On a tilt-up or slab-on-grade building, the plumbing underground goes in before the slab and is buried for the life of the building. Mistakes here are concrete-saw mistakes. Three we see most.
Sleeves through the wrong footing
The plumbing drawings show the pipe; the structural drawings show the footings and grade beams. If nobody overlays the two, the pipe hits a grade beam and someone is core-drilling structural concrete. We overlay them at takeoff.
Floor sinks where the equipment is not
Restaurant and lab floor sinks are placed from the equipment plan, which changes. We confirm the final equipment layout with the GC before trenching, in writing.
Testing after backfill
Testing an underground line after it is covered means digging it up if it fails. We test with the trench open, photograph the gauge with the inspector, and backfill after.
None of these take extra time. All of them take a foreman who reads the whole set and a company that insists on it.
Medical gas verification: what to expect and why it fails
The independent verification is the last gate on a medical gas system. Here is what the verifier tests, what fails most often, and how we have kept corrections at zero.
Grease interceptor sizing: why the health inspector and the plumbing inspector disagree
Restaurant owners get caught between two codes. Here is how sizing actually works in East Valley jurisdictions and what to decide before the slab is poured.
Five reasons a new hydronic system does not perform, none of them the chiller
When a brand-new chilled water plant will not hold temperature, the chiller is almost never the problem. The piping usually is.
Send the drawings or describe the building.
A project manager or Carol replies the same business day. Contract clients on the 24-hour line get a plumber, not a service.