Build the plumbing list around the selected products
| Item | Information to confirm | What it can change |
|---|---|---|
| Sink and faucet | Models, bowl layout, mounting, faucet reach, holes, accessories, and countertop thickness | Drain position, disposal space, supplies, supports, and countertop penetrations |
| Dishwasher | Model, cabinet opening, water, drain, power, hose route, and manufacturer instructions | Shutoff, drainage method, service loop, adjacent cabinet access, and electrical coordination |
| Refrigerator or ice maker | Model, location, water requirement, shutoff, protection, and service clearance | Supply route and whether the connection remains accessible after the unit is installed |
| Filtration or reverse osmosis | Model, tank, faucet, feed, drain, power, filter clearance, and treatment purpose | Sink-base storage, drain connection, countertop hole, and future filter access |
| Cooking appliance | Exact fuel, input when gas-fired, connection point, power, ventilation, clearances, and installer | Whether gas, electrical, mechanical, cabinet, and appliance work must be coordinated separately |
Check the kitchen that is already there
- Locate the visible sink drain, vent, water lines, shutoffs, appliance connections, gas piping, and accessible electrical equipment without opening or altering them.
- Record whether the sink stays on its wall, moves along the wall, or moves to an island, because each option changes the drainage and access questions.
- Note recurring clogs, leaks, damaged shutoffs, low flow, slow hot-water delivery, or old repairs that should be evaluated before new cabinets hide them.
- Identify the floor assembly, ceiling access below, exterior walls, slab conditions, and known structural limits without assuming a concealed route.
- Confirm whether an equipment or fixture change affects water-heater demand, gas piping, ventilation, drainage, or electrical capacity; the responsible trade must verify its own system.
What should be settled before rough-in
Approve the cabinet geometry
Confirm the sink base, drawer boxes, shelves, waste pullouts, panels, toe kicks, and appliance openings. Mark the zones needed for traps, disposals, filters, valves, hoses, and access.
Approve connection-critical products
Allowances can support early budgeting, but a rough-in location should not be called final while the sink, faucet, dishwasher, refrigerator, valve, or equipment specification that controls it is unknown.
Overlay the other utilities
Coordinate plumbing with electrical equipment, ventilation, framing, cabinets, countertops, backsplashes, flooring, and appliance service. Gas and electrical work require the appropriate trade and applicable approvals.
Set the inspection hold point
Do not close a wall, cover below-floor piping, or fix cabinetry over work that still needs a required test or inspection. Norman and Oklahoma City publish separate permit and inspection processes. [3] [4] [6]
Write down connection responsibility
State who supplies, receives, assembles, installs, connects, powers, starts, and services each item. This prevents a missing part or incompatible product from becoming an assumed plumbing obligation.
Two kitchen checkpoints that prevent rework
Before rough-in
Before final connections
Use the current cabinet plan, finished-wall buildup, countertop thickness, appliance openings, and approved model information.
Confirm cabinets and counters are secured, openings match the selected products, and connection spaces remain reachable.
Reserve pipe and access zones before cabinet drilling or floor penetrations are released.
Have fixtures, filters, trim, hoses, required accessories, and manufacturer instructions onsite and checked for damage or missing parts.
Identify tests, inspections, and approvals that must happen while work remains visible.
Operate and check completed plumbing connections under their intended conditions, then show the owner the accessible shutoffs and service points.