Why pipe bursting upsizing is selected in Florida and the Southeast

Pipe bursting upsizing replaces an existing pipe along the same alignment while increasing its diameter with minimal surface disruption—well suited to Florida’s high groundwater, sandy soils, and dense utilities, as well as urban corridors across the Southeast. Hinterland performs pipe bursting as part of its in‑house trenchless portfolio, enabling method selection alongside CIPP, geopolymer lining, and sliplining based on constructability and lifecycle value. See our in‑scope capabilities on the Services page and the dedicated Pipe Rehabilitation overview.

Systems and use cases

• Gravity sewer: eliminate I/I and add capacity without long open‑cut trenches.

• Force mains and water mains: increase conveyance and corrosion resistance while controlling outages with planned bypassing.

• Stormwater: upsize CMP/VCP/AC segments to mitigate flooding and restore hydraulic performance.

• Constraints typically assessed: cover depth, nearby utilities, soil/groundwater, surface settlement tolerance, structures and crossings, and allowable shutdown windows. For regional markets and conditions served (FL, GA, AL, LA, TX, TN, SC, NC), see Markets We Serve.

AWWA C622: scope and compliance touchpoints

AWWA C622 (Pipe Bursting of Water Mains) provides guidance for material selection, submittals, pre‑construction surveys, insertion/receiving pits, equipment, installation, and testing. Typical owner/engineer requirements aligned to AWWA C622 include:

• Submittals: product pipe data (resin/class/DR where applicable), fusion procedures, bursting head configuration, pulling loads, and installation plan.

• Pre‑construction: CCTV where applicable, utility locates, condition assessment, and service inventory; confirm pit locations, traffic control, groundwater control, and bypass contingencies.

• Materials: thermoplastic pressure pipe (e.g., HDPE or fusible PVC) sized for pressure class, surge, and SDR/DR; mechanical transition fittings to existing appurtenances as specified by the owner.

• Installation controls: continuous monitoring of pull force, rate, and line/grade; protection of adjacent utilities and structures.

• Acceptance: pressure/leakage testing for pressure pipe; post‑installation CCTV/mandrel where specified; restoration and documentation per record requirements.

Note: Many municipal owners also cross‑reference their standard specifications for testing and appurtenances in addition to AWWA C622. Project‑specific requirements govern.

Example upsizing scenarios (illustrative)

The following examples illustrate common before/after diameters and product pipe pairings encountered in municipal work. Final selection is engineer‑of‑record driven.

Existing pipe (material)	Target new diameter	Typical product pipe	Typical application	Notes
8 in VCP gravity sewer	12 in	HDPE PE4710 (DR per design)	Capacity restoration with I/I reduction	New manhole/channel adjustments as needed
10 in DIP force main	16 in	HDPE PE4710 or fusible PVC	Wet‑weather conveyance increase	Surge analysis drives DR/class
12 in AC water main	18 in	Fusible PVC (AWWA C900) or HDPE	Level‑of‑service upgrade, corrosion resistance	Special handling for AC per owner SOP

Materials and connections

• Product pipe: HDPE PE4710 and fusible PVC are common for bursting; DR/pressure class is set by working pressure, surge, and burial conditions. Ductile iron may be used for short above‑grade or complex structures by open‑cut tie‑ins.

• Joints: Butt fusion (HDPE) or thermal‑fusion (PVC) to form a continuous string; restrained mechanical fittings where specified.

• Transitions: Mechanical couplings or flanged adapters to existing DI/PVC appurtenances, valves, and hydrants.

• Structures: Manhole/channel benching adjustments for sewer upsizes; frame/cover and invert modifications as required.

Service lateral reinstatement and appurtenances

• Pre‑burst mapping: CCTV and locates to inventory active laterals and services; coordinate customer notifications and bypass if needed.

• Reconnection: After the new main is installed, laterals are reconnected by spot excavations and installation of fusion saddle tees (for HDPE) or approved service saddles/tees (for fusible PVC/DI), with corporation stops and curb boxes for water; gravity sewer laterals tie with gasketed or solvent‑welded fittings per owner standards.

• Verification: Pressure or air testing of new service taps as applicable; dye or CCTV confirmation for gravity connections; restoration of surfaces to pre‑construction condition.

Construction sequencing for Florida/Southeast conditions

1) Cleaning and CCTV (where applicable) to verify alignment and identify obstructions. 2) Utility locates and survey; traffic and MOT setup. 3) Bypass pumping design and setup for wet utilities. 4) Insertion/receiving pit excavation with sheeting and groundwater control as required. 5) Fuse product pipe string; perform fusion QA/QC and record logs. 6) Pilot head/expander setup and bursting operation with real‑time load monitoring. 7) Tie‑ins, appurtenance installation, and service lateral reinstatements. 8) Testing (pressure/leakage/CCTV per owner specs). 9) Surface restoration and as‑built documentation.

When to choose bursting vs. lining or open cut

• Choose pipe bursting upsizing when capacity must increase and the existing alignment is viable, with limited room for new corridors.

• Consider CIPP or sliplining when structural renewal is needed without a diameter increase and sufficient capacity remains.

• Consider open‑cut or new alignment when settlement tolerance is low, conflicts are prohibitive, or grade control is critical beyond bursting tolerances.

Hinterland performs all these trenchless technologies in‑house and can recommend the most cost‑effective approach for each reach; see Services for method summaries and related offerings.

Regional project evidence

Explore comparable pipeline rehabilitation and utility upgrades completed by Hinterland across Florida and the Southeast on the Case Studies hub. These examples demonstrate complex traffic control, bypassing, groundwater management, and multi‑discipline tie‑ins typical of upsizing programs.

Engage Hinterland for design‑assist or bid support

• Early constructability input: pit locations, pull lengths, bypass windows, and appurtenance standardization.

• Packaging for capital programs: prioritize reaches with highest hydraulic return and lowest risk.

• Emergency or planned work: scheduling aligned to municipal outages and seasonal constraints.

See Services and Case Studies to coordinate scope, specifications, and delivery windows for Florida and the broader Southeast.