Hymer Waste water tank

[mariach]

I have an old e reg Hymer B544. There is some waste water in the water tank, but no matter which way I trun the tap, to let it out, I do not seem able to get any to come out. Any ideas of how I can get rid of any blockage, assuming there is one?

There is a bit of a smell is well, which may be coming from there. Any suggestions would be good.

Thanks

Maria

 

[Deleted member 8180]

If you can access an airline, stick it in the tap and blow it back. Can you remove the drain valve? I had a piece of plastic stuck in mine - took a while to get the valve apart but it cured it.

 

[windyjools]

On our 544, we had a smell from the waste tank, it was because the middle part of the tank had 'sagged' so there was always some water left in the tank. I managed to length of wood between the supports for the tank, which lifted the centre of the tank above the drain tap. I then 1/2 filled the tank with fresh water and added some Milton fluid, drove around for a few days, drained the tank amd the problem was solved!
Hope this helps

 

[mariach]

Thanks

Will have a look into it thei weekend. Just at the moment, when I trun the tap, nothing comes out altho I am sure there is some in there. However if it has sagged that would explain it, thanks

 

[DRoader]

Depending on the model if you can get right under the waste tank there might well be a large dump valve that will empty everything out of the waste tank. If there is I'd wear your waterproofs before unscrewing it!

 

[wints]

I'm betting that the drain tap is clogged up with grease. They will unscrew off the tank and I'm sure you'll see the grease blob.
Hope that helps.

Allen