Gurgling Plughole

[Montycaboodle]

Hi Everybody

Small i hope problem i have is that my bath trap i believe is what they call a shallow trap, When i empty the bathroom wash basin i get a Gurgling sound coming from my bath plughole.
My wash basin is connected via a sweeping T to the bath outlet pipe, is this causing somesort of vaccum and drawing the water out of the shallow trap.
It's impossible to fit any other type of trap without lifting any floor boards up,and would mean moving the bath and all the pipe work any suggestions would be greatly appriciated.

By the way A VERY MERRY CHRISTMAS TO ALL.

Monty Caboodle

 

[ricarbo]

The design of a waste sytem is often incorrect, although information is available to avoid this sort of problem.
There are maximum lengths for waste pipes and recommended falls. Not following the rules can lead to traps being emptied, allowing drainy smell into the room.
So - without having any details of your installation, the best I can suggest is to change the basin waste trap to the type that has a little valve in it to allow air in, but not out. Sometimes called an antivac trap or a McAlpine trap. If the pipe run is accessible, you can alternatively cut it and insert one of these devices in the straight run of pipe.

 

[Montycaboodle]

Thanks Ricarbo
I take it then that if i fit a Antivac or McAlpine trap to my wash basin, it will stop sucking water out of my Shallow Bath Trap, i have a run of about 4 feet from my basin to my bath, it then connects via a sweeping T about 6 inches from the bath outlet trap, would this be in order.

Monty caboodle

 

[ricarbo]

Exactly so

 

[Montycaboodle]

Thanks Ricarbo

MERRY CHRISTMAS TO YOU

Monty Caboodle

 

[Nige F]

Antivac, Mac, OR Hep2o waste valve No waterseal in these babies