Evidence File · Verified Google Review
Crawlspace Drain Line Replacement, Financed at 0%
A homeowner needed a failed under-floor drain system taken out and rebuilt — through a hatch barely wider than the pipe. Here is what the job looked like from inside the crawlspace, and what it looked like from the homeowner’s side of the door.
Documented on site · Before backfill
- Customer
- Yangzhi “Z” Zhao
- Primary work
- Under-floor drain line replacement in PVC
- Access
- Exterior crawlspace hatch
- Payment
- 0% promotional financing
- Outcome
- 5-star Google review
The Challenge
Everything hard about this job happens before a single pipe gets cut
Access
One opening, the width of a length of pipe
The crawlspace is reached through a hatch cut into the foundation below the brick sill. Every stick of PVC, every fitting, every bucket of spoil and every tool passes through that gap. There is no staging area inside and no room to turn around once you are under the floor.
Verification
The finished work disappears under sand
Under a crawlspace there is no drywall to open and close. The trunk line is trenched into sand, connected, and buried. Once backfilled, nobody — homeowner, future buyer, or inspector — can see whether it was pitched correctly, supported properly, or cleaned out at all. That is exactly why it gets photographed first.
Occupied home
The family lives there while the drains are down
Drains are out of service for the duration and a crew is moving in and out of the home. In that situation, arriving when you said you would, saying where things stand, and cleaning up before you leave are not soft courtesies. They are the difference between a bad week and a manageable one.
The Work
How Bison sequenced the replacement
These steps run in order, because each one gates the next.
Scope the line, then price the job before anything is opened
A drain system is diagnosed before it is quoted. A sewer camera inspection establishes what is actually failing and how far the problem runs, so the homeowner approves a defined scope rather than an open-ended dig. The written number, and the financing options behind it, come before the crew shows up.
Open the access and stage everything from outside
Pipe is cut to length outside and fed through the hatch. Spoil comes back out the same way. Working from the exterior keeps material, dust, and traffic out of the living space — which is the mechanical reason a job like this can end with a homeowner saying the crew cleaned up after themselves.
Remove the failed line and set the new trunk run
The original metal drain line is cut out and hauled away, and a new PVC trunk line is trenched, pitched, and set the length of the crawlspace. This is full sewer and drain line replacement, not a spot repair — the run is replaced end to end so there is no old pipe left to fail behind the new work.
Tie in the branches, the stack, and permanent cleanouts
Each fixture branch is picked up off the trunk with a wye, strapped to the joists, and connected to the stack. Cleanout risers are set at the accessible points so any future main line cleaning or drain cleaning can be done from the cleanout instead of by pulling a toilet or reopening the floor.
Photograph, backfill, and leave the site clean
The completed system is documented while still exposed — that record is what makes a post-repair inspection meaningful and what a homeowner hands to a buyer years later. Then the trench is backfilled, the debris leaves with the crew, and the access is closed up.
Documentation
Job site photos, before backfill
Five frames from the crawlspace, in working order.
The Crew
“Extremely professional and polite” is a hiring outcome
A homeowner never sees the pipe. What they see is who comes to the door, whether the truck shows up when it was promised, and what the crawlspace looks like after the trailer pulls away. Those are staffing decisions, not plumbing decisions — and they are the part of the job Z chose to write about.
Bison Plumbing has been family-owned and operated out of Warren since 1998, serving Macomb and Oakland County homeowners.
The Result
What the homeowner got
No legacy pipe left in the system
The failing line was replaced end to end rather than patched, so there is no aged section waiting to fail behind new work.
Permanent cleanout access
Future maintenance is done from a cleanout riser instead of by pulling fixtures or reopening the crawlspace floor.
Photographic record before backfill
Documentation of buried work that holds up at resale, at inspection, and in any warranty conversation.
A repair paid for over time
The homeowner used a promotional 0% plan rather than draining savings for an unplanned structural repair.
In His Own Words
Extremely professional and polite crew. On time, communicated with us on status, and cleaned up after they were finished. Pricing was very reasonable and they offer a 12 month 0% financing as well.
Verify it yourself
This review is public on Bison Plumbing’s Google Business Profile, unedited.
Paying For It
What “reasonable pricing” looks like on a repair nobody budgeted for
Nobody plans for a drain line replacement. It arrives as an emergency, and the honest problem with a fair quote is that it still has to be paid. Z’s review names the thing that made the number workable — not a discount, but terms.
Bison Plumbing financing
Current termsA promotional plan with no interest when the balance is paid in full inside the window.
Work starts without a deposit, and approval is often returned in minutes.
Checking your options uses a soft credit check — no impact to your credit score.
Fixed-rate and flexible-rate options when a longer runway beats a promotional window.
Z’s review was posted in 2025 and refers to a 12-month 0% promotion offered at that time. Terms change — see the current financing page for today’s plans, APR ranges, and lender disclosures. Financing provided through GreenSky and issued by Synovus Bank, Member FDIC. Subject to credit approval.
Questions
What homeowners ask before this job starts
Can a drain line be replaced in a crawlspace without digging up my yard?
Yes, when the failure is in the under-floor portion of the system. The trunk line and branches inside a crawlspace are reached from the crawlspace itself, so the lawn, driveway, and landscaping stay intact. If the failure continues past the footing and out to the municipal main, that outside section is a separate scope — and it can often be handled with trenchless sewer repair or CIPP pipe lining instead of open excavation. A camera inspection is what tells you which situation you have.
Do I have to move out while the work is done?
Usually not, but you should plan on the drains being out of service while the line is open. That means no toilets, sinks, showers, laundry, or dishwasher during working hours. The crew should tell you at the start of each day what will be down and for how long — the status updates Z mentions in his review are exactly what makes staying in the house workable.
Does Bison Plumbing offer financing for a sewer or drain line replacement?
Yes. Bison Plumbing offers financing with $0 down, including a promotional plan with no interest if the balance is paid in full within 15 months, plus fixed-rate and flexible-rate plans for longer terms. Pre-qualification uses a soft credit check that does not affect your credit score, and approval is often returned in minutes. Full terms are on the financing page.
Why install cleanouts if the pipe is brand new?
Because new pipe does not stop what people put down it. Grease, wipes, and root intrusion at outside joints will eventually need attention regardless of pipe age. A cleanout riser means that future main line cleaning or hydro jetting is a straightforward service call rather than a job that starts by pulling a toilet or reopening the crawlspace. Skipping them saves an hour on install day and costs money every time thereafter.
How do I prove the work under my floor was done correctly?
With documentation captured before the trench is backfilled, plus a post-repair camera inspection of the finished line. That combination gives you a dated visual record of pitch, support, materials, and cleanout placement. It matters most years later, when you sell and a buyer’s pre-purchase sewer inspection raises questions about the system.
Related
Services used on this job
Further reading
Next Step
Think your drain line is the problem?
Get it looked at before it decides the timeline for you. Camera first, written scope second, financing available on approved credit — serving Macomb and Oakland County homeowners since 1998.