I have a blocked flush system on an old thetford cassette C2 manual flush.Does anyone have any experience with this sort of problem and how to fix it

[D Brent]

The flush system liquid will not come out into the bowl. I cant work out how to get to the pipe work to enable me to unblock it.

 

[Jcloughie]

We have a Dometic toilet. The flush recently broke so I needed to get into the tank to fix it. I removed the control panel and can see the top of the tank, but just not enough room to do any maintenance. The loo had to come out. I could not find anything useful on line. The base has 6 screws accessible from the outside. The rear of the toilet is hooked onto a bracket, but the fill pipe will not allow it to be lifted off. eventually I found that by removing the ducting at the base I could twist it off.

After that it could be fully serviced and cleaned.

A Thetford would be similar but may have YouTube help


John

PS, ignore the above, wrong advice for a C2 😡

 

[Gafferbill]

.....remove the toilet roll holder casing to gain access to the flush tank,flush pump and pipework.
It is a push fit and just pulls out ....may need a bit of jiggling!

 

[audiorob]

Not sure it helps a load but there are user manuals and exploded parts diagrams on here
C2 / C3 / C4 - No longer available | Thetford (thetford-europe.com)

 

[Lutz]

I have had the same problem. In order to avoid having to dismantle anything I used a pipe cleaner, attached it to the end of a flexible braided cable slightly smaller than the inside diameter of the pipework and about 3ft long and pushed that through the flushing system.

 

[Hutch]

.....remove the toilet roll holder casing to gain access to the flush tank,flush pump and pipework.
It is a push fit and just pulls out ....may need a bit of jiggling!

Ah the words of a long time caravanner.

 

[D Brent]

.....remove the toilet roll holder casing to gain access to the flush tank,flush pump and pipework.
It is a push fit and just pulls out ....may need a bit of jiggling!

HI Gafferbill,
my one is a manual flush so where the toilet roll holder would be on an electric it is a twist flush. I've had that out but got down to the clear squishy thing that I assume does the flushing. not sure where to go from here. Worried about forcing anything.

 

[D Brent]

I have had the same problem. In order to avoid having to dismantle anything I used a pipe cleaner, attached it to the end of a flexible braided cable slightly smaller than the inside diameter of the pipework and about 3ft long and pushed that through the flushing system.

HI Lutz,
This sounds interesting...which way did you go in? From bowl?

 

[D Brent]

Not sure it helps a load but there are user manuals and exploded parts diagrams on here
C2 / C3 / C4 - No longer available | Thetford (thetford-europe.com)

This helps greatly..Thankyou..

 

[D Brent]

Just found out mines a C4 not a C2.. By reading the manual!!

 

[D Brent]

Update!! SOLVED.. Thankyou to everyone. After finding out that I had been searching for help for the wrong model I quickly found this really helpful guide.

https://caravanchronicles.files.wordpress.com/2013/03/sanitation_repair_instructions.pdf

Absolutely brilliant.

 

[audiorob]

Excellent and thank you for updating the forum with a useful link for others. I think we can agree that you are flushed with success!