Plumbing engineering designs the water, sanitary, and gas systems that supply and drain commercial buildings — from domestic water service sizing through fixture connections, sanitary drainage, grease interceptors, gas piping, and specialty systems for medical and laboratory facilities. Apex Grid plumbing engineers produce PE-stamped permit drawings for commercial, restaurant, medical, and multifamily projects.
Request Engineering SupportCommercial plumbing engineering covers the design of all piping systems that convey water, waste, and gas inside buildings: domestic hot and cold water supply, sanitary drainage and venting, storm drainage, gas piping, and specialty systems like medical gas and process piping. Commercial plumbing is significantly more complex than residential plumbing because of the variety of fixture types, occupancy loads, code requirements, and specialty systems involved. Apex Grid plumbing engineers coordinate with mechanical and electrical engineering to produce complete MEP permit packages.
Commercial plumbing engineering designs the water supply, sanitary drainage, venting, and gas systems for commercial bui…
Grease interceptors separate and trap grease, fats, and oils from commercial kitchen waste before it enters the sanitary…
Medical gas systems — oxygen, vacuum, nitrous oxide, compressed air, and carbon dioxide — are life safety systems in hea…
Plumbing riser diagrams are required by most building departments for multi-story commercial and multifamily buildings —…
Commercial gas piping engineering sizes the gas distribution system to supply the required BTU capacity to all gas-fired…
Domestic water system engineering designs the supply, distribution, and hot water systems that deliver potable water thr…
Fire suppression systems share the building water service with domestic plumbing — and the combined demand affects servi…
Apex Grid Engineering is licensed in 49 states — every U.S. state except Alaska. Engineering stamping and licensure are confirmed for each project jurisdiction. We provide plumbing engineering as a standalone service or as part of a coordinated multi-discipline package.
We work from architectural PDFs, contractor sketches, or existing CAD files and produce stamped engineering documents and permit packages that building departments accept. One business day turnaround on fee proposals.
Get a ProposalSend us your drawings or describe your project — we respond with a fee proposal within one business day.
Contact Us 480-490-0064Reviewed and sealed by licensed PEs. “Solid engineering and clear communication from start to finish.” — Jason Mitchell, Principal Architect
Tell us what you need and where the project is — quotes back within 12–24 hours on qualifying scopes.