Changing dometic VT 2500 toilet seals

HI Ian,

On internet "spare parts diagram-DometicVT2500"
See diagram of all parts.
When removing items 5&6 only take out two screws as third screw is for item 8 and must not be removed [it is spring loaded] if 3rd screw is removed you will need to purchase item 8 at a cost of over $100.00

Regards
David.

Too late David
The third screw has been removed and wondering where to go to next. Worked this out for ourselves too late...
Your post has been a great help and will follow up.
Trying to work on the spring and putting in this in place before we source a $100 new one.
Lots of colourful language happening in the van department.....
Cheers
Sharon

$97.13 for the part delivered if we had waited before trying to fix this.
Have learnt a valuable lesson to be patient and wait for replies on this forum..

HI Ian,

Sorry mate fell for it myself. You would think there would be notification from the manufacturer not to do this, I used to make money in my business the fair way.

Best Regards.
David.

Hi All

Same system, different problem.

I have a Dometic VT 2500 vacuum flush toilet in my 2007 BT. I am afraid it has not fared well on the Gibb River Road. Often, it will not hold a vacuum for a reasonable time period and will re-pressurise after 2 hours, or 1 hour, 20 minutes or when it is very bad, 1 minute until you need the toilet. Annoying, but this can be managed by turning the pumps off or removing the toilet cassette. Much more serious is that at present the system will not pressurize and create the vacuum. Therefore, we cannot flush the toilet and consequently cannot use the toilet. Motor works well and constantly runs trying to create the vacuum. All the pipe joints are fine. Problem would appear to be in the vacuum/base station.

Before I pull out the base station, are there any do and don’t when pulling apart these units and any suggestions where to start my investigation. Probably something has shaken loose on GRR.

Any advice welcomed.

Regards

Peter

Thanks Bod

In Kununurra now (in a caravan park with working toilets) doing a couple of tours and will attempt to fix in a day or two. Will follow your suggestions and let you know the outcome.

Regards

Peter

Bob

Just a quick update as promised. Problem was not seals but one of the plastic components. For those familiar with the VT 2500, there is an inverted cone shaped plastic tube in the base unit from the diaphragm up to a unit which appears to measure if the vacuum is reached. The thin end of the tube has snapped and had to be reconnected. I have “jerry rigged” the connection by using some 12mm clear plastic tube with a couple of hose clamps to re-establish the vacuum but I will have to re-order the correct part from Dometic when we re-turn to Melbourne.

Obviously, cleaned and re-installed all o-rings.

Thanks for advice and suggestions.

Peter

This has been all interesting reading
Thanks everyone
Another tip we practise is the care of the o-rings.
We keep them lubricated with silicone spray at regular intervals to prolong their life and make our life easier.
The whole concept of this system is good, however a pity there was no follow through for the long term product.
I still have not heard from dometic service regarding information sought in the first instance.

Cheers
Ian & Sharon