Jack hammer or Bob cat depending on the location and what size / type of piping
You will have to remove the concrete above and around the leaking pipe. All or some of the pipe may need to be replaced. If your house was new in the early 1980s, the PVC pipe that was used has been found to be generally faulty.ANS 2 - FIRST - make sure it IS under the concrete. In my experience this hardly ever happens unless the foundation has cracked, or building settled considerably.
Plumbers black pipe sealant by Hercules chemical corporation.
A concrete mixture of sand, cement, and small gravel is used to make the concrete from which the tubular concrete pipe is made. The pipe is made of concrete.
What is above your ceiling. Chances are it is a leaking pipe (probably a waste pipe-ick) or condensation from around your air ducts. Is this a house? Leaking on 1st level or a basement? Is it a "drop" ceiling?
With a light solution of hydrochloric acid and water, let the solution soak in the concrete for a few minutes and then rinse it off.
The alternator oil pipe on combo van leaking does feed the vacuum and the return pipe.
What's under the intake is not a hose, it's a pipe which a hose attaches to behind the intake manifold near the firewall. If the hose is leaking, it's a relatively easy task to replace it. If the pipe is leaking, you will have to remove the intake manifold which is not an easy task (minimum 6 hours to remove and replace the manifold!)
Bad fill pipe?
When repairing a leaking pipe, you need a plastic tube that is not leaking and with a mouth a little larger than the pipe you are replacing. No specific kind of tubing would be preferable over another type.
James Hartwell has written: 'Findings of petrographic investigations of embedded cylinder prestressed concrete pipe' -- subject(s): Concrete Pipe, Evaluation, Petrofabric analysis, Pipe, Concrete, Tendons (Prestressed concrete), Testing
Yes, it can come in contact with concrete.
If it is leaking when you use the shower, not shutting off completely, it will need to be replaced. If it is leaking at the wall, take it off and reseal the thread on the pipe with either pipe dope or Teflon tape and reinstall.