Quote:
Originally Posted by jyl
Will these systems, or at least the part embedded in the floor, last for 100 years?
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Yes.
The only caveat is that the penetration point (where the piping enters the slab) needs to be protected against moisture infiltration/capillary action or wicking, otherwise it becomes a potential failure point for the concrete to break up over time.
Use steel piping - not PVC in concrete, especially when you're dealing with temperature variations. The coefficients of expansion between steel and concrete are very, very close (one of the reasons steel reinforcing bars work so well).
As long as concrete is properly detailed and the appropriate moisture barriers are provided it should last indefinitely - with or without piping/steel inside.