CSI DIVISION 22
Division 22 commercial plumbing contractor
WORKING TO SPECIFICATION
Division 22 is where the plumbing scope is defined
On a specified commercial project, the plumbing work sits under Division 22 of the CSI MasterFormat, covering piping, equipment, insulation, fixtures and the general plumbing requirements that sit at the front of the division. Architects, engineers and project managers use that structure to compare bids, so a contractor who prices outside it is hard to evaluate.
We bid Division 22 by section. The general requirements sections set the submittal, testing and closeout obligations; the piping sections set materials and installation standards; the equipment and fixture sections set what may be supplied and which substitutions are acceptable.
That matters most at submittal. A specification that names three acceptable manufacturers and requires a substitution request for anything else is not a suggestion, and returning a submittal that ignores it costs the whole project a review cycle.
How we work a specified project
- Bid organized by Division 22 section number
- Substitution requests raised before bid, not after award
- Submittals in the format and quantity the spec requires
- Shop drawings coordinated with the other trades
- Testing witnessed and documented per the spec
- Closeout package assembled to the spec’s checklist
DIVISION 22 SCOPE
The work areas within Division 22
Common work results
The general requirements at the front of the division — submittal procedures, quality assurance, identification, supports, sleeves and firestopping, and the testing and closeout obligations.
Plumbing insulation and protection
Pipe insulation for hot, cold and recirculated water, protection of exposed piping under accessible lavatories, and the firestopping of every penetration through rated construction.
Domestic water piping
Materials, joining methods, valves, hangers and supports, disinfection and testing for the potable water distribution system, installed to the specified standard.
Sanitary and vent piping
Waste and vent materials, slope, supports, cleanouts and testing, plus specialties such as floor drains, floor sinks, trap primers and interceptors.
Plumbing equipment
Water heaters, storage tanks, mixing assemblies, pumps and expansion control, with the seismic restraint, venting and clearances the specification and the code require.
Plumbing fixtures
Water closets, urinals, lavatories, sinks, service basins, drinking fountains and carriers, supplied to the specified manufacturer and model or an approved equal.
SPEC COMPLIANCE
How we run a specified project
01
Read the division before pricing
02
Clarify substitutions at bid time
03
Submit in the specified format
04
Coordinate the shop drawings
05
Test and document
06
Close out to the checklist
COMMON QUESTIONS
Division 22 questions
Plumbing. Under the CSI MasterFormat structure, Division 22 covers plumbing piping, insulation, equipment, fixtures and specialties, along with the general plumbing requirements. Fire suppression sits in Division 21 and HVAC in Division 23, which is where most scope-gap arguments start.
The boundary is normally drawn at equipment connections — for example, gas piping to a rooftop unit, or condensate drainage from mechanical equipment. Because the split varies between specifications, we state our reading of it in the bid scope letter so it is settled before award.
Yes, where the specification requires it. That typically means functional testing of water heating and recirculation, documented start-up, and attendance at the commissioning agent’s tests, with the results recorded on the agent’s forms.
Yes, through the substitution process the specification defines. We submit the comparison the spec asks for and wait for written approval. We do not install an unapproved equal and present it as compliant.
As-built markups, operation and maintenance manuals, warranty documents, valve charts and identification schedules, backflow test certificates, start-up reports, and the spare parts and attic stock the specification calls for.