SIX7 PLUMBING
SIX7 Plumbing Water Tank Replacement Colombo
Old tank drained, disconnected, removed and disposed; new tank set, plumbed and sanitized — same day, one dispatch, from 15,000 for a standard poly remove-and-replace.
T&Cs apply — /pricing/ & /disclaimer/
Past a point, cleaning is theater: sun-brittle walls, algae-scaled interiors, a stand that's rusted or leaning. Replacement means drain, disconnect, get the old tank down and away (disposal included — not left at your curb), verify or rebuild the stand, set the new tank with new floats and unions, sanitize the line, fill-test.
The from-15,000 price covers removal plus a standard poly tank supplied and fitted; larger capacities, multi-tank configurations and crane access are quoted from the same visit. Manufacturer warranty rides with the tank; our plumbing carries the 6-month shield.
Brittle cracked tank
Sun-brittle poly tanks crack at fittings and split along the body. A patch holds until the next pressure spike.
Algae returns after cleaning
Scale and algae in a brittle interior return within weeks. The tank becomes the contamination source.
Undersized tank upgrade
Undersized tanks run dry — sized up to what the household actually draws.
Leaning or rusted stand
Rusted or leaning stands are a collapse risk — a full tank weighs a tonne.
What You're Paying For
Transparent pricing — here is exactly what our base fee covers and what costs extra.
What's Included
- Drain, disconnect & removal of old tank
- Old tank disposal — down and away
- New tank install with fresh floats & unions
- Line sanitize & fill-cycle test
- 6-month workmanship shield
Parts & Extras
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New Tank Supply Supplied at cost + 15% markup, or bring your own.
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Stand Repair/Build If the existing stand is unsafe, rebuild quoted separately.
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After-Hours Dispatch Nights, weekends, and holidays: +40% on hourly rate.
"Cleaning revives any tank."
Scale and algae in a brittle interior return within weeks; cleaning buys time, not health.
OLD TANK DISPOSAL IS INCLUDED — DOWN AND AWAY, NOT LEFT AT YOUR CURB.
Cause
Past a point, algae-scaled and sun-brittle interiors aren't worth cleaning; the tank becomes the contamination source.
How We Fix It
Drain, disconnect, remove, dispose, set new tank, new floats/unions, sanitize the line, fill-test.
If your tank is more than 10 years old and showing signs of brittleness, replacement is cheaper than repeated repairs.
An algae-ridden tank is a health hazard. Your drinking water is only as clean as your tank.
Scale hides inside a tank for years — what the inside looks like decides retirement, not the manufacture date on the wall.
How It Works
Our process is simple, transparent, and designed to get your new tank live with minimal disruption.
We drain, disconnect, remove and dispose the old tank — down and away, not left at your curb.
New tank set, fresh floats and unions, properly plumbed with overflow and vent.
Line sanitized, fill-cycle tested before handover — same day if access is normal.
"New tanks are sanitized and pressure-tested before the line reconnects — no plastic taste and no surprise leaks in the first week."
— SIX7 Plumbing, Mount Lavinia
Frequent Questions
Everything you need to know about water tank replacement, pricing, and what to expect.
Old tank disposal?
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Tank Care Tips
Before Replacement
- • Check your overflow pipe monthly — constant running means a stuck float.
- • Inspect the stand for rust, lean, or cracking — a full tank weighs a tonne.
- • If algae returns within weeks of cleaning, the interior is beyond rescue.
After Installation
- • Test the float and fill cycle once a month — catches sticking early.
- • Keep the area around the tank clear for easy access during maintenance.
- • Schedule an annual tank clean to keep water quality high.