PLUMBING PLANS,
REVIEWED & SEALED.
Water, waste, vent and gas — sized from fixture units, checked against the plumbing code your jurisdiction enforces, and sealed by a licensed PE when the math holds.
Plumbing review and sealing means a professional engineer licensed in the project jurisdiction verifies your water-supply sizing, drainage and vent design, fixture-unit calculations and specialty systems against the adopted plumbing code. Packages that meet code and standard of care are signed and sealed by the responsible PE; the rest return with a written, code-cited correction list.
What a plumbing review actually covers
Plumbing design lives and dies on arithmetic: fixture units in, pipe sizes out. The reviewer rebuilds the water-supply calculation — fixture units, pressure available at the meter, developed length, elevation — and confirms the distribution sizes that result. On the drainage side, the reviewer checks DFU totals against the building drain and sewer sizes, venting method and distances, and the slope and cleanout provisions the local code actually enforces, which differ between the IPC and UPC families in ways that sink out-of-state templates.
The review extends to the systems around the core: domestic hot water and recirculation, backflow prevention at the service and at fixtures, grease interception for food service, gas piping sizing where the jurisdiction includes it in the plumbing package, storm drainage and overflow provisions, and medical gas or process piping where the occupancy demands it. Commercial kitchens, multifamily stacks and healthcare occupancies are where plumbing packages earn their corrections — and where a jurisdiction-fluent reviewer earns their fee.
On the checklist
- Water-supply sizing from fixture units and available pressure
- Drainage (DFU) totals, slopes and cleanouts
- Venting method, distances and UPC/IPC family differences
- Hot-water generation and recirculation
- Backflow prevention — service and fixture level
- Grease interception and food-service provisions
- Gas piping sizing where in scope
- Storm drainage and secondary (overflow) systems
Who sends us plumbing plans
Plumbing and mechanical design-builders, restaurant and retail rollout teams replicating a prototype into new code jurisdictions, and multifamily developers whose engineer of record doesn't hold the project state. The prototype problem is the signature one: a set that passed in a UPC state gets submitted in an IPC state (or the reverse) and comes back wearing red ink. A jurisdiction-specific review before submission is the difference between a rollout and a siege.
As with every discipline here, the sealing PE certifies the design as their own professional work. Fixture counts get verified against the architectural set, sizes get recomputed, and anything that would draw a plans examiner's comment gets flagged in our correction list first.
Corrections we see most
Fixture-unit totals that don't match the fixture schedule. Venting designed to the wrong code family's rules. Water service sized without checking the pressure actually available at the site. Grease interceptors sized by habit instead of by the local ordinance's method. Hot-water recirculation drawn as a loop with no balancing provisions. Each is a known failure with a known fix — in review, in one pass.
Cost & timeline
Plumbing review is scoped per set. Drivers: fixture count and building type, the number of systems in the package (domestic water, sanitary, storm, gas, grease, specialty), prototype-vs-custom design, and how far the set is from the local code family's rules. Send the plans; the written quote comes back before the review is scheduled.
Every engagement is quoted in writing with its own timeline before work starts — an estimate built from your package's actual scope, stated per engagement rather than promised by slogan. A complete, review-ready set moves first; incomplete sets get a completeness note, so nobody pays to review half a package.