I'm a Plumber
Happy to come look if needed Sir
Try COKE full fat.
Scoop as much water out way as you can
Pour two liters of COKE in and leave for a couple hours
Works to unblock toilets too !
If not
Fairy liquid original
Remove as much water as possible, pour half bottle fairy liquid down plug hole, leave for 1 hour, then boil three kettles of water into a bucket and goosh it down plug hole
hot water expands fairy liquid
Jobs done
What if the blockage isnt rats teeth though?Try COKE full fat.
Pour two litres of COKE in and leave for a couple hours
What did you say pal?Nope !
My advice has failed !
Don't listen to me !
What did you say pal?
Coke
or
Fairy liquid
Im going over to look next !
Don't listen to me
Assuming there is a ‘fall’ on the bath waste and that your not shoving water uphill
Connect a hose pipe with a nozzle to mains water, put into the waste strainer on bath, seal around with a rag or suspected offenders pants.
Apply full flow through the nozzle making a tight seal with ‘pants’ to ensure all water goes down the waste pipe and not back filling the bath.
If it doesn’t unblock your f^#ked, start pulling it apart.
When you get it clear use a small amount of bleach once a month and if it starts to back up use the hose before it’s fully blocked.
If this doesn’t work it’s probably the EGR.