New wetroom drainage help

[RobTi]

hi so got a disabled adaptation wetroom fitted a few weeks ago,it has a preformed tray that is recessed into the floor then vinyl floor cover over whole floor. Now this has a 90mm waste but rather than a trap this has a horizontal flap which is always covered with water. Now if I turn shower on to a more forceful flow my bathroom floor fills up with water and eventually I have to stop the shower when the water reaches the threshold bar at the door and takes a few minutes to drain away.
So is this normal with a wetroom instal and any info on this trap ?
Thanks

 

[Madrab]

Sounds like the waste is restricted somewhere along its run, time to get someone in to blast it or rod it

 

[terryplumb]

Not normal at all ,should drain adequately. Contact installers and request they remedy the problem .do not meddle with anything yourself ,you shouldn't have to.

 

[Madrab]

oops, missed that part re the new install.

Yup, +1, get them back in as the waste should be able to handle at least as much water as the shower can deliver at max output

 

[RobTi]

Many thanks for your help will contact them