PLUMBING SERVICES
Sanitary & Waste Systems
Drainage, waste, and vent piping production support developed from your engineer’s fixture layout and
system design.
Our Founding and Mission
Introduction
NexMEP Global LLC supports U.S. MEP consulting firms with sanitary and waste system production, translating fixture layouts, drainage strategy, and venting design developed by your engineering team into fully coordinated piping plans, riser diagrams, and schedules. Our team carries drainage, waste, and vent piping layout through each design phase while your licensed engineers retain full authority over system topology, pipe material selection, and venting strategy.
We work from the fixture layout, invert elevation data, and venting narrative your engineer provides, producing drawings that reflect that design intent accurately. Every sanitary and waste plan we deliver is built to be reviewed, redlined, and stamped by your engineer of record.
DESIGN ACCURACY & COMPLIANCE
Why This Service Matters
Sanitary and waste piping relies on gravity flow, which means slope, invert elevation, and routing sequence must be coordinated correctly from the first fixture connection all the way to the building’s point of discharge. Unlike pressurized systems, a sanitary drainage error is rarely fixable with a simple pipe re-route — it often requires reworking floor elevations, structural penetrations, or slab depressions, making accuracy at the design stage especially important.
Because sanitary and waste layouts must be coordinated with structural floor and foundation design from early in the project, and because vent routing competes for the same shaft and roof penetration space as other systems, this scope benefits from dedicated production attention throughout every design phase.
Our Capabilities
Drainage & Vent Routing
Gravity drainage layouts and vent stack designs accounting for slope and invert elevation continuity.
Waste & Vent Risers
Stack plumbing designs maintaining consistent floor-to-floor riser alignment across multi-story buildings.
Commercial Kitchen Systems
Grease waste piping layouts and interceptor sizing coordination for food service facilities.
Floor Drain & Cleanout Plans
Detailed cleanout, floor drain, and floor sink placement documentation.
Below-Grade Sump Systems
Sump pit and sewage ejector layout coordination aligned with structural slab designs.
Renovation & Tie-In Support
Thorough documentation of existing drainage infrastructure prior to mapping new fixture tie-ins.
Calculations
Engineering Calculations
Calculation methodology built for accurate, traceable HVAC equipment sizing.
Pipe Sizing & Slope Verification
Drainage Fixture Unit (DFU) pipe sizing and horizontal slope verification ensuring self-scouring velocity.
Vent Sizing & Grease Interceptors
Vent sizing based on engineering methodology and grease interceptor load coordination.
Calculations
Systems We Support
Ventilation-related calculation support includes outdoor air rate compilation.
Gravity Drainage Systems
Conventional sanitary drainage networks for commercial and residential sites.
Indirect Waste Piping
Air gap and air break discharge lines for mechanical and food equipment.
Commercial Grease Waste
Dedicated grease collection piping and exterior/interior interceptors.
Sump & Ejector Systems
Lift stations and sewage ejectors for below-grade drainage.
Venting Methods
Individual, common, wet, and Air Admittance Valve (AAV) venting layouts.
Structural Pit Integrations
Sub-grade ejector basin layouts coordinated with footing constraints.
Our production capabilities support complex gravity-flow environments, ensuring slope preservation and precise structural alignment across all building types.
Calculations
Software, Workflow & Coordination
Rigorous backup calculations formatted directly for permit submission and QA/QC documentation.
Software & Production Workflow
Modeled in Revit MEP using your firm’s system families and sloped piping parameters. Workflow features an active invert elevation log, allowing continuous slope tracking across runs without re-deriving elevations at each iteration.
Revit & AutoCAD Coordination
Sanitary piping is cross-checked against beams, slab penetrations, ducts, and conduit using Navisworks clash passes. Roof penetrations for vents are coordinated against architectural roof plans and storm drainage lines to prevent clustered penetrations.
Calculations
Systems We Support
Expertise across diverse equipment lines, hybrid configurations, and complex Electrical setups.
Sanitary Floor Plans
Riser Diagrams
Invert Elevation Summaries
Schedules & Calculations
Need Uncompromising Gravity Drainage Production Support?
Partner with NexMEP Global LLC for clash-free sloped piping models, riser schematics, and invert elevation logs.
Our Core Philosophy
Typical Project Types
Commercial & Office
Workspaces, corporate headquarters, and multi-story office buildings.
Multi-Family & Residential
Apartment complexes, mixed-use towers, and multi-unit living spaces.
Restaurants & Hospitality
Commercial kitchens, dining venues, hotels, and entertainment hubs.
Healthcare & Education
K-12 schools, higher education campuses, and outpatient clinics.
Calculations
QA/QC Process
A rigorous, multi-tiered review structure ensuring accurate, clear, and error-free submittals.
Slope & Invert Audits
Auditing gravity lines for continuous slope and invert elevation alignment across sheets.
Structural & Architectural Audits
Verifying underground and above-ceiling pipe clearances against structural slab depressions.
Continuous Line Tracing
Secondary QA reviews independently tracing each riser from top fixture to main point of discharge.
Why NexMEP Global LLC?
NexMEP Global LLC brings a dedicated production team with practical experience across standard and specialty ventilation systems, a consistent U.S. code and standards focus, and a multi-level QA/QC process that reduces rework during your engineer’s review cycle.