Trenchless Sewer Line Replacement Proposal Template
Standard proposal scope for replacing collapsed, cracked, or root-invaded sewer laterals using trenchless pipe bursting or cured-in-place pipe (CIPP) epoxy lining.
Complete Scope of Work
Copy or customize these verbatim specifications into your contractor proposal.
1. High-Definition Sewer Camera Diagnostic
Pre-construction pipeline evaluation.
- Perform continuous color video inspection of sewer lateral from building cleanout to city sewer main.
- Locate depth and exact linear position of root intrusion, offsets, belly dips, or structural collapses.
- Provide homeowner and city inspector with digital recording of pre-repair condition.
2. Excavation of Launch & Receiving Pits
Minimal-impact access excavation.
- Excavate small entry and exit pits (4x4 ft) at building exterior and property boundary/main tie-in.
- Safely hand-dig around existing gas, electric, and communication utilities.
- Install shoring and protective trench barriers per OSHA safety standards.
3. Trenchless Pipe Installation (Bursting / CIPP)
Installation of monolithic seamless pipe.
- Pull high-density polyethylene (HDPE) seamless pipe through existing host line using hydraulic bursting head (or install epoxy-impregnated felt liner).
- Ensure complete fracture and outward displacement of obsolete clay, cast iron, or Orangeburg pipe.
- Fuse HDPE pipe joints with thermo-electric butt fusion for zero root infiltration and 100% leak-proof seals.
4. Cleanout Installation, Post-Camera & Warranty
Exterior cleanout, backfill, and warranty.
- Install double-sweep 4-inch PVC exterior cleanout to grade for future effortless mechanical servicing.
- Conduct post-installation video camera inspection verifying zero sags and seamless interior flow.
- Backfill and tamp excavation pits to grade.
- 50-Year manufacturer pipe material warranty and 10-year contractor workmanship warranty.
Standard Line-Item Material Allowances
Clear material specifications that protect against ambiguous scope arguments.
| Component / Assembly | Standard Specification | Unit / Allowance |
|---|---|---|
| Trenchless Sewer Lateral | 4-Inch SDR-17 Seamless HDPE or CIPP epoxy structural liner | Linear Feet |
| Access Pit Excavation & Shoring | Machine and hand excavation with backfill and compaction | Per Pit |
| Double-Sweep Cleanout | 4-Inch Schedule 40 PVC double-sweep with threaded brass cap | 1 Assembly |
| Color Video Camera Inspection | Pre- and post-repair digital sewer recording | 1 Service |
| Municipal Sewer Permit | Public works street/curb permit coordination | 1 Filing |
Scope-Gap Protections: 3 Clauses to Include
These contractual gotchas account for 85% of change-order arguments on trenchless sewer line replacement proposal templates.
The Risk: Trenchless bursting terminates at the property line; damage in the public street requires expensive asphalt cutting and city bonds.
Protective Clause: Clearly marks boundary of work: scope covers property line to building foundation; public right-of-way repairs are excluded unless specified.
The Risk: Pipe bursting follows the existing trench path; low sags with standing water cannot be eliminated without trenching to regrade.
Protective Clause: Clause states pipe bursting maintains existing grade; structural re-grading requires open-trench excavation.
The Risk: Excavation pits damage grass, pavers, or concrete sidewalks.
Protective Clause: Specifies that pits are backfilled and rough-graded; sod replacement, asphalt repair, and paver resetting are quoted separately.
Governing Building Codes & Standards
Frequently Asked Questions
What is the difference between trenchless pipe bursting and epoxy CIPP lining?▾
Pipe bursting pulls a heavy steel conical head through the old sewer pipe, breaking it apart and pulling brand-new seamless HDPE pipe in its place. CIPP lining inserts an epoxy-saturated felt sleeve into the existing pipe, curing it in place to create a smooth 'pipe within a pipe.'
Does trenchless sewer replacement save driveways and trees?▾
Yes. Rather than digging a continuous 60-foot trench through driveways, flowerbeds, and patios, trenchless methods only require two small access pits, saving thousands in landscape and hardscape restoration.
Related Plumbing Proposal Scopes
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