Why Eco Toilet Install FAQ is a Must-Have for Plumbers
As cities push for sustainable plumbing upgrades—and as clients become more conscious of their water use—demand for eco toilet installs, especially dual flush toilets, low flow models like Caroma, has soared. Yet even the best eco toilets require correct installation, makeshift troubleshooting, and clear communication with customers. No plumber wants a call-back. No client wants a toilet that leaks, sweats, or “ghost-flushes.”
This FAQ covers common water-saving toilet install concerns, advanced diagnostics for plumbers, warranty and supplier answers, and peer/user review insights.
All Caroma technical details reference Eco-Building Products’ supplier page:
Caroma at Eco-Building Products
Common Concerns With Eco Toilet Installations
1. Toilet Sweating/Condensation Around the Base
Key Causes & Fixes
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Cold Water, Humid Room
LCaroma Dual Flush Toilets never completely flush all of the water in its tank down the toilet. The water remaining in the tank tempers the incoming water when refilling the tank resulting in a tank water temperature that is high enough that a dew point will not occur eliminating the probability of sweating or condensation.
Fix: Improve powder room ventilation, insulate toilet tank, or install Caroma’s insulated tank models (certain suites offer this option for humid regions).Screenshot-2025-11-01-at-12.56.33-PM.jpg
2. Water Appears Around the Base
Key Causes & Fixes
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Failed Wax Ring or Seal
If installers overtighten bolts or misalign the gasket, leaks occur.
Fix: Reset toilet and use a new wax ring/gasket; ensure a level, debris-free flange. -
Hairline Cracks
Sit or move the bowl harshly during install, and even durable Caroma toilet porcelain can crack unnoticed.
Fix: Inspect bowl exterior carefully; replace if necessary.
3. Weak or Incomplete Flush (Low Flow Issues)
Key Causes & Fixes
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Improper Water Level
Like all toilets, Caroma Dual Flush Toilets rely on precise tank volume for each flush. If adjuster screws or float settings are off, water won’t generate enough pressure.
Fix: Tune to manufacturer’s specs; Caroma supplies clear indicators for water level inside tank.Screenshot-2025-11-01-at-12.56.33-PM.jpg -
Clogged Rim Jets or Trapway
Hard water or debris can block rim holes/trapway, impeding stronger flushes.
Fix: Use a flexible brush or soft plumbing snake to clear rim jets. -
Sewer Gas Smell
Persistent odor usually indicates an unsealed trap (due to low water level) or a venting problem.
Fix: Refill/prime P-trap or check building vent stack for obstructions.
4. Unusual Flush Sounds or Vibration
Key Causes & Fixes
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Fill Valve "Hammer"
Quick closing valves make pipes bang, especially in metal pipes.
Fix: Add arrestor to supply or opt for Caroma’s quiet-closing fill valves (widely available). -
Whistling or Squeal
Result of pressure or faulty gaskets.
Fix: Reseat or replace gaskets; ensure fill valve and float operate smoothly.
Fixing Leaks & Flush Issues
Diagnosing Flush Problems
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Use colored dye in the tank to detect slow leaks into the bowl (phantom flush).
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Perform a “bucket test”—pour in a gallon of water rapidly and see if it empties fully. If yes, clog is in the vent (not bowl); if not, inspect rim/trapway.
Leak Solutions and Preventive Maintenance
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Always check installation torque; over-tightening cracks porcelain, under-tightening leads to wobbles/leaks.
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For low-flow toilets in older homes with uneven floors, use shims under the base to ensure solid, level placement.
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Recommend supply line upgrades (braided steel, not old flex hoses) for all water-saving toilet installs.
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Replace old shutoff valves if corroded or leaking.
Handling Persistent Low Flow
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If all adjustments fail, check supply pressure (should be above 20 PSI, ideally 40–60 PSI for eco Caroma toilets).
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Remove and descale fill valve, flapper, and all bowl ports.
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For installations in regions with low gravity, recommend pressure-assisted Caroma toilet options.
Caroma Supplier FAQ
1. Will Caroma Toilets Fit My Existing Plumbing?
Most Caroma toilets are designed for standard 12” rough-in common in North America. Unique mounting kits adapt Caroma to older 10” or rare 14” drainpipes—ask your supplier for the right kit.
2. Are Caroma Toilets Compatible With All Septic Systems?
Yes—Caroma’s low-flow, high-efficiency dual flush system is suitable for municipal and most residential septic systems. Their rapid, complete flush disperses waste more quickly than “trickle” or slow-fill toilets.
3. How Do Dual-Flush Buttons Work?
Caroma dual flush toilet actuator buttons are color-coded/labelled. The half flush is designed for liquids, the full flush for solids. Mechanism is highly reliable, but flush rods should be checked for alignment during install.
4. What is the Warranty Period?
Most Caroma toilets come with a 10-year warranty on bowl/tank and a 3-5 year warranty on internal flush parts. Always register toilets at installation for full coverage.
5. Are These Models ADA-Compliant?
Caroma offers both standard and ‘easy height’ (ADA-compliant) models. “Easy Height” refers to toilets 17-19” from base to seat, suitable for accessible washrooms.
6. Which Cleaning Products Are Safe?
Any non-corrosive cleaner is fine. Avoid bleach/chlorine pucks placed inside tanks or any acid-based cleaners, as these degrade seals and mechanisms over time.
Sustainable Plumbing in Practice
Choosing a Caroma toilet isn’t only about water—it's about building longevity, health, and local code support. The right low flow toilet can:
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Lower the risk of sewer backups (less water means less demand on old city lines).
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Qualify for water saving rebates and green certifications.
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Satisfy eco-conscious homeowners and commercial property managers.
Pro Outreach and Ongoing Support
Keeping this FAQ handy helps plumbers deliver better, faster installs, smoother fixes, and smarter sustainability recommendations to any client—building a better reputation (and fewer call-backs) across your plumbing career.
For troubleshooting, installation updates, and field-specific questions, always reference latest Caroma specs at the supplier hub: Caroma at Eco-Building Products