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 Topic: Damp Around Toilet
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21/7/2023 at 9:52am
Location: None Entered
Outfit: Lunar Quasar 525
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Some solutions which may help others. The damp warnings in the toilet area that I had at the last service have now got the all-clear at the latest service, so success!
Problem: I had damp on the wall between the sink unit/cupboard and the toilet cistern and on the floor.
Solutions:
I removed and resealed the toilet filler hatch and the toilet cassette hatch (& the battery box hatch as I was on a roll!). Cleaned and resealed with Sikaflex 522. The original sealer seemed very sparce in places.
I changed the toilet cassette hatch rubber seal.
In working on the cassette hatch I noticed that the push-button without the lock wasn't engaging properly. It looked shut, but you could prise it away from the caravan with your fingers. I took the catch apart and reassembled it correctly. I believe this had been faulty since manufacture. Push both sides of your cassette door in to ensure both catches click into place and then see if you can prise the door back (gently). This flex (front catch) will have allowed water in while driving in wet weather as well as general dampness when stood.
I discovered my sink tap was weeping occasionally at the swivel joint. This allowed water along the back of the sink worktop and down the wall between the sink unit and the toilet. Up to that point, I just put the wetness down to water splash while washing. I tried to find a replacement valve that would fit, but they all leaked. Replaced the tap. No leak.
I removed the toilet to check the flush mechanism wasn't leaking underneath. I attached it to a 12v battery on the drive and undertook tests. All ok. However, removing the toilet exposed black mold on the wall behind the cistern. The cistern has a rubber seal around its edge and was stopping the damp escaping/drying out. A nail brush and domestos removed the black staining. With toilet and hatch removed, I dried the whole area with a hot hair dryer and then left to air for days (with the outside of the cassette hatch hole loosely covered to weather proof the area).
When caravanning in the cooler months, the toilet cistern has condensation below the water line. I can't recall, but I think this goes once the freshly filled cistern water acclimatises? Anyway, a towel placed between the back of the toilet and the base of the cistern catches any drips while this is occurring and stops water on the floor.
Summary: I think the faulty cassette catch was my main culprit, followed by the occasional weeping tap and the cistern condensation. The damp problem is resolved.
Hopefully the above may be of help to others and I appreciate may have been covered in parts elsewhere. Some pics below.
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