)

[Christy]

I have 2012 Swift Sundance which is new to me. When i picked it up the toilet flushed. I have recently emptied the cassette. Now the toilet tries to flush, the motor runs but no water comes out. I'm not sure if it has a separate water tank or fills from the main water tank, which was emptied but i have recently refilled.

Any clues on what to do would be gratefully received.

Thanks

 

[MisterB]

are you getting water from the bathroom tap? is there an external fill point just for the toilet on the outside wall near the toilet cistern?

 

[Madcaravanner]

Sometimes even with a full header tank the pump gets an air lock but check first hether you do have a header tank we find it lasts us 4-5 days in continual use when the cassette lasts 3 days

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[Minxy]

Sounds like your toilet may have it's own flush water tank - see if you can identify exactly which one it is from here:

Thetford caravan and motorhome cassette toilets C200 CW CS C-250CWE Porta Potti

EXPRESS DELIVERY ON Thetford and Dometic Chemical Cassette Toilets for caravans motorhomes and marine

www.jacksons-camping.co.uk

 

[Christy]

are you getting water from the bathroom tap? is there an external fill point just for the toilet on the outside wall near the toilet cistern?

Yes to bathroom tap. No external fill point

 

[Christy]

Sounds like your toilet may have it's own flush water tank - see if you can identify exactly which one it is from here:

Thetford caravan and motorhome cassette toilets C200 CW CS C-250CWE Porta Potti

EXPRESS DELIVERY ON Thetford and Dometic Chemical Cassette Toilets for caravans motorhomes and marine

www.jacksons-camping.co.uk

It’s definitely the C402

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[Landy Andy]

Now the toilet tries to flush, the motor runs but no water comes out

When you say “tries to flush, motor runs” are you saying you can hear the water pump running? As in the same water pump that runs when you operate the tap in the basin?

Is it possible that you just need to operate the flush button for longer as to get the air out and the water through, as you have drained it down.

If it’s not the water pump running then you could just be hearing the extraction fan that thetford fit to remove smells. This is very much quieter than the water pump.

 

[Minxy]

It’s definitely the C402

In which case it looks like it has it's own flush tank - have you had a look inside the cassette door to see if there's a filler in there? It should have something like the top pipe with the green cap shown in this picture:

This model toilet also comes with its unique water tank flushing system that is filled from the outside, through its lockable service door. One advantage of this is that there is extra storage for the water and also the user will not depend on the water from the RV tanks for them to flush their toilets, therefore the user will be able to put Pink rinse on the top tank. ​

Thetford C402C Caravan Campervan Motorhome Cassette Toilet

Thetford C402C Cassette Toilet Door. A holding tank with wheels and a convenient retractible handle are just two fo the features of this built-in bench toilet.

www.rainbow-conversions.co.uk

Some images here:

<Broken link removed>

 

[Christy]

yes it is definitely the C402 .Thanks Minxy Girl . The filler pipe is full though. When I try to flush the motor for the flushing system works but nothing comes out into the pan. It's almost as if it is blocked or got an airlock or something. So the pump seems to be working but no water.

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[SMB]

The filler pipe is gravity-fed so just pour water in and the level in the filler pipe will remain the same but the tank will fill up. There is a clear tube to the left of the compartment running from bottom to top, this indicates the level of water in the tank which I believe holds 15 litres (it confused me the first time as well). Ps because the tank is separate from the main water tank I add some thetford pink or similar to keep the tank fresh and the flush water helps keep the toilet bowl sweet-smelling. Hope this helps

 

[Reallyretired]

Avoid the pink additive. It promotes the growth of black mould that can clog up the pipes.

 

[Christy]

The filler pipe is gravity-fed so just pour water in and the level in the filler pipe will remain the same but the tank will fill up. There is a clear tube to the left of the compartment running from bottom to top, this indicates the level of water in the tank which I believe holds 15 litres (it confused me the first time as well). Ps because the tank is separate from the main water tank I add some thetford pink or similar to keep the tank fresh and the flush water helps keep the toilet bowl sweet-smelling. Hope this helps

OK thanks folks i have been completely dense on this matter (sic). I looked at the filler pipe and as there was water to the top thought it was full. Didn't realise it was gravity fed.

Thanks all for your help.

Bought this 2 weeks before lockdown and desperate to go away.

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[Minxy]

Well tell us then ... have you gone and stuck more water in and got it flushing? We can't stand the suspense!

 

[SMB]

Avoid the pink additive. It promotes the growth of black mould that can clog up the pipes.

I've been using it for seven years in the same system without any problems but obviously I can't see all the pipework. Is there any reviews or references to this anywhere? If this is the case I would reconsider using it. Edit: looked on the internet and there are forums on it, seem inconclusive but I will bear it in mind if I ever get black bits in the system. Because we full-time the loo is in regular use, maybe this is why we haven't had any problems

 

[Minxy]

I've been using it for seven years in the same system without any problems but obviously I can't see all the pipework. Is there any reviews or references to this anywhere? If this is the case I would reconsider using it. Edit: looked on the internet and there are forums on it, seem inconclusive but I will bear it in mind if I ever get black bits in the system. Because we full-time the loo is in regular use, maybe this is why we haven't had any problems

I suspect the black bits are only an issue if a loo isn't used much so certainly sounds like constant use negates it.

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[Christy]

Well tell us then ... have you gone and stuck more water in and got it flushing? We can't stand the suspense!

Well I have looked deep into the matter and feel a bit flushed that I did not know what I was doing and my waters are flowing freely now.

 

[Puddleduck]

Glad you got it sorted Christy

We do love a boggy thread

 

[SMB]

Well I have looked deep into the matter and feel a bit flushed that I did not know what I was doing and my waters are flowing freely now.

Glad to hear that . If you have any other questions just PM me, I have the 2011 model Sundance 630L

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[Minxy]

Well I have looked deep into the matter and feel a bit flushed that I did not know what I was doing and my waters are flowing freely now.

S*d that ... what about the toilet?

 

[Bec]

You need the

I have 2012 Swift Sundance which is new to me. When i picked it up the toilet flushed. I have recently emptied the cassette. Now the toilet tries to flush, the motor runs but no water comes out. I'm not sure if it has a separate water tank or fills from the main water tank, which was emptied but i have recently refilled.

Any clues on what to do would be gratefully received.

Tha

I have 2012 Swift Sundance which is new to me. When i picked it up the toilet flushed. I have recently emptied the cassette. Now the toilet tries to flush, the motor runs but no water comes out. I'm not sure if it has a separate water tank or fills from the main water tank, which was emptied but i have recently refilled.

Any clues on what to do would be gratefully received.

Thanks

You need to use the detachable green filler funnel thing to avoid an airlock. I don't see how it works but it does.

 

[Reallyretired]

I've been using it for seven years in the same system without any problems but obviously I can't see all the pipework. Is there any reviews or references to this anywhere? If this is the case I would reconsider using it. Edit: looked on the internet and there are forums on it, seem inconclusive but I will bear it in mind if I ever get black bits in the system. Because we full-time the loo is in regular use, maybe this is why we haven't had any problems

Think its only a problem if it sits around in the pipes for a long period, constant use will flush out any mould growth.

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