I have a property that was built in 1972 - no plans available.

Spoke to previous owners and original architect - did not keep plans.

Talked to City's building department - any plans prior to 1974 was on
microfilm and was destroyed by some parasite and no longer available.

How, I have a drainage problem. The house is a wrap around house (rooms on
four sides) with the pool in the middle. The pool opening has a doomed
shape screen on top. When it rains really heavily, rain water pours into
the center courtyard. The courtyard has three drain inlets - north, east
and west sides but the south sides has a low spot and it ponds and water
will get into the room from there - all wet carpet...

I think I need to put a drain inlet at this low spot (AND try to find a way
to minimize the runoff from the roof to the pool area) but I have no idea
where the existing drain line is. There are no plans.

Is there some sort of device that can detect pipe location beneath the brick
pavers and probably concrete slab below that? I need to know where the line
runs to know if I can punch a hole and install a new inlet near the line.

Thanks,

MC