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Closed Loop System Treatment Chemicals

​Closed system water treatment chemicals are used to protect chill water and hot water recirculation systems from corrosion and scale formation along with biocidal control of microorganisms.
  • HVAC Chill Water Treatment Chemicals
  • HVAC Hot Water Treatment Chemicals
  • Closed Loop Corrosion Inhibitor Chemicals
  • Closed Loop Scale Inhibitor Chemicals
  • Hydronic System Water Treatment
  • Oxygen Scavenger Chemical
  • Corrosion Inhibitor Chemicals
  • Scale Inhibitor Chemicals
  • Sodium Nitrite Treatment
  • Tolyltriazole Treatment TTA
  • Organophosphonate Treatment Chemicals
The water treatment chemicals used to control corrosion in your closed loop are made from a variety of chemicals like sodium nitrite, tolyltriazole, organic polymers, dispersants and other water treatment chemistry to stop the formation of scale and prevent corrosion in water.

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AZ-CS-400P   Closed System Corrosion Inhibitor Treatment 5 Gallon Pails
Designed to be low cost, less toxic and ships by UPS further reducing your cost and time to receive products. 
Helps Prevent Corrosion in Closed Hot and Chill Water Systems


Product Description 
  • Unique blend of Nitrite/Borax based corrosion control compounds for iron and steel metal protection. AZ-CS-400P contains a visible red dye.
  • Incorporates an organic azole compound resistant to oxidizing degradation for corrosion control of yellow metal compounds, copper and brass.
  • Has dedicated iron oxide dispersants to retard rust deposits plugging lines and creating under deposit corrosion cells.
  • Forms a resistant protective barrier film on metal surfaces that helps prevent oxygen from attacking metal surfaces.
  • pH buffered with a borax for long term pH stability.
  • Utilizes a polymeric dispersant to help reduce Calcium Hardness scale from forming on heat exchanger surfaces.
  • Compatible with Ethylene Glycol/Propylene Glycol/GreenFrost-100 anti-freeze chemicals.

AZ-CS-400P  Application Rate and Control Parameters
  • AZ-CS-400P should be fed at a rate of 1 gallon per 100 gallons of water in the closed system.
  • Use Nitrite Test Kit P.N. CNTK3300-Z to test for AZ-CS-400P. The recommended test range is 800 - 1200 ppm as Sodium Nitrite.

Chill, Hot and Condenser Closed System Treatment: One Gallon Treats 100 gallons of water. Simple to test. Protects Iron, Steel, Brass and Copper. Contains a visible red dye. Ships by common carrier like UPS, FedEx or DHL. Non Regulated Material. 

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AZ-CS-402PD   Closed System Treatment
Helps Prevent Corrosion in Closed Hot and Chill Water Systems
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Product Description
  • Unique blend of Nitrite/Borax based corrosion control compounds for iron and steel metal protection. AZ-CS-402PD contains a visible red dye..
  • Incorporates an organic azole compound resistant to oxidizing degradation for corrosion control of yellow metal compounds, copper and brass.
  • Has dedicated iron oxide dispersants to retard rust deposits plugging lines and creating under deposit corrosion cells.
  • Forms a resistant protective barrier film on metal surfaces that helps prevent oxygen from attacking metal surfaces.
  • pH buffered with a borax for long term pH stability.
  • Utilizes a polymeric dispersant to help reduce Calcium Hardness scale from forming on heat exchanger surfaces.
  • Compatible with Ethylene Glycol/Propylene Glycol/GreenFrost-100 anti-freeze chemicals.

AZ-CS-402PD Application Rate and Control Parameters
  • AZ-CS-402PD should be fed at a rate of 1 gallon per 200 gallons of water in the closed system.
  • Use Nitrite Test Kit P.N. CNTK3300-Z to test for AZ-CS-402PD. The recommended test range is 800 - 1200 ppm as Sodium Nitrite.

Chill, Hot and Condenser Closed System Treatment: One Gallon Treats 200 gallons of water. Simple to test. Protects Iron, Steel, Brass and Copper. Contains a visible red dye.

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AZ-CS-ECO-GREEN  CST Closed System Treatment
Safe - Helps Prevent Corrosion in Closed Hot and Chill Water Systems
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Product Description
  • Super concentrated: 1 - 2 gallons treats 1000 gallons of closed chill, hot and condenser water.
  • Incorporates an organic azole compound resistant to oxidizing degradation for corrosion control of yellow metal compounds, Copper and Brass.
  • Has a dedicated iron oxide dispersants to retard rust deposits plugging lines and creating under deposit corrosion cells.
  • Forms a resistant protective barrier film on metal surfaces that helps prevent oxygen from attacking metal surfaces.
  • Is not depleted by oxygen and is suitable for open to atmosphere systems. 
  • pH buffered with a Borax for long term pH stability.
  • Less likely to be degraded by bacteria than other closed system corrosion inhibitors.
  • Can be used in systems currently treated with nitrite/phosphate/phosphonates based corrosion inhibitors.
  • Compatible with Ethylene Glycol/Propylene Glycol/GreenFrost-100 anti-freeze chemicals.
Applications: 
  • Closed recirculation heating and cooling loop treatment
  • Package boiler water treatment where water loss is at a minimum
  • Wood fired boiler treatment
  • Hydronic heating and cooling water treatment chemical
AZ-CS-ECO-GREEN   Application Rate and Control Parameters
  • AZ-CS-ECO-GREEN should be fed at a rate of 1 -2 gallons per 1000 gallons of water in the closed system.
  • Use O.P. Test Kit P.N. CNPK158 to test AZ-CS-ECO-GREEN.  The recommended test range is 25 - 40 total drops. 
  • AZ-CS-ECO-GREEN can be shipped UPS in small containers.
​Chill, Hot and Condenser Closed System Treatment. One Gallon Treats 500 to 1000 gallons of water. Protects iron, steel, brass and copper systems. Safe, Earth Friendly, Non-Hazardous, Green Chemistry

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​AZ-PC-ECO-GREEN   Pre-Clean Chemical
Safe to use, Protects While It Cleans Closed Loops, Boilers and Cooling Systems
Product Description
  • Cleans while it protects closed hot and chill water loops, boilers and cooling towers.
  • Functions by penetrating and reducing surface tension of dirt, mud, oil and rust deposits so that these deposits can be flushed out of closed loops, boilers and cooling systems.
  • Helps remove dirt, oil, mill scale, rust and debris from new and old piping and heat exchanger surfaces.
  • NOT Compatible with aluminum. Use Sentinel X400 for systems containing aluminum.
  • Safe to use, environmentally friendly, can be flushed to sanitary sewers.
  • Can be used in cooling towers as a pre-cleaning agent to help lift and remove deposits that are difficult to reach and physically remove.
  • Mixes quickly in cold and hot water and is safer to use than TSP or caustic detergent cleaners.
  • Especially effective in new construction piping to help remove cutting oils and flux from new piping.  Not intended for use in potable domestic drinking water lines.
  • Non hazardous, can be UPS shipped in 5-gallon containers 
ECO-Green - PreClean Application Rate and Control Parameters
  • ECO-Green - PreClean should be fed at a rate of 2 - 5 liquid ounces per 100 gallons of water in systems that are lightly fouled.  For heavily fouled systems or new construction piping, use 12 ounces to 1-gallon per 100 gallons of water.
  • Feed by hand, bypass feeder or chemical pump into the re-circulating water and allow to circulation for 6 -24 hours.  After circulation thoroughly flush until the water is clear.  Take precautions in heavily fouled systems where large amounts of dirt, scale and deposits may plug screens, small lines and heat exchangers.
  • Heating the water will increase the cleaning action of ECO-Green - PreClean.  Keep temperatures below 180 degrees Fahrenheit.

Sentinel Product Line - Scale & Corrosion Inhibitors


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Sentinel X100 Corrosion Inhibitor for Central Heating Systems - Perfect for Aluminum Boilers and Heat Exchangers - 5 gallon pail

​Sentinel X100 corrosion inhibitor for boilers provides protection for clean central heating systems against limescale and corrosion. Suitable for use in all types of indirect central heating systems to include aluminum heat exchangers. Sentinel X100 Scale and Corrosion Inhibitor Chemicals will extend the life of the hot water system, ensuring maximum efficiency of the boiler and minimizing fuel usage.
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KEY FEATURES
  • Heavy duty rust inhibitor
  • Protects against limescale and corrosion of boiler
  • Energy Saving Trust Recommended
  • TripleTech™ Anti-Corrosion Technology
  • Suitable for all system metals including Aluminum Boilers and Heat Exchangers
  • pH neutral formulation
  • Ensures optimum system efficiency
  • Suitable for hard, soft and artificially softened water
  • Helps prevent the formation of hydrogen gas
  • A simple test kit is available to check levels

Sentinel X100 treatment chemical is one of the only corrosion inhibitors that is safe to use on Aluminum Boilers and Heat Exchangers. 
Limescale and corrosion are the two main causes of central heating inefficiency, leading to radiator cold spots, boiler inefficiency, a noisy system and a multitude of other problems. Once a system has been prepared using one of the cleaners from the Sentinel cleaning range, it should be protected with Sentinel X100 Inhibitor to prevent the occurrence of limescale build up or corrosion.
Sentinel X100 Inhibitor has TripleTech™ Anti-Corrosion Technology, a unique blend of heavy-duty specialist corrosion inhibitors. Since central heating systems are normally made up of a variety of metals, each of these specialist inhibitors provides protection for different metals for unrivalled performance in protecting multi-metal central heating systems.

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​​Sentinel RAPID-DOSE X100RD Inhibitor
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Sentinel X100 Rapid-Dose Inhibitor has been formulated as a multipurpose treatment to prevent sludge build-up over time in heating systems. Designed for easy dosing to the system quicker than ever, the Rapid-Dose Inhibitor efficaciously helps break down rust and minerals. It thus protects your heating system by preventing the rust build up inside your pipes, boilers, and radiators. Sentinel RAPID-DOSE X100RD Inhibitor keeps your system running  longer with optimum performance. Ideal for use in all types of indirect heating systems, the X100RD Inhibitor prevents corrosion and limescale in steel, cast iron, copper, brass and aluminum. The product SKU is X100RD. 
Specifications of Sentinel RAPID-DOSE X100RD Inhibitor
Sentinel RAPID-DOSE X100RD Inhibitor is compatible for use with several metal substrates. Featuring an aqueous solution of inorganic and organic corrosion and scale inhibitors, X100RD is the market leading inhibitor available in the following specifications.
  • Weight: 1.5 LBS
  • Appearance: Clear colorless to pale green or pale yellow liquid
  • Specific gravity: 1.20 (20 degree Celsius)
  • pH Concentrate; 6.5 approximately
  • Freezing point: Minus 2.5 Degree Celsius
Features of Sentinel RAPID-DOSE X100RD Inhibitor
Sentinel X100 Rapid-Dose Inhibitor has several proven features, making it a highly sought-after solution for central heating systems. It assures hands-free dosing for the most difficult to access systems, whilst guaranteeing speedy discharge into the system in just 30 seconds. The other noteworthy features of this general purpose corrosion treatment solution are;
  • Heavy duty rust inhibitor with TripleTech™ anti-corrosion technology ensures optimum system efficiency.
  • This completely non-toxic and bio-degradable solution is suitable for all system metals.
  • It has a twist and dose system, which is extremely simple to dose, and there is no need to de-pressurize or cool the system to initiate the discharge.
  • This pH neutral formulation effectively removes sludge, limescale and other debris.
  • This non-staining solution with multiple heavy-duty inhibitors and pH stabilizers prevents pin-holing.
  • The solution is extremely easy and safe to handle, and there is no mess left out during dosing.
  • Suitable for hard, soft and artificially softened water, the solution helps prevent hydrogen gassing in all heating systems.
​Applications of Sentinel RAPID-DOSE X100RD Inhibitor
Giving the assurance of enhanced scale and corrosion protection, Sentinel RAPID-DOSE X100RD Inhibitor finds immense applications like maintaining pipework systems and similar other equipment. A few other application areas include:
  • Boiler
  • Heat Exchanger
  • Radiators
  • commercial and domestic LTHW systems
  • Light commercial and HVAC heating and cooling systems
  • Pumps

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Sentinel X400 System Restorer - 5 gallon pail
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Sentinel X400 High-Performance Heating System Restorer and Radiator Cleaner is specifically designed for cleaning older central heating systems. It is a non-acid treatment which restores circulation to radiators and pipework. It's ruthlessly efficient formula shifts built-up magnetite sludge, eliminating cold spots in radiators and restoring proper heat distribution. Use the Sentinel X100 to treat the system for limescale and corrosion.
KEY FEATURES
  • Restores systems suffering with circulation problems
  • Eliminates radiator cold spots
  • Prepares older systems for the installation of new components
  • Has a non-acid formula which does not cause pin-holing or leaks
  • Can be used in all types of indirect heating systems, including those containing aluminum
APPLICATIONS:
  • Central Heating System Cleaner
  • Aluminum Heating System Cleaner
  • Residential Radiator Cleaner
  • Indirect Heating System Cleaner
  • Boiler System Cleaner
  • Hydronic System Cleaner
  • Magnetite Cleaner
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Sentinel X400RD RAPID-DOSE High Performance Central Heating System Radiator Cleaner
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Sentinel X400 High-Performance Cleaner is specifically designed for cleaning older central heating systems. It is a non-acid treatment which restores circulation to radiators and pipework. Its ruthlessly efficient formula shifts built-up magnetite sludge, eliminating cold spots in radiators and restoring proper heat distribution. Use the Sentinel X100RD to treat the system for limescale and corrosion.
KEY FEATURES
  • Restores systems suffering with circulation problems
  • Eliminates radiator cold spots
  • Prepares older systems for the installation of new components
  • Has a non-acid formula which does not cause pin-holing or leaks
  • Can be used in all types of indirect heating systems, including those containing aluminum
APPLICATIONS:
  • Central Heating System Cleaner
  • Aluminum Heating System Cleaner
  • Residential Radiator Cleaner
  • Indirect Heating System Cleaner
  • Boiler System Cleaner
  • Hydronic System Cleaner
  • Magnetite Cleaner
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  • Home
  • Residential
    • Water Softener Systems
    • Combination Water Softener and Filtration Systems
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    • Drinking Water Systems
    • Well Water Systems
  • Plumbing Services
    • Tankless Water Heater Cleaning Services San Diego
  • Commercial
    • Bottleless Water Coolers
    • NaturalSof Pro Catalytic Core - No Salt - Scale Prevention Systems >
      • NaturalSof Pro - Cooling Water Applications
      • NaturalSof Pro - Decorative Water Fountains
      • NaturalSof Pro - Dishwasher Applications
      • NaturalSof Pro - Evaporative Cooler Applications
      • NaturalSof Pro - Heating Water Applications
      • NaturalSof Pro - Ice Machine Applications
      • NaturalSof Pro - Irrigation and Agricultural Applications
      • NaturalSof Pro - Metallic Valve Applications
      • NaturalSof Pro - Whole Building Potable Supply Applications
    • Water Treatment Chemicals >
      • Boiler Water Treatment Chemicals
      • Closed Loop System Treatment Chemicals
      • Cooling Tower Treatment Chemicals
      • Glycol and Heat Transfer Fluid
      • Reverse Osmosis Treatment Chemicals
    • Commercial Filtration Systems
    • Commercial Water Softeners
    • Commercial Reverse Osmosis Systems
    • Components & Consumables
    • Cooling Tower - Closed Loop - Steam Boiler Equipment
    • Food & Beverage Systems
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    • Disinfection Systems
    • Commercial Water Treatment Contact Form
  • Reviews
  • H2O University
    • Water Softener San Diego
  • City Directory
    • 3-Roots Community
    • Carlsbad Water Treatment Company
    • Hemet water treatment company
    • Murrieta water treatment company
    • Palm Springs Water Treatment Company
    • Palm Desert Water Treatment Company
    • San Diego Water Treatment Company
    • Temecula water treatment company
    • Winchester Water Treatment Company
  • Contact Us