Fig. 01 — Mechanical Room, District Installation
Copper risers · Soldered joints · Code-compliant routing
Campus PlumbingBuilt to Code,Delivered on Schedule,Bid-Ready Today.
From kindergarten bathroom retrofits to university lab gas line installations — we deliver board-formatted bid packages, coordinate shutdowns around your academic calendar, and close every job with full inspection documentation.
CA LIC. #847291 · BONDED · INSURED · PREVAILING WAGE CERTIFIED
From Call to Closeout — Every Phase Documented
Hover each card to see what actually happens at that phase. No hidden steps, no surprise change orders.
Scope Walk
Eyes on every pipe before a line is drawn
We walk the building with your facilities team before quoting anything.
What we document on-site:
Every scope walk produces a photographic record organized by system — domestic water, sanitary, storm, gas.
- ▸Existing pipe material, diameter, condition
- ▸Shutoff valve locations & accessibility
- ▸Fixture counts by room and floor
- ▸Code conflicts flagged with photo reference
- ▸Asbestos or hazmat indicators noted
Code Review
CPC, ADA, DSA — cited by section, not summarized
We cross-reference California Plumbing Code, DSA requirements, and local amendments before the bid is written.
Codes we cross-reference:
Every applicable code section is cited in the bid package so your board's legal counsel can verify compliance independently.
- ▸California Plumbing Code (CPC) 2022
- ▸DSA requirements for K–12 & community college
- ▸ADA fixture count & accessibility standards
- ▸Local health department backflow rules
- ▸OSHPD requirements for lab gas systems
Board-Ready Bid
Line-item format your procurement office expects
Our bid packages are formatted to match public agency procurement requirements — CSI divisions, alternates clearly separated.
Bid package includes:
Formatted to match public agency procurement requirements — three-bid comparison ready.
- ▸CSI Division 22 format with section breakdowns
- ▸Material spec sheets with approved alternates
- ▸Labor hours by trade classification
- ▸Prevailing wage compliance declaration
- ▸Bonding & insurance certificates attached
Shutdown Plan
Zero surprises on Monday morning
We coordinate every service interruption around your academic calendar — no shutdowns during finals, testing windows, or board meeting weeks.
How we coordinate shutdowns:
Every shutdown window is pre-approved by your facilities director and documented in writing.
- ▸Academic calendar reviewed before scheduling
- ▸Shutdown duration estimated within ±2 hours
- ▸Temporary facilities arranged if needed
- ▸48-hour confirmation notice to building staff
- ▸Single point of contact throughout outage
Phased Installation
Buildings stay operational during construction
We sequence work to keep occupied wings of your building running while construction zones are isolated.
Phasing approach:
No single phase takes more than one wing offline at a time — students and staff keep access to functioning facilities.
- ▸Wing-by-wing sequencing documented on drawings
- ▸Temporary connections maintain service continuity
- ▸Daily progress photos sent to project manager
- ▸Material staging in designated areas only
- ▸Cleanup to occupied-building standard daily
Final Inspection & Docs
Closeout package ready the day of sign-off
We walk the final inspection with the building inspector and hand over a complete documentation package before we leave.
Closeout package contains:
Your facilities file gets everything needed for the next maintenance cycle or capital project.
- ▸Signed inspection card & permit closeout
- ▸As-built drawings in PDF and DWG format
- ▸Fixture & equipment warranty cards registered
- ▸Maintenance schedule with service intervals
- ▸Emergency shutoff locations updated on floor plan
What We Build — Scope Summaries
Each project type has a standard scope structure. Click to see what's included before you call.
Restroom Renovation
Full fixture replacement, ADA compliance upgrade, supply & drain rough-in
- //ADA fixture count per occupancy load
- //Water-saving fixture selection & submittal
- //Tile-ready rough-in with floor drain
- //Flush valve & sensor upgrade
Boiler Replacement
Hydronic boiler swap, gas line reroute, expansion tank, controls integration
- //Boiler sizing per ASHRAE load calc
- //Gas line capacity verification
- //Expansion tank & relief valve sizing
- //BAS integration wiring coordination
Backflow Prevention
DCVA or RPZ installation, test & certification, health department submittal
- //Assembly selection per hazard classification
- //Annual test & cert program available
- //Health dept. submittal package included
- //Irrigation & lab isolation assemblies
Lab Gas Systems
Natural gas, compressed air, vacuum, and specialty gas distribution for science labs
- //NFPA 45 & CPC compliance by section
- //Bench manifold & emergency shutoff design
- //Pressure testing & documentation package
- //Coordination with fume hood contractor
Additional Scope Types
Request a Bid Package
We format bid packages to match district procurement requirements — CSI divisions, prevailing wage declarations, and alternates clearly separated. Ready for your Tuesday board vote.
MAINLINE PLUMBING, INC.
School District Plumbing Spec Sheet
Spec Sheet Includes:
- Fixture count standards per occupancy type
- Pipe material specifications by system
- Code references: CPC 2022, DSA, ADA
- Prevailing wage rate schedule (current)
- Standard bid format — CSI Division 22
- Emergency response protocol & SLAs
- Sample closeout documentation package
- Backflow assembly selection guide
Download Our School District Plumbing Spec Sheet
Eight pages of fixture standards, pipe specs, code references, and bid format guidance — written for facilities professionals, not general contractors.