I noticed the bathroom sink was running water away slowly. Then I noticed the toilet although working seems to have some sort of blockage. It runs clear and then a small amount of residue is in the bottom of the bowl. I've plunged with the mop put loads of bleach down. Buckets of cold and boiling water. All to no avail. The u been is situated behind files so not able to get to it. Can anyone help ?
Using a plunger on the toilet bowl will be of no use at all, if the problem is more remote....which is why it's been suggested that you try some detective work and involve neighbours.
...and don't forget.....if you call a drains company like Dyno Rod, you will be paying the bill - even if the problem is actually in someone else's property.
My guess is you are going to struggle to lift manhole covers .. that is why I suggested eliminating the simple blockage in the toilet first.
Yes the next port of call is lifting the manhole covers and seeing what is happening there. If the drain is full up then your blockage is in the pipe leading away from the drain. If the drain is empty then your blockage is between the drain and the toilet pan. As the builder has already stated .. plunge back up the pipe from below.
We are now in territory where you will need drain rods. Things can go wrong here especially if you start pushing a blockage back into the house. At this point I would only send the drain rods back up the pipe .. no plunger attached.
Before you go trapping your fingers under a drain cover ask the neighbours if they have any problems.
do ask neighbours. You might find there's a fatberg affecting your whole street. As others have said, if you call in plumbers you may be paying for something that's actually someone else's problem.
(If rocky's recommendation doesn't work it could always come in handy as a sex toy.)
I had a similar problem two summers ago. I did the flushing and buckets thing and ended up with a thin puddle of sewage on my front drive. I believe that shared drainage is still the responsibility of the local water Authority.
^^water company (no water authorities for 30 years!).
Yes, if a blockage (or collapse) occurs in any part of the SHARED external drains/lateral sewers, it is the responsibility of your water company (England and Wales) and will incur no cost.