why does my drain keep clogging? Because the cause is still in the pipe. A cable clears a path through roots, grease or scale; it does not close the joint the roots grew through, strip the grease film off the wall, lift a bellied section, or rebuild a narrowed cast iron bore. Until a camera proves which condition yours is — root intrusion at failing joints, a belly holding water and solids, or scale and film rebuilding the clog from the wall inward — every cleaning is renting the same fix on the same calendar.
Cause one: roots, on a growth calendar
Roots are the most common repeat offender in Nashville's older stock, and the most misdiagnosed as "just another clog." The sequence from the Tennessee forum case that anchors half this site's guides: washer rinse cycle, wastewater up through the toilet base and shower, a root cutter pulling out a huge chunk of fine root hairs, relief — then the same show a month later. The next day's camera showed why: cast iron out of the house joining terra cotta clay in three-foot sections, with roots entering at the first joint and every joint after it. Roots don't break sound pipe; they find moisture at a leaking joint and grow in after it. Cut them and the joint is still open — the roots return at the speed roots grow, which is why root clogs recur on a calendar: the forum record puts a sound clay line at snaking every two to four years; a line needing it twice a year is telling you the entry points have multiplied past maintenance. The full root picture — species, cures and their limits — is in the roots guide.
Cause two: the belly that refills itself
A belly — a sag where the pipe dips and holds standing water — manufactures clogs on schedule without any help from roots or grease. Solids settle into the ponded section every day; the water that should carry them through is standing still. A cable knocks the accumulated plug loose and the drain runs beautifully — until the belly refills to the same depth and the same plug re-forms, sometimes within weeks. One banked JustAnswer case had a drain backing up for the second time, eight months apart, and the customer asked the perceptive question: if the pipe were collapsed, wouldn't it back up constantly? The expert's answer is the belly's signature too: a partial failure can be cleared temporarily, then dams again. Cleaning a belly is bailing a boat with a hole in it — the bailing is real work and sometimes worth doing, but nobody should sell it to you as a repair.
Cause three: the wall rebuilds the clog
Grease and scale don't block a pipe in an event; they narrow it by degrees. Kitchen grease cools on the wall a film at a time; cast iron tuberculation hangs rust and mineral growth from the crown; wipes snag on the roughened surface that both create. Then the clog that "came out of nowhere" is just the day the remaining bore met an ordinary load. A cable reopens the middle and leaves the wall exactly as it found it, which is why grease and scale lines clog again on shortening cycles. These are the two causes with genuine cleaning answers — hydro jetting scours the wall back toward its original bore, and descaling strips cast iron toward bare metal — but only after the camera confirms the wall underneath is sound. The cable vs jetting guide has the tool logic; the descaling guide has the cast iron limits.
The test that sorts them: what did the clean leave behind?
If you take one idea from this page, take the question the banked cases keep circling: after the last cleaning, did anyone look? The Tennessee homeowner learned his root mass was only about twenty percent removed only because he asked for the camera the next day. A post-clean camera pass is the difference between "the clog is gone" as a hope and as a fact — and the footage, with distances, names the cause: roots at joints at these feet, a belly holding water at that depth, scale on the crown along this stretch. Diagnosis first, then the decision the rest of this site is built around: maintain it on a schedule with the maths done honestly, or fix the condition.
What "handling it" actually looks like
For lines the camera clears for maintenance — sound walls, manageable causes — the answer is a plan, not a prayer: scheduled visits at $149, set by what the entry camera shows, with an anniversary camera check that watches the condition and tells you the year the maintenance maths flips toward replacement. Every clean carries our written 1-year clog warranty — double the six-month mark the forum's working rooters call the sign of a company that stands behind its work — with the exclusion printed: the warranty covers the cleaning on a sound pipe, and a pipe the camera shows broken, collapsed or bellied is a repair conversation, not a warranty claim. The terms live on the maintenance plans page. And for lines the camera condemns, we'll hand you the footage and the repair options in writing and wish you well if you take both elsewhere. Start with the look: the scope is $225 and the video is yours — (615) 555-0134.