Toilet bowl water - where has it gone?

Toilet bowl water - where has it gone?

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Corvid-2020

Original Poster:

1,994 posts

79 months

Tuesday 1st December 2020
quotequote all
Came downstairs this morn and went to use the toilet in the utility room and noticed that the water in the bowl was, well not there! There is a lute on the drain soby natural draining at least 4" of water should have been waterlocked.

I'd have been the last person to use the loo last night and the "bloo loo" bowl water was present then.

Haven't flushed to refill as if there is a leak I don't want to add to it. Visible floor appears dry. Floor is Italian marble over chipboard with a void underneath to ground at a guess.

Soil pipe goes straight under floor outside to drain manhole. No other connections into soil pipe, room is ground floor.

First heavy frost last night anything to do with it?

Corvid-2020

Original Poster:

1,994 posts

79 months

Tuesday 1st December 2020
quotequote all
No, soil stack looks to just have a curved wire grill / mesh over the top rather than a valve. (Tis a rather dodgy plumbed house). Upstairs toilet on same stack is fine.

Corvid-2020

Original Poster:

1,994 posts

79 months

Tuesday 1st December 2020
quotequote all
Flushed. Water back.

Seems to be at normal level, fortunately "household cleaning regime" means there is a historical level marked I can check against.

The outside drains are "common". I'd just be surprised that enough of a vacuum could be pulled by some event in the drain, whilst remaining waterlocked, though we are the last house before the common drain hits to road so could be possible, but wouldn't that have pulled on teh seal on the upstairs loo as well?

Corvid-2020

Original Poster:

1,994 posts

79 months

Tuesday 1st December 2020
quotequote all
Was about to edit post further up, realised you'd need more vac (~0.3 bara) to pull the upstair lute free of water, but a small event could be enough to pull the downstairs loo.

No dog, but the cats litter tray is being monitored to see if the litter turns blue.

Wifes friend has just texted her to say "definitely rats". I decided to agree and told her she better not sit down on teh loo in case a rats bites her bum! Funny watching her pee standing up al la the scene in the Full Monty.

So the toilet lid is down and a pan of hot water next to it "for when the rats come knocking"....

.....going to be a fun paranoid few days.

Corvid-2020

Original Poster:

1,994 posts

79 months

Tuesday 1st December 2020
quotequote all
Stuck an endoscope down. Direct to drain, doesn't join soil stack that comes down right next to it!!!

The went out this avo to see a UU van and a man poking things down a new hole in our road. He didn't think is was necessarily what they were doing, but he also mentioned the toilet roll mopping thing which sounds plausible, something about that loo and recycled toilet paper, it was never a good flusher, usually needed two or three flushes or a bowl of washing up water through as well, if you have recently tied to Sink the Bismark.

Haven't told wife though. Have instead installed a "rat proof" layer of clingfilm. I await my death..................................