Single-story house with a concrete slab with a raised floor built in the 60s and 70s. Where are the water and sewage pipes usually located? Between the floor and the concrete slab or embedded in the slab?
No, for the most part, prisolrör run under the floor. It's only where the incoming water is that it's embedded in the slab. However, the drainage pipes are usually embedded in the slab, and therefore you can only replace the floor drain and other various small pipes.
I believe it is difficult to speak of a uniform execution. My own recollection is that the sewer pipes were mostly laid under the slab, primarily in the form of concrete pipes. Cold water used to come in from below to a sheet metal-covered well. Internal piping probably took place usually above the slab and possibly above the floor. In the early '70s, there was a material shift, from concrete/cast iron to plastic variants for sewage and from cast iron to PEM pipes for incoming cold water. In the '60s, most houses were built with basements.