SIX7 PLUMBING
SIX7 Plumbing Water Tank Cleaning Colombo
The story is sludge: an inch of it in most sumps, a sediment layer in most tanks. Flat 8,500 covers drain, scrub, sediment vacuum, food-safe sanitize and a refill test — with before/after photos.
Nothing dramatic hides in most Colombo tanks — which is exactly the problem, because "nothing dramatic" sludge is what makes tap water gritty and smells by year two. We drain, scrub the walls, vacuum the sediment out rather than stirring it, sanitize with food-safe agent flushed to safe levels, refill and test. The before/after photos go to you, the same ones we publish with permission.
Frequency is the only real decision: yearly for mains-fed tanks, every six months under trees or on well water, and always after a flood. The flat rate exists because the scope is standard — if your tank needs a repair or a replacement instead, we quote that separately on site rather than inflating the clean.
Grit in tap water
An inch of it in most sumps, a sediment layer in most tanks.
Smell from the taps
We vacuum the sediment out rather than stirring it, then sanitize with food-safe agent flushed to safe levels.
A year since last clean
Yearly for mains-fed tanks, every six months under trees or on well water.
Post-flood tank
Always after a flood — before/after photos go to you, the same ones we publish with permission.
Before the Scrub, After the Rinse
Two passes, one clean tank. Drag the slider to compare before and after cleaning.
How We Clean It
Our cleaning process ensures your tank is fully drained, scrubbed, disinfected, and safe.
Full Drain & Sludge Removal
Tank completely drained and all sediment scrubbed and removed.
Chlorine Disinfection
Proper chlorine treatment kills bacteria that plain water flushes miss.
Seal Check & Refill
Seals and connections inspected, then clean refill with water tested for safety.
Neighbor Approved
"We clean to the seams and show you the before-and-after — a tank is judged by what you can see."
— SIX7 Plumbing, Mount Lavinia
"Sediment, slime and scale each get their own pass — one rinse is not a clean."
— SIX7 Plumbing, Mount Lavinia
Fitted to Last
We use the right disinfectant, proper equipment, and test water quality after cleaning.
Chlorine Treatment
Proper concentration and contact time for effective disinfection.
Professional Equipment
Pumps, brushes and vacuums designed for tank cleaning — not household tools.
Water Quality Test
Post-clean water test to confirm safety before we refill.
The Nitty Gritty
Surface scooping misses 80% of sediment. Here's what we do:
- Full Drain & Sludge Removal: Tank completely drained, scrubbed, and all sediment removed.
- Chlorine Disinfection: Proper treatment kills bacteria that plain flushes miss.
- Seal Check & Refill: Seals inspected, clean refill, water tested for safety.
ALL CLEANINGS INCLUDE
6-Month Workmanship Warranty
"Flushing with a hose cleans the tank."
Surface flushing moves 20% of sediment. The rest stays and breeds bacteria.
Sludge draws up first — the last third of the drain runs clear while heavy sediment still sits below the outlet.
If your water tastes or smells off, clean the tank. If it's been over a year, it's overdue.
STARTING AT
LKR 8,500
Full drain, clean, disinfect & refill
*Price varies by tank size. Contact for accurate quote.
T&Cs apply — /pricing/ & /disclaimer/
Get a Quote
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