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Open trench across the front lawn of a brick ranch house with new white PVC sewer pipe bedded in sand and a grey mini excavator at the far end

Sewer line replacement in Mobile, AL

Pipe Bursting in Mobile, AL

  • Bursting cost: $60 to $200 a foot in HomeGuide's and HomeAdvisor's national guides; Angi lists $150 to $190 a foot for bursting together with lining.
  • Time: faster than a trench, per HomeGuide, whose range for sewer replacements is 1 to 5 days.
  • Pits: usually two, at the foundation where the sewer exits and at the sidewalk cleanout.
  • Code limits: gravity pipe up to 6 inches, replaced with SDR 17 HDPE made to ASTM F714 (2021 plumbing code, adopted by Mobile).

In a burst, fused HDPE pipe is pulled through the old sewer line, breaking the clay or cast iron outward as the new pipe follows. Mobile Sewer Line Replacement refers you free to a plumber for the job; ask whether the quote names SDR 17 HDPE to ASTM F714. Mention the pipe size if you know it, and roughly how far the house sits from the street.

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Pipe Bursting Methods for Sewer Laterals

Bursting replaces the old pipe along its own path. A head bigger than the old pipe is pulled or driven through it, the old pipe breaks into pieces that are pushed into the soil, and new pipe follows right behind.

Compact gray hydraulic pulling rig set in a small access pit, with a steel cable running into an old clay sewer pipe

Static Bursting with a Hydraulic Rod or Cable Rig

A static rig sits in one pit and pulls. The UK Society for Trenchless Technology describes the rod version: steel rods are pushed through the old line, a steel expander cone is fixed to the lead rod, and the rig draws the cone and new pipe back through. Cable-based static rigs do the same with a wire cable. They're meant for small pipe over short distances and fit in small pits, and a trade-journal guide to lateral bursting uses one on house laterals.

  • Pipe size for the lateral cable rig in that guide: 2 to 6 inches.
  • Most lateral runs, by the guide's account: 20 to 80 feet.

Pneumatic Bursting

A pneumatic tool is an air-driven impact hammer with an expansion sleeve, drawn through the old pipe by a winch cable. The hammering cracks the pipe and drives the pieces outward, and the cable keeps the tool on the line of the old bore. The society notes it works best in soft, compressible ground and finds hard clays and dry, well-graded sands the toughest. Ask which method is planned for your line and why.

Same-Size Replacement Under the Code

Bursting rigs can upsize pipe in general, but the 2021 plumbing code Mobile adopted doesn't allow it for a building sewer. The replacement must match the existing nominal size, and nothing over 6 inches qualifies. MAWSS says a lateral is usually 4 or 6 inches, and Mobile allows no building sewer under 4 inches, so a 4-inch line comes back as 4-inch HDPE.

Broken fragments of brown clay sewer pipe lying in the bottom of an access pit next to the end of a new black HDPE pipe

Clay, Cast Iron and Old Repair Collars

Bursting depends on the old pipe being brittle. The society lists cast iron and vitrified clay among the materials suited to it; steel and ductile iron need special splitting gear. Collars from earlier repairs don't fracture the same way, so heads can carry cutting blades to slice through them. The broken pieces can scratch the outside of polyethylene pipe as it passes, which is why wall thickness matters. The code fixes it at SDR 17. For fiber pipe, see Orangeburg pipe replacement.

Long length of black HDPE pipe laid straight across a lawn with a plain gray fusion machine joining two pipe ends

Fused HDPE Pulled in One Length or in Sections

The new pipe is high-density polyethylene made to ASTM F714, a standard written partly for inserting new pipe into old sewers. Lengths are joined by heat fusion under ASTM F2620, which covers butt fusion. A string fused to full length on the lawn can be pulled in one go; otherwise the crew stops at set lengths to fuse the next piece. Fittings on the new line have to be HDPE too, made to ASTM D2683.

Gloved hands holding a sewer camera monitor showing a cracked clay pipe joint with roots, beside an open cleanout in a lawn

Why Mobile homeowners, landlords and businesses call Mobile Sewer Line Replacement

  • One licensed plumber gets the request, not a bidding list
  • No charge to you for the introduction
  • Ask to keep the camera video from before and after
  • Alabama plumbing licenses can be checked online

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Free for homeowners, landlords and businesses. One local contractor contacts you.

Pipe Bursting Limits: What It Won't Fix

  • A low spot

    Angi says trenchless methods aren't suitable for pipe with improper sloping. See sewer line belly repair.

  • Bends

    The trade-journal guide says bends of 22, 45 or 90 degrees have to be known before the job is set up. Ask how each bend on your video will be handled.

  • A collapsed run

    HomeAdvisor says trenchless replacement is sometimes unavailable when the pipe has completely collapsed; see trenchless sewer line replacement.

Bursting replaces the pipe; lining builds a new one inside it. For a line that has kept its shape, compare cured-in-place pipe lining.

Pipe Bursting Code Steps in Mobile

Mobile's plumbing code is the 2021 International Plumbing Code with local amendments, and its bursting section sets the order of work:

  1. 1

    Video before

    The old line is filmed on a recorded survey that notes where the cleanouts are and how deep the connections sit.
  2. 2

    Cleanouts

    If the old line lacked the cleanouts the code requires, they go in with the new pipe; see sewer cleanout installation.
  3. 3

    Video after

    The new pipe is filmed again, and the code official reviews that video before the pressure test.
  4. 4

    Test

    The new pipe and its connections are tested under the code's test section; Mobile's inspector may call for a gravity test with a 5-foot head of water held for 15 minutes.

Ask for both videos as files you keep, and ask whether the price covers both pits, any new cleanouts and putting the lawn back. If a MAWSS defect letter started the job, the invoice, permit and inspection approval go to MAWSS as proof; sewer line repair lists what it asks for.

Frequently asked questions

My lateral is 4-inch clay. Can it be burst up to 6-inch while the crew is there?
Not under the plumbing code Mobile adopted; the same-size section below explains the rule. If a bigger line is needed, ask about a dug replacement instead.
How many holes end up in the yard?
Usually two. A trade-journal guide to lateral bursting describes one pit where the sewer leaves the house and one outside near the sidewalk, where the cleanout sits. Angi describes the same pattern: some digging at the street and where the line enters the home. Roots that have grown over the old pipe can mean more digging, Angi notes.
Is the new pipe one continuous piece, or joined every few feet?
HDPE is joined by heat fusion, covered by ASTM F2620, which includes butt fusion. A trade-journal guide notes that a string fused to full length before the pull goes through without stopping; otherwise the crew stops at set lengths to fuse the next piece. The fused HDPE section below lists the pipe and fitting standards.
Can bursting go through a line with patched sections?
Often, with the right head. The UK Society for Trenchless Technology notes that repair collars on old pipe usually aren't brittle enough to fracture, so bursting heads can be fitted with cutting blades for them. Steel or ductile iron needs separate splitting gear. Ask the plumber to point out any old repairs on the camera video before the price is set.

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