So...
groundworks due to commence on my double storey extension in place of conservatory. Removed the conservatory carpet to see some crumbling self levelling screed and some DPM sticking through. A tap with an iron bar and soon found I have a sealed manhole there.
The pipe runs straight through, but the invert is 1700mm deep. About 3 metres back (and outside of the line of our foundations is an inspection cover at 500IL with some pipes joining from a gully and ensuite.
What is missing is some point at which the pipe drops to such a depth, and also where the SVP from the main bathroom joins. (Yes, I've done loo-paper checks and it appears in the deep one, but not the shallow 1!
Biggest problem is that the manhole is close the foundation line and the room will be a kitchen. Even if I retained the sealed cover, it would be half way under a run of units. As it is a straight through, can the manhole be filled in?
Will I have to have another manhole under the floor whereever the missing joint / deepening is?
The floor will be block and beam for heave protections. Luckily not ordered this yet, how do you incorporate a sealed drain into that?
groundworks due to commence on my double storey extension in place of conservatory. Removed the conservatory carpet to see some crumbling self levelling screed and some DPM sticking through. A tap with an iron bar and soon found I have a sealed manhole there.
The pipe runs straight through, but the invert is 1700mm deep. About 3 metres back (and outside of the line of our foundations is an inspection cover at 500IL with some pipes joining from a gully and ensuite.
What is missing is some point at which the pipe drops to such a depth, and also where the SVP from the main bathroom joins. (Yes, I've done loo-paper checks and it appears in the deep one, but not the shallow 1!
Biggest problem is that the manhole is close the foundation line and the room will be a kitchen. Even if I retained the sealed cover, it would be half way under a run of units. As it is a straight through, can the manhole be filled in?
Will I have to have another manhole under the floor whereever the missing joint / deepening is?
The floor will be block and beam for heave protections. Luckily not ordered this yet, how do you incorporate a sealed drain into that?