We have bought a wooden house from 1929 with a crawl space. Under the staircase to the upper floor, a wet room mat is laid. But in the mat, a hatch has been made, likely not by the same owner who once laid the mat. In the space, there is incoming water, a water meter, an electric heater for the radiators, a hot water heater, and a toilet.
I don't like that hatch, yet I want to keep it. It's the only way down into the crawl space. But how concerned should I be?
There is a pipe running from the floor to the ceiling from the bathroom upstairs. In that pipe, previous owners have installed a toilet (probably actually a wall-hung type) 90 degrees straight into the drainage pipe. The drainage from above is thus splattering into the toilet. I want to make a proper fitting in the floor and connect the pipes underneath the floor instead. And I also want to put up a small washbasin. As it is now, it's not possible to connect it above where the toilet connects. So I want to add a fitting for the washbasin too.
It's not a wet room, but today there is a requirement for a floor drain in a space with a VVB. Everything correct so far. Water exposure only occurs in the event of an accident, so I might consider how much damage it would cause if water ever seeps through the gaps around the hatch and perhaps take some appropriate action for that.
