Sub-Rough Plumbing
Utah Sub-Rough Plumbing pricing. These are the buried pipes under your slab. This scope includes waste lines, water service, and tie-ins to sewer or septic.
What’s Included
This scope includes installation of all below-slab plumbing drains and waste lines, water service piping from meter to house, and connection of main drain out to sewer or septic stub. Includes trenches, bedding, piping, cleanouts, and pressure/leak testing. Does not include finish plumbing fixtures, gas lines, or backfill/gravel.
Notes:
includes groundworks, under-slab, pressure lines, DWV, hose bibbs, shower blocking, test setup
Builder Tips:
Provide a final foundation and basement layout to avoid guesswork in drain locations.
Request clear separation of labor and materials if pricing varies.
Ask if trenching or gravel base is included — this can overlap with excavation or flatwork scopes.
Ensure plumber stubs out water and sewer connections above slab for mechanical tie-in later.
If you’re on septic, verify stub height and tank connection plan before inspection.
Real World Example:
A 3,200 sq ft home with 2.5 bathrooms, kitchen, and laundry:
Drain & waste lines under slab: $2,500–$3,800
Water main from meter: $1,000–$1,500
Sewer lateral tie-in: $1,000–$2,000
Total sub-rough plumbing: $4,500–$7,300
FAQ
Q: Does sub-rough include gas lines?
A: No, gas piping is typically part of the mechanical or HVAC bid.
Q: Do plumbers provide gravel or bedding?
A: Sometimes — ask if it’s included or coordinated with excavation or flatwork.
Q: Is this scope inspected?
A: Yes. Most cities require a pressure or flow test before backfill and concrete pour.
Q: What happens if the drain layout changes?
A: Any layout changes after the pour will require core drilling or trenching, costly and best avoided with clear plans.
Related Pricing Pages
septic-system-installation
