I have this problem with my kitchen sink.
It is a one & one half bowl sink, which has a sink & waching machine connection 'S' bend pipe fitted.
The problem is that when we drain water from the half bowl sink, it immediately backflows into the main sink & takes ages to drain away. This drainage problem also happens with the main sink, where the water might drain away up to a point; where it then fills up again into the main sink & takes ages to drain away.
This problem also happens when we do washing. When the washing machine does its' spin cycle or refills with fresh water, the old water pushes up into the main sink and also takes ages to drain away. This obviously leaves us with a horrid smell in the house.
We have poured corrosive chemicals down the hatch to dissolve any grease or other matter, which did not solve the problem. I have disconnected all the pipes to check for any obstructions, but nothing.
We are at our witts end & don't know what else to do. With all of the drainage problems, there has also developed a foul smell coming from the outside drain. Unfortunately this is under the conservatory floor, which I am willing to lift it need be to solve the problem.
Doe anyone have a clue what to do about this? Do I change the connections to something else, do i fit addtional connections to the current pipes? Please help!!!
me personaly i would change all the connections ,put anew waste trap on when everthing is off i would insert a hose into the waste pipe and flush water thru
if you do have a external manhole lift this and flush fom that end
with seeing hard to give accurate answer
Take a look at our projects on unblocking drains and also at the one on gurgling basin. Its unlikely that an an air admittance valve will solve what seems to be a blockage underground but for the money it will cost to install it may be worth a go.
DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!