# Cast-Iron Drain Replacement Under a Preston Hollow Slab: What Homeowners Should Compare
Rubric Plumbing is an owner-operated plumbing company based in Plano, Texas. We serve North Dallas neighborhoods including Preston Hollow and Highland Park, along with Plano, Richardson, Carrollton, North Irving and Las Colinas (Hackberry Creek), Southlake, and Grapevine. Cast iron replacement and under-slab tunneling are among the services listed on our site.
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Older Preston Hollow homes often still have cast iron drains beneath the slab. When those lines crack or scale up, homeowners usually weigh under-slab tunneling against opening finished floors. Tunneling can help protect hardwood and tile when site conditions allow. Before you hire anyone, ask for a written scope that covers camera findings, access points, how bathrooms and the kitchen stay usable in an occupied home, cleanup and restoration, and any installation warranty language—in writing.
# Questions that belong in the written scope
- What did the camera inspection show under the slab, and which sections need replacement?
- Does tunneling fit this foundation and soil, or is open-floor access required in places?
- How will bathrooms, kitchen sinks, and laundry drains be managed during the job?
- Who protects flooring, HVAC returns, and finished rooms while work is underway?
- What cleanup and restoration are included versus separate contractor or homeowner work?
This is general homeowner guidance, not a scope for every house. An on-site assessment still decides what your slab and piping allow.
# Services listed on our main site
Cast iron replacement and under-slab tunneling; luxury fixtures and remodel plumbing; custom showers and steam; everyday repairs; emergency plumbing; water heaters; pipe repair and replacement; sewer line services; gas line services; slab leak repair; drain camera inspection; water filtration and pressure solutions.
Rubric Plumbing · 3316 Claymore Dr, Plano, TX 75075 · (214) 288-2803 · https://rubricplumbing.com · Mon–Sun 7 AM–9 PM
By the Rubric Plumbing team (owner Paladio “PJ” Garza).
More at https://rubricplumbing.com