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Division 22 | Plumbing

Commercial & Industrial Plumbing.

The region's most capable plumbing team. From high-volume retail rollouts and multi-family developments to complex medical gas systems.

Workforce

100%

Self-Performed

Experience

40YRS

Division Leadership

Bonding

Unlimited Capacity

License

CR-37

AZ ROC #317290

Technical Scope

Commercial Construction

Ground-up hotels, multi-family developments, and retail shells. High-volume rough-in capabilities for aggressive commercial schedules.

  • Hotels
  • Multi-Family
  • Retail Shells

Restaurant Infrastructure

Grease interceptors, high-capacity water systems, and kitchen rough-ins. Built for QSR rollouts like Starbucks, Firehouse, and national chains.

  • Grease Interceptors
  • Kitchen Rough-Ins
  • High-Capacity Water

Medical Gas Systems

NFPA 99 certified installers for dental offices, medical clinics, and laboratory facilities requiring oxygen, nitrous, and vacuum systems.

  • NFPA 99 Certified
  • Dental & Medical
  • Vacuum Systems

Underground Utilities

Complete sewer mains, storm drains, and lift station infrastructure from excavation to final connection and testing.

  • Sewer Mains
  • Storm Drains
  • Lift Stations

Industrial Piping

Process piping and compressed air systems for manufacturing environments. Welded, grooved, and fusion systems.

  • Process Piping
  • Compressed Air
  • HDPE Fusion

Backflow & Service

Certified testing, repair, and installation of backflow prevention assemblies. 24/7 emergency response for commercial clients.

  • Certified Testing
  • Repairs
  • 24/7 Emergency
Our Process

Plan to Pressure Test

Every project follows a controlled sequence — from initial coordination through final testing. No hand-offs, no gaps.

01

Takeoff & Coordination

Detailed material takeoff, shop drawing review, and clash detection before a single pipe ships to site.

02

Prefabrication

Riser assemblies, bathroom groups, and rack systems built in-shop for faster field installation and zero waste.

03

Field Execution

Underground, rough-in, and top-out performed by our own crews. One chain of command from excavation to trim.

04

Test & Commission

Pressure testing, backflow certification, and final inspection — all handled in-house before turnover.

Command Structure

Division Leadership

With 40+ years of experience, Greg has managed plumbing systems for every major builder in Southern Arizona. From hotel rollouts to retail shells, he optimizes the plan before we break ground.

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Greg Williamson, Plumbing Division Manager at ITDG Construction

Plumbing Division Manager

Greg Williamson

EMAIL: greg@itdgconstruction.com

DIRECT: (520) 444-6985

ACTIVE
40+ YRS EXPERIENCE
Owned Earth & Iron

We own the excavators, fusion machines, and trenching equipment other plumbing contractors have to rent. That means same-day mobilization and zero schedule dependencies on third-party vendors.

Full civil capability — excavation through final connection & testing

Excavators

Deep Trenching

Fusion Machines

HDPE Fusion

ProPress/MegaPress

Rapid Connections

Jetters

Line Clearing

Safety Protocol

OSHA Competent Persons

Trench work is inherently hazardous. Our certified crews follow strict protocols to ensure zero cave-in incidents.

Strict Trench Box / Shoring Protocols
Confined Space Entry Certified
Daily Soil Analysis
Competent Person On-Site (All Excavations)
Egress Ladders Every 25 Feet
Atmospheric Testing for Utility Work

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Technical Brief

Tucson Commercial Plumbing — In-House

ITDG holds an Arizona CR-37 plumbing license and operates as a full-service commercial plumbing contractor Tucson with W-2 plumbers on staff — not subcontracted labor. Our in-house plumbing division handles the complete commercial scope: ground-up new construction, tenant improvements, medical gas systems, backflow prevention, and emergency service across Southern Arizona.

Why does in-house plumbing matter? Because underground is always on the critical path. When the plumbing contractor Arizona general contractors rely on is a subcontractor, one missed day underground delays every trade behind it. Our model eliminates that risk entirely. As a licensed plumber Tucson project managers trust, we control the schedule from slab to fixture — no excuses, no finger-pointing between trades.

From Underground to Final Fixture

Most plumbing contractors handle one phase and hand off the rest. Our crews execute the full lifecycle: commercial plumbing installation from underground rough-in, top-out, and trim through final pressure testing and inspection. Every phase is performed by ITDG employees under a single chain of command, which means zero handoff delays and direct accountability at every stage.

All excavation work follows strict OSHA-compliant trench safety protocols — competent persons on every dig, shoring on every trench. Because our plumbing team works alongside our electrical and HVAC crews on the same projects, we eliminate the inter-trade coordination failures that plague multi-sub jobs. As an plumbing contractor Arizona building owners count on, we also provide emergency plumbing commercial response and maintain a fleet of underground plumbing contractor equipment ready to mobilize same-day.

AZ ROC #317290 (CR-37)
OSHA 30 Certified
NFPA 99 Med-Gas Certified
Backflow Certified
Engage Division

Request Plumbing Support

Whether you're an owner, GC, or engineer—our plumbing division is ready to deploy. Get a capability statement or discuss your project scope.

No obligation. We'll scope your project and provide a detailed proposal.

AZ ROC CR-37 Licensed
Prefab Capability
No Sub Markups