When the kitchen sink refuses to give up the dirty waste-water to the drain, and the plug is in your hand, of course a problem has occurred. This will be a blockage of some kind. If you are not confident to try and sort this job, then call a professional service.Tools and Materials needed:Large Adjustable Wrench, old wire coathanger, plastic bucket, old cloths.Torch, sink plunger, small soft plastic bowl.The Process:Place the plastic bowl over the plughole upside down, and then plunge it up and down against the waste hole. Power Flushing London companies are equipped to do this. If you are lucky, you will hear gurgling noise and the water will begin to run away. If the water doesn’t run away, take the sink plunger and repeat the procedure as already described, only this time, block the overflow hole and be slightly more vigorous in your plunging action. If the water is still there, then, stays, use the basin and bail out the water from the sink and into the bucket. Empty all the stuff from underneath the sink, and put on your old clothes. Place the bucket under the sink, and with the wrench very gingerly undo the cleaning eye or, if it’s a bottle trap, the lower part of the bottle. Allow the last of the dirty water in the sink and the contents of the U-bend or bottle trap to fall into the bucket. With the wire coathanger reshaped into a probing type of hook that is the same shape as your particular trap, fish around the U-bend or in the trap, to drag out all those long, greasy strands of hair and bits of debris that has caused the blockage. Power Flush London type services can sort this task easily. Use washing-up liquid and an old toothbrush to clean up all the grease to enable the waste-water to drain away fast. Reseal the trap and run the water into the sink to check that it runs away. Make sure the system is not leaking. Cleanup, wash your hands and the job is done.“