Part No. THS-008 · Water Systems
Tankless Water Heater Descaler Kit
Spec Sheet
| Part No. | THS-008 |
| Department | Water Systems |
| Material | Food-grade citric acid — safe for stainless-steel and copper heat exchangers |
| Contents | Submersible pump recirculates solution — cleans tube faces, not just inlet |
| Dimensions | 3/4 in. hose adapter — connects to most residential tankless drain ports |
| Compatibility | Isolation valves included — no need to source separately |
| Service | Drain bucket included — contained procedure, no overflow surprise |
| Notes | Recommended once per year — restores flow rate after lime scale build-up |
| Field 7 | Ships from our U.S. fulfillment center via USPS Priority Mail |
| Field 8 | 30-day return window from the date received |
On the Job
- Bath and kitchen upgrades
- Pressure and flow corrections
- Tankless and tank heater maintenance
An annual descaling kit for tankless water heaters that restores full heat transfer and rated flow rate without a service-call fee. Food-grade citric acid dissolves calcium carbonate and magnesium scale in the same chemistry the manufacturer endorses, and the included submersible pump recirculates the solution through the heat exchanger for 45 minutes so chemical action reaches every tube face. The kit comes with isolation valves, a 3/4 in. hose adapter, and a drain bucket so the entire procedure stays contained on a bathroom floor — no disassembly beyond opening the heater's drain port.
Shipping: $7.95 flat rate — USPS Priority Mail (USA only)
Returns: 30 days from date received
Ships from: 4711 34th St. N. Suite F, St. Petersburg, FL 33714
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Common Questions
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Orders leave our Florida warehouse within 1-2 business days via USPS Priority Mail — $7.95 flat rate, USA only.
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Returns are accepted within 30 days of the date received. Email support@trustedheatingsystemshub.com with your order number.
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Tankless Water Heater Descaler Kit
Product Overview
An annual descaling kit for tankless water heaters that restores full heat transfer and rated flow rate without a service-call fee. Food-grade citric acid dissolves calcium carbonate and magnesium scale in the same chemistry the manufacturer endorses, and the included submersible pump recirculates the solution through the heat exchanger for 45 minutes so chemical action reaches every tube face. The kit comes with isolation valves, a 3/4 in. hose adapter, and a drain bucket so the entire procedure stays contained on a bathroom floor — no disassembly beyond opening the heater's drain port.
Key Features
- Food-grade citric acid — safe for stainless-steel and copper heat exchangers
- Submersible pump recirculates solution — cleans tube faces, not just inlet
- 3/4 in. hose adapter — connects to most residential tankless drain ports
- Isolation valves included — no need to source separately
Why You'll Love It
- Engineered for real residential and commercial water pressures
- Compatible with standard U.S. fitting sizes — minimal adapter hunting
- Ships from our U.S. fulfillment center within 1-2 business days
- Backed by a 30-day return policy if it's not the right fit on arrival
Ideal Applications
Installation & Usage
- Shut off water at the nearest isolation valve before starting install.
- Apply PTFE tape clockwise to male threads — 3–5 wraps for potable lines.
- Tighten fittings hand-tight, then an additional 1/8 to 1/4 turn with a wrench — no more.
- Pressurize slowly and check for weep points before closing the wall or vanity.
What's Included
- Tankless Water Heater Descaler Kit — 1 unit as described
- All connecting hardware and adapters included (see spec sheet for sizes)
- Installation instructions compatible with U.S. plumbing standards
- Shipped flat-rate via USPS Priority Mail
Care & Maintenance
- Flush aerators and shower heads monthly to prevent mineral buildup.
- Test pressure regulators annually — downstream pressure should hold within ±3 PSI of setpoint.
- Descale tankless heat exchangers once per year using the SKYSHALO kit for consistent flow rate.
- Inspect leak alarm sensors quarterly and replace 9 V batteries annually.
Technical Notes
- Food-grade citric acid: 99.5 % assay, pH 2.2 in full-strength solution.
- Pump flow rate: approximately 2 gal/min at 50 PSI — adequate for 50–100 gal. exchangers.
- Recommended pump runtime: 45 min; do not exceed 90 min per descaling cycle.
