Builders use many techniques to run pipe through concrete block walls but the easiest and most efficient way is to use a core drill.
Water line through concrete wall.
Once the builder constructs the rough frame of the house the plumber installs the water supply lines.
You must stub out toilets water lines and electrical conduit as well as main utility lines that enter the building from below the foundation and rise up into the building.
That is because when the water line conduit sewer pipe or other penetration was installed a hole was drilled all the way through the wall.
Lines that supply water to the fixtures run above grade through stud walls.
Many times shifting soil or a house settling can create a gap around the pipe and an escape route for water before it reaches the foundation drain pipe.
All penetrations through a concrete foundation can leak water.
Water leaks around conduit pipes water lines and penetrations in concrete walls.
These lines are narrower and made from copper or polyvinyl chloride pvc.
Long used in radiant heating systems flexible pex tubing is perfect for water supply lines because it s easy to run through walls and floors and simple to work with.
When pipes pass through basement walls underground ground water can leak in around the pipes and through the concrete.
Pex tubing is an easy to install alternative to copper pipe.
You can stub out pipes in a concrete slab easily because the stub out is put in place before the final grade for the concrete slab is prepared but you must be very skilled.
I have dug out the outside and re tared the opening but still get water coming in.