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C

Colour Republic

Hi guys been a long time but got something I can't quite figure out...

basically its its a slow running bath waste but can't figure out why as it doesn't do it all the time.

This is a long and boring post but trying to give as much info so you know what's already been tried. Sorry!!!

Quick background is that this is actually out in Spain. The old dear has just bought the property and when I arrived for a few weeks away I noticed the bath waste was taking a long time to drain away. the old dear had said it had been doing it since she bought the place and she had tried plunging it without success.

So first thing I did was put some sulphuric acid down the plug hole. It only took 100mm-150mm before it was backed up out of the plug hole. Barely enough to fill the trap, so assumed the blockage was quite close, waited 5 mins till it had drained away and added some more. Repeated until around 1L had been squirted down. I half expected to hear some bubbling or smoke coming out the trap but nothing. Left it over night, then tested the following morning. No change still slow running.

Next I tried plunging. Filled the bath with a couple of inches of water, pulled the plug and started plunging. took a while but finally it stopped offering resistance and the water started flowing away quickly. I left the tap running for another 10 minutes or so and it carried on flowing away without issue. Great finally sorted it... Or so I thought!

Next day I turn the tap on without the plug in and notice almost immediately the water backed up and draining slowly once again.... Strange maybe I just moved the blockage further down the pipe? So once again fill the bath with a couple of inches of water and plunge away until no resistance and it's all flowing nicely... water drains away and bath is empty... Turn tap on and once again the trap starts to back up. Water that was draining away fast just seconds before is now once again draining slowly.WTF?

Right now I'm ****ed off! So this time I fill the bath with 6-7 inches of water instead of the usual 2-3. Pull the plug and expect to start plunging... No need to, the water is fast running away. I can see because I can see the vortex swirl by the plug hole.


i'm stumped! I can only assume that there is some sort of siphoning going on. Either when I plunge with just a few inches of water, or is created naturally when there is 6-7 inches plus of water in the bath.

Just to recap, if there is just a few inches of water it will drain way slowly. If there is quite a bit of water it will drain fast all the way until it's empty, it's not even if it slows down again towards the end. It seems that once it is fast running it will stay that way until the bath has been emptied and the water has settled in the trap. As soon as that has happened then it goes back to slow running.

BTW the bath is tiled in so can't access the pipe work (without a hammer at least). I can make some educated guesses as to where the pipe work runs and it should be noted that I believe that an en-suite on the other side of the wall shares a main waste run, however that doesn't have any slow running issues. So again I assume the issue is quite close to the bath. I'm just trying to picture in my head what sort of blockage could cause this and how a siphoning action could be created on such a short run of pipe.

HELP!
 
Smash up the stupid tiled bath panel, I hate these things. When I do them I go to great trouble to make there easily removable but no one else seems to bother.

The decision has been made by the person who tiled it to pull it to pieces every time there is a problem.
 
Ahhh the brute force option!

Sadly not looking forward to the conversation with the old dear "So did you enjoy a relaxing holiday?"... Well yes and no, I spent 3 days trying to figure out why your bath wasn't draining, then spent the next 4 days retiling the ******* thing!
 
Cant you use a multi tool to get those tiles out without breaking them it doesn't take long and make a lil magnetic access.

Maybe you've got siphoning problem but maybe the pipework hasnt got a slop .. Maybe some joints like a T is wrong way around glued in ...
 
Bath wastepipe rising slightly not falling? when water level is high enough to create a syphon effect, it works OK?
Or, no vent or blocked vent pipe and a vacuum is forming preventing it draining unless big enough head of water is above it?
Either way, if you can't access the trap/pipe work, the panel has to come off
EDIT
Just read RPM's and Matchless's post and Ive basically said the same :6:
 
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There are a still large number of septic / cess pits in Spain so perhaps the old dear who has just brought the place doesn`t know she has one, after all would the seller pay to have it emptied unless they had to?
 
My worry is there could well be rendered breeze blocks behind the panel tiles.
 
I had this a couple of years ago, turned out that the pipe went uphill slightly but it had a NRV ( non return valve ) fitted, the NRV was clogged up with hair, a small amout of water didn't push it open but a half full bath would. Cleaned it out and put a brick under the bath waste end to stop the pipe sagging, job done.
 
most spanish baths have no legs and sit on the block panel i would work from the other end if you can and rod the pipework quite often the trap is in the floor like a gully
 
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