Lots of Italian families remember it well!!

It's our first caravanning experience, and I have discovered this 'black stuff' so glad it's not just our loo, was getting quite worried! So assume the way to sort this is by removing the top of the manual flush to get to the innards? What about the use of Milton ? Any good? If this stuff keeps coming back and is the norm why hasn't anyone come up with a black stuff destroyer? It looks rather gross when flushing!
Any advice appreciated for this newbie!
Ps I've tried to empty the flush ( as it looks like it may be a frost) although the water meter in the cassette housing is still showing it has water in it, what is the best way to remove all?
Thanks 👍🏻

How do you drain the flush apart from manually flushing it?

Black stuff in the flush tank is a common problem and by popular belief is caused by the use of the pink Aqua Rinse that many add to the rinse tank when filling. We've stopped using it now opting instead to buy the same product in a spray form https://www.thetford-europe.com/product/aqua-rinse-spray/ and simply spray the bowl after use. Gives a nice pleasant fresh smell without the clogging up of the tank. It also maintains and lubricates toilet seals

The remedy to your problem can be found on the Thetford website - https://www.thetford-europe.com/service/tips/ but here's the gist of it:-



This is how it works:

WHAT NEEDED: Household bleach + bucket/watering can

HOW:

Prepare a solution using 100ml household bleach per 10L of flush-water tank capacity. Prepare as much solution as needed to completely fill your flush-water tank.
Fill the flush-water tank completely with the prepared solution.
Leave it in for 24 hours.
Drain the flush-water tank by using the drain tube or flushing system.
Then fill the flush-water tank completely with fresh water and leave it in for 5 minutes.
Drain the flush-water tank again.
Repeat step 5+6 to make sure no bleach is left behind.

Note

Do not use together with other products.
Exceeding the stated dose or recommended duration could damage your Thetford toilet



As to your question regarding draining the end part of the flush tank filling tube actually swivels 180 degrees so that it points down to the ground. The plastic sight tube also pulls out and can be pointed towards the ground. Doing both of these things will drain the tank.

Thanks very much for that! 👍🏻👍🏻

Deeps do you know if this will clean the bellows as well? Or would I need to take these out and clean separately ?

The formula of the Thetford pink rinse liquid was changed a while back in response to the black gunge problem and is now labelled Aqua Rinse Plus.

Is there any real benefit to these rinse liquids? We only use plain water at home🤔

Do you have a Thetford toilet at home than?

I hesitate to say but we do like pépé le pew.