Commercial plumbing, bid from the drawings

Typical items for this kind of work. Each proposal lists the items for that job.

1. PhaseTypical items
2. 01

   Demolition & cap-offs

   • Disconnect and cap existing fixtures, branches and risers at the demolition line
   • Safe-off and remove abandoned piping where accessible
   • Temporary caps and protection so the rest of the building keeps water and drainage
3. 02

   Underground & underslab

   • Trenching, bedding and backfill inside the building footprint (slab saw-cutting and patching by others)
   • Sanitary and storm piping below the slab, cleanouts to grade
   • Sleeves at foundation walls and slab penetrations before the pour
   • Test before backfill; inspection before the slab closes
4. 03

   Sanitary, waste & vent

   • No-hub cast iron for sanitary and vent; PVC only where NYC allows plastic (residential buildings of five stories or less); stacks and branches sized by drainage fixture units
   • Vents through roof, cleanouts at direction changes and the base of every stack
   • Floor drains, floor sinks, hub drains, trench drains with covers matched to the floor finish
   • Trap primers on drains not in daily use
   • Grease interceptors sized to the flow of the fixtures that drain to them, with flow control
   • Indirect wastes and air gaps for food-service and medical equipment
5. 04

   Storm drainage

   • Roof drains, overflow drains and leaders
   • Area and yard drains
   • Connection at the building line to the house drain or combined sewer
6. 05

   Domestic water

   • Service connection from the meter; pressure-reducing valve where static pressure exceeds 85 psi (NYC Plumbing Code 604.8)
   • Type L copper hot, cold and return; isolation valves at every riser and branch
   • Recirculation pump, check valve and thermostatic mixing valves
   • Water hammer arrestors at flush-valve and quick-closing fixtures
   • Backflow prevention by hazard (RPZ or double check): DEP-approved plan, initial test report within 30 days, yearly test
   • Pipe insulation per spec; pressure test before walls close; flush and disinfect before occupancy
7. 06

   Fixtures & trim

   • Carriers for wall-hung water closets and lavatories; ADA layouts and grab-bar backing dimensions to the framer
   • Flushometers, sensor valves, lavatories, sinks, hand sinks, three-compartment sinks, mop sinks, showers, drinking fountains
   • Final connections to dishwashers, ice machines, coffee and beverage equipment
   • Trim and testing at the end: every fixture run, every trap checked
8. 07

   Equipment

   • Water heaters (tank, tankless or commercial) with T&P relief, expansion tank, isolation and drain valves
   • Recirculation, booster, sump and sewage ejector pumps
   • Interceptors, neutralization tanks, water filtration where specified
   • Gas appliance connections and shutoffs where they are in the project scope
9. 08

   Permits, inspections, testing & close-out

   • Plumbing drawings for the DOB filing by the project's architect or engineer, where the work needs them
   • Rough-in and final inspections coordinated with the GC and your super
   • Pressure-test logs, riser notes, as-built sketches, equipment data
   • Close-out package (test logs, riser notes, as-builts, equipment data and manufacturer warranties) handed over at the end of the job

PlumbHub LLC is a plumbing project contractor. Permitted plumbing work in New York City is filed, supervised and signed off by the New York City Licensed Master Plumber engaged for each project.