should I clean my sewer line again or replace it? Run the rooter's formula: (cleanings per year × 1.75 × years you'll stay in the house) × today's cleaning price, and compare it to the replacement quote. If the cleaning side wins by a wide margin and the pipe is structurally sound, keep cleaning — a sound clay line typically needs snaking every two to four years. If the two sides meet, or the camera shows collapse, oval or a deep belly, cleaning has stopped being maintenance and become rent on a failed pipe. Replace.
The formula, piece by piece
Cleanings per year is the number you already know if you've lived with the line a while: once every few years, yearly, twice a year. If you don't know it yet — first clog, new house — a camera inspection tells you what the interval is likely to be, because the interval is set by the defect: fine root hairs at one joint grow back slower than a root mass at six joints.
1.75 is the rooter's allowance for prices rising across the years you'll be paying them. It's his number, from his trade, offered as a planning figure rather than a promise — but some allowance belongs in the maths, because comparing today's cleaning price, frozen, against a replacement quote is rigging the sum in cleaning's favor.
Years you'll stay is the variable homeowners most often lie to themselves about, and it swings the answer more than any other. Two more years in a starter house and a decade in the family home are different decisions wearing the same clog. Be honest with this number before you're honest with any other.
Today's cleaning price should be a real one. On our list a main line clean is $249 with the camera run before and after — the cost page holds the whole list, dated. If a line needs a maintenance plan instead, the scheduled visit is $149, which is exactly the kind of number that belongs on the cleaning side of the ledger.
Worked examples, so you can see it breathe
A Donelson ranch, clay line, roots at the joints, snaked once a year, staying ten years: (1 × 1.75 × 10) × $249 ≈ $4,358 of lifetime cleaning — against a replacement quote that for a typical run starts around $95 a linear foot on our list. Cleaning wins, and it isn't close. That's why the forum's Orangeburg thread could note, without anyone arguing, that a 1950s line kept on a yearly snake had years left in it.
Same house, but the line now needs cleaning twice a year and the camera shows the joints going at every section: (2 × 1.75 × 10) × $249 ≈ $8,715 — and the sum still understates it, because it prices only the cleanings, not the 2 a.m. backups between them. Now the two sides are in the same conversation, and the condition evidence takes over the decision.
And the case where the formula doesn't get a vote: the camera shows the pipe ovalled, fractured with soil showing, or bellied deep enough to hold sewage permanently. A cleaning price multiplied by anything is still money spent on a pipe that cannot be cleaned into working. The JustAnswer expert's verdict on cracked cast iron applies to the whole category — no amount of drain cleaning fixes a failed pipe. Replace, and let the maths retire.
Where a maintenance plan fits — and where it doesn't
If the cleaning side wins, the cheapest version of cleaning is the scheduled kind: $149 plan visits set by what the entry camera shows, before the backup chooses the hour, under a written 1-year clog warranty. The forum rooters' benchmark — a guarantee of six months or better marks a company that stands behind its cleanings — is one we print because we clear it: ours is a year, on a sound pipe, with the structural exclusion stated in writing. The maintenance plans page has the terms. And if the replacement side wins, the sewer line repair page lays out the verdict ladder — point repair, sectional replacement, full replacement, trenchless where it fits — priced in writing from the footage, because a decision this size should never rest on a number called out across a yard.
One limit, stated plainly: this guide does the arithmetic, it doesn't do the diagnosis. If nobody has camera'd your line, the inputs are guesses — the scope is $225 and the video is yours either way. Call (615) 555-0134 and we'll run both the camera and the sums with you.