Home Plans
- Floor plans
- Foundation plan
- Plumbing plan when available
- Roof plan when vents or equipment are involved
- Mechanical-room layout
- Addition or detached-building plans
- Relevant structural details
- Current revisions
RESIDENTIAL NEW CONSTRUCTION
Residential Plumbing Planned as One Complete Construction Package
NexGen supports custom homes and residential construction with plan review, underground plumbing, water and drain systems, rough-in and top-out work, gas piping, water-heater planning, fixture coordination, final connections, testing, and documented scope responsibilities.
PROJECT INFORMATION
The plumbing estimate should reflect the actual home, fixtures, equipment, and responsibility boundaries
Fixture Selections
- Toilets
- Lavatories
- Faucets
- Tubs
- Shower valves and outlets
- Kitchen sinks
- Disposers
- Laundry fixtures
- Exterior fixtures
- Specialty plumbing products
Equipment and Appliances
- Water heater
- Tankless system
- Recirculation
- Water treatment
- Gas range
- Gas dryer
- Fireplace connection
- Outdoor kitchen
- Other approved plumbing equipment
Responsibility Information
- Who purchases fixtures
- Who purchases equipment
- Who provides excavation
- Who provides concrete work
- Who coordinates permits
- Who schedules inspections
- Who provides power and ventilation
- Who completes finish restoration
Allowances and preliminary selections should be labeled clearly so they are not mistaken for final product requirements.
FROM FOUNDATION TO FINAL
The home’s plumbing is completed through connected construction phases
Plan and Layout Review
Review the home layout, fixture locations, equipment, hot-water needs, gas appliances, foundation conditions, project schedule, and scope responsibilities.
Underground Plumbing
Install approved building drains, fixture branches, sleeves, penetrations, water-service entries, and other below-slab or below-grade plumbing before cover.
Rough-In and Top-Out
Install approved water, drain, waste, vent, gas, valve, and fixture connection locations while framing and required access remain open.
Trim and Equipment Connections
Connect approved fixtures and equipment after cabinets, countertops, finished surfaces, power, ventilation, and products are ready.
Testing and Closeout
Test accessible completed plumbing work as conditions allow, address approved punch-list work, and document remaining limitations or responsibilities.
BEFORE CONCRETE
Under-slab plumbing depends on elevations, footings, fixture locations, and the construction schedule
Drainage Layout
- Fixture branch locations
- Main building drain
- Required slope
- Cleanouts
- Invert elevations
- Connection point
- Future access
- Testing before cover
Foundation Conditions
- Footings
- Grade beams
- Thickened slabs
- Post-tension restrictions when applicable
- Sleeves
- Penetrations
- Finished floor elevations
- Structural revisions
Site Responsibilities
- Excavation
- Trench access
- Soil and groundwater conditions
- Rock
- Backfill
- Compaction
- Concrete schedule
- Protection of completed work
- Utility coordination
WHILE THE FRAMING IS OPEN
Residential rough-in locations must match the final fixtures and finished dimensions
Water Piping
- Main distribution
- Fixture branches
- Shutoffs
- Exterior fixtures
- Equipment connections
- Hot-water routing
- Recirculation when included
- Pressure and expansion considerations
Drain, Waste, and Vent
- Fixture drains
- Traps and branches
- Stacks
- Vent routing
- Roof penetrations
- Cleanouts
- Laundry drainage
- Mechanical-room drainage
Valves and Concealed Components
- Shower valves
- Diverters
- Tub fillers
- In-wall carriers
- Wall-mounted faucets
- Specialty fixtures
- Equipment valves
- Accessible service points
Framing and Finish Coordination
- Stud locations
- Blocking
- Cabinet dimensions
- Countertop thickness
- Finished floor height
- Finished wall thickness
- Tub and shower systems
- Required access panels
Final product specifications should be available before concealed rough-in positions are treated as complete.
PRODUCT DECISIONS
Fixtures that look similar can require different plumbing preparation
Standard Fixtures
- Toilets
- Lavatories
- Kitchen sinks
- Laundry sinks
- Tubs
- Standard showers
- Hose connections
- Appliance water connections
Specialty Fixtures
- Wall-mounted toilets
- Freestanding tubs
- Wall-mounted faucets
- Multiple shower outlets
- Body sprays
- Curbless shower drains
- Pot fillers
- Specialty floor drains
- Bidet-style fixtures
Equipment
- Storage water heaters
- Tankless water heaters
- Recirculation systems
- Water softeners
- Filtration equipment
- Well or pressure equipment when applicable
- Pumps
- Other approved plumbing equipment
Model numbers and manufacturer specifications should be reviewed before rough-in, not after walls and finishes are complete.
SUPPORTING THE FINISHED HOME
The home’s fixtures and appliances must be supported by the connected systems
Hot-Water Demand
Bathroom count, tub size, shower outlets, occupancy, simultaneous use, laundry, kitchen demand, piping distance, and recirculation expectations affect water-heater planning.
Water Distribution
Available pressure, service size, pipe sizing, material, branch layout, fixture demand, shutoffs, treatment equipment, and future access affect water delivery.
Gas Distribution
Final appliance models, input requirements, pipe length, available capacity, regulators, shutoffs, equipment locations, testing, and ventilation coordination affect the gas scope.
Final equipment decisions should be reviewed against the utilities and piping systems intended to support them.
CLEAR PROJECT OWNERSHIP
Residential construction moves more smoothly when responsibilities are assigned before each phase
NexGen Plumbing Scope
- Review approved project information
- Define plumbing inclusions and exclusions
- Complete approved plumbing phases
- Coordinate required plumbing access
- Test accessible completed work
- Document changes and limitations
- Complete approved final connections
Builder or General Contractor
- Control the overall schedule
- Provide site access
- Coordinate other trades
- Distribute current plans
- Prevent premature cover
- Schedule required reviews
- Identify the approval contact
- Communicate project changes
Owner, Designer, and Suppliers
- Approve the final layout
- Provide fixture selections
- Provide equipment selections
- Provide current specifications
- Confirm finish dimensions
- Approve substitutions
- Confirm owner-furnished products
- Review budget changes
NexGen does not assume design, purchasing, scheduling, or trade responsibilities that are not specifically included in writing.
WHEN SELECTIONS CHANGE
Allowances and substitutions should be reconciled before they affect concealed plumbing
Changes That May Affect Plumbing
- Toilet type
- Tub type
- Shower-valve system
- Number of shower outlets
- Vanity layout
- Sink type
- Faucet type
- Appliance model
- Water-heater type
- Gas-appliance input
- Cabinet dimensions
- Finished floor or wall thickness
How Changes Should Be Handled
- Provide the revised specification
- Compare it with the approved scope
- Identify rough-in changes
- Identify material changes
- Identify schedule impact
- Identify work already completed
- Provide additional pricing when needed
- Obtain approval before changing the work
A fixture allowance controls budget only. It does not provide the technical information required to rough in the plumbing.
YOUR RESIDENTIAL PROJECT
What happens after you contact us
- 01
Share the home plans and project schedule
Provide the current layout, foundation information, fixture schedule, equipment information, builder contact, requested pricing date, and known construction dates.
- 02
Review plumbing responsibilities
Confirm fixture purchasing, equipment purchasing, excavation, concrete, permits, inspections, gas work, testing, access, and finish responsibilities.
- 03
Prepare the residential plumbing scope
NexGen organizes the proposal around the available plans, fixture and equipment information, construction phases, known conditions, and stated exclusions.
- 04
Resolve product and layout questions
Missing fixture specifications, equipment selections, finished dimensions, structural conflicts, and responsibility questions should be addressed before affected work begins.
- 05
Complete underground plumbing
Approved underground work is installed, tested, documented, and prepared for cover as project conditions allow.
- 06
Complete rough-in and top-out
Approved water, drain, vent, gas, valve, fixture, and equipment locations are installed while framing and required access remain available.
- 07
Coordinate the final connection stage
The builder confirms that cabinets, countertops, finishes, utilities, fixtures, equipment, and access are ready.
- 08
Complete approved fixture and equipment connections
NexGen connects the approved plumbing fixtures and equipment included in the written scope.
- 09
Test and close out the plumbing package
Accessible completed work is tested as conditions allow, approved punch-list items are addressed, and remaining limitations are documented.
Information that can help us prepare
- Project address
- Builder or general contractor
- Owner contact
- Current floor plans
- Foundation plan
- Plumbing plan when available
- Fixture schedule
- Final fixture model numbers
- Water-heater selection
- Recirculation information
- Water-treatment equipment
- Gas-appliance schedule
- Cabinet plans
- Countertop information
- Finished floor information
- Shower and tub specifications
- Project start date
- Underground date
- Slab date
- Framing date
- Rough-in date
- Inspection responsibilities
- Fixture-delivery date
- Final connection date
- Excavation responsibility
- Concrete responsibility
- Fixture-purchasing responsibility
- Equipment-purchasing responsibility
- Change-approval process
QUESTIONS
Helpful answers before residential construction begins
Does NexGen provide complete plumbing for custom homes?
NexGen can provide an approved residential plumbing package that includes plan review, underground work, water piping, drainage, venting, gas piping, rough-in, top-out, fixture connections, equipment connections, testing, and documented closeout responsibilities.
When should NexGen receive the plans?
Plans should be provided before underground and rough-in dates are fixed. Early review allows missing fixture information, equipment requirements, foundation conflicts, and responsibility questions to be identified.
Are fixture selections needed before pricing?
An early estimate may use allowances or preliminary information, but final pricing and rough-in locations may change when the actual products require different drains, valves, supports, supplies, gas connections, or access.
Is rough-in included in residential new construction plumbing?
Rough-in and top-out are central phases of the residential plumbing package, but they depend on the plans, underground work, fixture information, framing, testing, and later final connections.
Can NexGen perform only the rough-in?
A phase-specific request may be reviewed when the existing underground work, plans, testing status, fixture information, responsibility boundaries, and remaining work are clearly documented. Complete residential plumbing packages are easier to coordinate and verify.
Who purchases the fixtures?
Fixture purchasing responsibilities should be listed in the approved proposal. Customer- or builder-supplied fixtures should be complete, correct, undamaged, and available before the scheduled connection phase.
Can fixtures be changed after rough-in?
Some changes may remain possible, but they can require moving concealed piping, reopening walls or floors, changing valves, revising supports, replacing materials, or delaying other trades.
Does NexGen size the water heater for the new home?
Water-heater planning may consider bathroom count, fixture demand, tub size, shower systems, occupancy, simultaneous use, available utilities, equipment location, and recirculation when included in the approved scope.
Can gas piping be included?
Approved gas piping may be included when final appliance information, available capacity, pipe sizing, route, regulators, testing, shutoffs, and responsibility boundaries are defined.
Who handles excavation and concrete?
Excavation, backfill, compaction, concrete cutting, concrete repair, and slab work are included only when specifically listed in writing.
Who schedules inspections?
Inspection responsibility should be assigned before construction begins. NexGen does not automatically assume responsibility for every permit, fee, inspection, or third-party test.
What happens if another trade covers plumbing early?
NexGen should be notified before plumbing is covered. Reopening, exposing, repairing, retesting, or documenting prematurely covered work may require additional scope and approval.
Does new residential construction require several plumbing visits?
Yes. Plan review, underground work, rough-in, top-out, testing, inspections when applicable, fixture connections, equipment connections, and punch-list work occur at different stages.
Should I call NexGen about a residential construction project?
Yes. Call with the plans and project information available for estimating and scheduling. Mention any active construction phase, damaged piping, gas concern, or immediate site condition that requires prompt coordination.
Send the home plans before the underground and rough-in dates are set
Share the plans, fixture schedule, equipment selections, builder contacts, responsibility information, and construction dates so NexGen can begin defining the residential plumbing package.