Plumbing, Gas and Specialty Piping Coordination

What the scope can include

Select the work and handoff your project needs. The agreement identifies the included deliverables and responsibilities.

• Water and sanitary systems

  Coordinate fixtures, demand, hot water, sanitary routing, vents and connection information. Include backflow and cross-connection review, interceptors and treatment interfaces where relevant to the use.

• Gas and specialized systems

  Collect gas loads, equipment requirements and routing constraints for responsible design. Coordinate medical, laboratory, process or other specialized systems with the appropriate professionals and equipment suppliers.

• Roof and equipment drainage

  Align roof drainage, overflow, condensate, equipment discharge and civil receiving systems. Identify which party designs and accepts each side of the connection.

Prepare for the assignment

You can start with incomplete records. Tell us what is available and what still needs to be established.

• Information to bring

  Proposed use, fixture and equipment schedules, existing records, utility data, floor/roof plans and any special discharge, process or gas requirements.

• The agreed handoff

  A coordinated plumbing/gas input register and agreed drawing package, with equipment, civil and utility interfaces and separate approvals identified.

Decisions, fees and timing

Scope and dependencies determine the proposal. No universal price or approval date is assumed.

1. Confirm the basis and responsibility

   Review the available records, intended endpoint and authority to use the information. Assign missing inputs, technical decisions and the parties who can authorize changes.

2. Coordinate and review the work

   Prepare the included documents from agreed inputs, resolve interfaces with responsible specialists and track revisions. Record external decisions and conditions separately from work prepared for review.

3. Account for project-specific dependencies

   Concealed piping, service capacity, equipment selection, treatment requirements and site access for investigation or phased connections.

4. Deliver the defined milestone

   Provide the controlling documents and remaining-action record. Identify what is accepted, what still requires a decision and what belongs to a separately contracted next stage.

On-site wastewater and septic permits

On-site sewage facilities (OSSFs) treat and dispose of wastewater at the property instead of relying on a public sewer connection. Septic permit coordination begins with the actual use, expected wastewater load, existing-system records and the authority for the site.

• Evaluate the site and selected system

  Provide the survey, soil/site evaluation if available, building/fixture program, water sources, drainage, easements and usable treatment/disposal area. Qualified specialists evaluate the site and prepare the applicable planning materials; increased use or a replacement system needs its own review. Texas TCEQ guidance distinguishes site evaluation, planning, installation and maintenance roles and directs applicants to the applicable local authority.

• Coordinate the building connection and handoff

  Align the building discharge with the specialist’s treatment/disposal design, elevations, pumping/power needs and access for service. The agreed output can include coordinated application exhibits, design interfaces and a responsibility/approval register. Installation, inspection, operation and maintenance are assigned separately. If public sewer service is being considered, use utility infrastructure below to investigate availability and capacity before assuming an existing septic system can be abandoned.

Domestic water, fixtures and drawing deliverables

A remodel, new building or equipment change can alter water demand and fixture connections. Start with the proposed operation, fixture schedule, equipment requirements and verified existing service information.

• Cold water, demand and available pressure

  Cold-water design coordinates supply, fixture and equipment demand, routing, isolation valves and the pressure needed at the served points. Bring utility/provider information, available pressure data, pipe records and proposed simultaneous uses. The responsible designer evaluates sizing and any regulation or boosting needs; an existing meter or pipe diameter does not establish adequate capacity. The agreed drawings identify retained and new piping, connection points and unresolved field verification.

• Hot water, water heaters and recirculation

  Hot-water demand depends on the actual fixtures, equipment, operating pattern and required delivery conditions. Water-heater selection also affects fuel or electrical supply, venting, drainage, access and support. Recirculation can return water through a distribution loop; its pump, controls, balancing and heat-loss effects need coordinated design. Collect manufacturer data and existing system information so the package can show the selected equipment, piping, controls and related mechanical/electrical interfaces.

• Fixture schedules, rough-ins and accessible layouts

  A fixture schedule identifies the selected fixtures, connection requirements and associated accessories. Coordinate locations and rough-ins—the connection locations prepared before fixtures are installed—with architectural dimensions, accessible clearances, wall supports and equipment layouts. Bring current floor plans and product data; a change in fixture model or counter layout can require revised supply, waste, support and accessibility details.

• Backflow and cross-connection interfaces

  A cross-connection can link potable water to a nonpotable source; backflow is reverse flow that can carry contamination into the supply. Identify irrigation, process equipment, treatment, hose and other affected connections for the responsible designer and water provider. Coordinate the specified protection, installation access and required testing records. Device selection and acceptance depend on the actual hazard and authority requirements, not just the presence of a device on an old drawing.

• Plans, risers, isometrics and calculations

  Plumbing plans show system locations on the building layout. A plumbing riser or isometric diagram explains connections and changes in level that a floor plan may not make clear. The agreed package can coordinate plans, fixture/equipment schedules, sizing calculations and details from the responsible design team. Match fixture IDs, pipe routes, elevations and revision dates across documents; permit drawings, contractor installation details and final record documents have different purposes.

Sanitary drainage, vents and equipment waste

Before relocating fixtures or adding equipment, establish where wastewater can go, the existing connection conditions and which discharge types need separate treatment or review.

• Drainage routes, fixture connections and elevations

  Sanitary drainage carries wastewater from the identified fixtures and equipment to the approved receiving system. Layout and elevation information determine whether proposed gravity routes can work through existing floors and structures. Obtain fixture loads, invert or connection elevations and known sewer conditions. Coordinate pipe routes, slopes and access with the designer and civil team; do not assume an existing connection has capacity or permission for a changed use.

• Venting, cleanouts and retained piping

  Drainage venting manages air movement and pressure relationships in the waste system; it is separate from room exhaust ventilation. Coordinate fixture branches, retained vents and roof terminations. Cleanouts provide maintenance access, so locate them with floors, walls, equipment and occupied spaces. The drawings should distinguish verified existing piping from concealed routes that still require investigation before reuse or connection.

• Indirect waste and floor drains

  Some equipment needs an indirect waste connection through an appropriate receptor and required separation rather than a direct sewer connection. Bring the equipment discharge, temperature, flow and installation instructions for the designer’s assessment. Floor drains also need coordinated floor levels, traps, maintenance access and receiving connections. Show the intended receptor and equipment relationship in the plans; a nearby drain is not evidence that every discharge can use it.

• Backwater protection and sewage ejectors

  Backwater protection addresses possible reverse flow in drainage piping; it differs from potable-water backflow protection. A sewage ejector pumps collected wastewater where the approved design cannot rely on gravity alone. The responsible team needs drainage elevations, receiving sewer conditions, expected flow and access information to evaluate the arrangement. Coordinate basin, pumps, controls, venting, power and service access, with testing and acceptance assigned to the appropriate contractor and specialists.

• Building plumbing and the site sewer

  Building plumbing documentation must agree with the site connection location, elevation and discharge criteria. Civil and utility work may address off-building lines, capacity and provider approvals separately. Identify the owner of each design segment, the connection detail and the approving party. Use the utility-infrastructure and civil-site services below when the assignment extends beyond the building system.

Primary and overflow roof drainage

Roof modifications, new equipment and additions can change how water reaches drains and where it discharges. Coordinate the roof geometry and building structure with the plumbing and site receiving systems.

• Roof drains, leaders, scuppers and overflow

  Primary roof drainage handles the intended routine drainage path. Overflow or secondary drainage addresses the separately designed backup path under applicable criteria. Roof drains collect water, leaders convey it vertically, and scuppers discharge through a roof-edge or parapet opening. Bring roof areas, slopes, elevations, parapets, existing pipe data and proposed changes. The responsible designers establish capacities and coordinate overflow levels with structural water-loading and exterior discharge conditions.

• Retained systems and site discharge

  For storm-plumbing alterations, verify retained drain and pipe conditions and identify the changed roof contribution. Coordinate routes, penetrations, supports and discharge points with architectural, structural and civil drawings. The output can include a roof-drainage plan, piping/riser details and the agreed calculations and connection record. Building storm piping does not replace a site hydrology, drainage or detention study; resolve the receiving system through the responsible civil and authority review.

Fuel-gas loads, piping and utility handoffs

Adding or replacing gas equipment can change demand, pressure and venting needs. Confirm the fuel, provider, equipment and existing installation before defining the drawing and permit package.

• Gas-load calculation and piping design inputs

  A gas-load calculation reconciles the connected equipment demand with the intended operating basis. Supply equipment input ratings, gas type, pressure requirements, meter/service information and proposed route lengths and elevations. The responsible designer evaluates routing, sizing and allowable pressure conditions. Coordinate shutoff locations, equipment access and protection with architectural and installation requirements; a pipe drawn to an appliance is not a completed capacity evaluation.

• Meters, combustion air and venting

  Meter changes or relocation need the provider’s service requirements and approval of its work boundary. Appliance venting and combustion air must be coordinated with the selected equipment, rooms, roof/wall terminations and mechanical design. Document which party supplies the meter, regulator, building piping and equipment connections. Carry approved provider and equipment changes into the gas plans and affected mechanical/electrical sheets.

• Permit, installation and testing records

  Identify the responsible trade applicant, required professional documents, inspection sequence and provider release conditions for the jurisdiction. The qualified contractor performs its installation and assigned tests; the responsible authority or specialist accepts the required evidence. True North can coordinate the agreed application, drawing revisions and test/inspection records. Design coordination, trade permits, field testing and utility activation are separate obligations, defined in the proposal.

Food-service grease waste and interceptors

Menu, preparation methods and actual equipment determine which waste streams need review. Coordinate this plumbing scope with kitchen ventilation, but keep grease-water handling separate from hood exhaust.

• Grease interceptor and grease-trap coordination

  Grease traps and interceptors are labels used for devices that separate grease-bearing wastewater; the actual type, capacity, installation and acceptance criteria must be established. Bring sinks, dishwashing and other equipment schedules, flows, menu/operations, existing device records and available maintenance access. The responsible plumbing designer and receiving utility determine the suitable arrangement. A small under-sink device cannot be assumed interchangeable with an exterior interceptor.

• Grease piping, access and approval records

  The coordinated package identifies connected fixtures, grease-waste routes, venting, interceptor location, access for cleaning and the approved sewer connection. Coordinate exterior devices with civil elevations, traffic/loading conditions and site restoration where relevant. Record utility/health review, installation inspection and operating-maintenance responsibilities separately. Changing the menu, equipment or tenant may require a fresh review of the existing arrangement rather than simply reusing its old approval.

Specialty piping follows the actual operation

Identify the substance, process, equipment and receiving system at intake. Specialized waste, medical systems and process utilities need their own technical criteria and qualified responsibilities, even when they share a building with ordinary plumbing.

• Oil, sediment and wastewater pretreatment

  Oil/sediment separation addresses the actual wastewater from uses such as vehicle or equipment work. Food-service grease equipment is not automatically suitable. Wastewater pretreatment can involve characterization, separation or treatment before discharge to the receiving utility. Bring process descriptions, expected flows, contaminants and existing discharge records. Qualified environmental and plumbing specialists coordinate equipment with the utility’s applicable conditions. They also coordinate access for sampling and maintenance. Ordinary sewer availability does not establish permission for an industrial discharge.

• Laboratory and process waste

  Laboratory/process waste design starts with the chemicals and processes that generate it, including concentration, temperature and discharge pattern. The responsible specialists evaluate material compatibility, segregation, venting and any required treatment or controlled collection. Coordinate equipment outlets, drains, neutralization/treatment space and approved disposal interfaces. Do not route a laboratory waste stream into domestic drainage merely because both appear on the same floor plan.

• Process water and treatment equipment

  Process water may need a specified quality, temperature, flow or pressure beyond ordinary fixture supply. Collect production-equipment and water-quality requirements, then coordinate isolation, compatible piping and the treatment specialist’s design. Filtration, softening or disinfection equipment also needs drains, bypasses, replacement/service space and power or control interfaces. Document the required verification and operating responsibilities; installing a treatment device alone does not establish the required water quality.

• Compressed air and vacuum

  Compressed air design depends on actual equipment demand, required pressure and air quality, with compressor, receiver, treatment, condensate and distribution interfaces. A vacuum system instead needs its intended use, demand, equipment and collection/exhaust criteria. Bring manufacturer data and operating patterns so the specialist can establish a compatible system and the drawings can coordinate power, controls and access. Medical vacuum and medical air require their healthcare-specific design and verification path.

• Medical-gas plans and specialist verification

  Medical-gas work begins with the facility’s clinical functions, gas types, outlet schedule and responsible healthcare-system designer. Coordinate source equipment, distribution, outlets, alarms, shutoffs and architectural/mechanical/electrical interfaces according to the applicable facility requirements. Identify qualified design, installation, inspection and verification roles and collect the required acceptance records before service. Document coordination does not establish medical-gas credentials or replace the specialist’s certification.

• Beverage CO2 systems

  A beverage carbon-dioxide (CO2) system serves beverage equipment and has different operating and safety interfaces from fuel gas or medical gas. Bring cylinder/bulk-supply information, consumption, supplier instructions and the equipment/room layout. Coordinate supply location, piping, monitoring, ventilation and applicable fire/building review with qualified specialists. The package should identify installation, test, supplier and owner responsibilities rather than treating CO2 as an ordinary water connection.

• Reclaimed water and rainwater systems

  Reclaimed-water and rainwater proposals need a defined source and intended end use. Coordinate collection or provider supply, storage, treatment, identification, separation from potable water, overflow and cross-connection protection. Bring source quality, demand, available space and authority/provider criteria. The responsible team determines accepted uses and verification; a reuse label does not make water suitable for drinking or every building application.

• Testing, verification and the final handoff

  Agree the required pressure/leakage tests, flushing or disinfection records, water-quality checks and specialty verification with the responsible providers and authorities. Keep installer results, independent specialist verification where required, correction records and accepted final drawings traceable to the correct system. Installation, testing, commissioning and unlimited redesign are not automatically included in drawing coordination; the proposal identifies the agreed services and the remaining owner obligations.

Before you begin

Common questions