Shower tray waste lower than DPC

[Penelopejean]

Hello there,
We have had a shallow shower tray fitted on the ground floor by an expert plumber. The waste pipe goes out of the wall to the exterior gully but is below the dpc. I'm not sure, I but don't think the 90mm waste itself goes below the floor membrane. Are we likely to get damp under the shower tray or anywhere else up the wall behind the tiling at a later date please?
Thanks all.

 

[Burnerman]

That will be fine so long as the DPC hasn't been damaged or bridged. Obviously the hole that has been drilled needs to be sealed with sand and cement, or silicone if the gap is tiny.
John

 

[Penelopejean]

Great thanks, put my mind at rest.