Nu-Calgon 4188-06 Freeze Protectant Blue 5 gal pail hvac control
Freeze protectant rated from -76 to 360 degrees Fahrenheit, supplied in a five-gallon blue pail
- Product colorBlue
- Freeze protection down to -76 °F
- Withstands temperatures up to 360 °F
- Blue colour for quick visual identification
- 5-gallon pail supplies multiple HVAC jobs
- Nu-Calgon brand trusted by HVAC professionals
Freeze Protectant 5 gal pail
Nu-Calgon 4188-06 Freeze Protectant Blue is a 5-gallon pail of blue liquid designed for HVAC system freeze protection. It operates across a temperature range of -76 degrees to 360 degrees Fahrenheit. The product is supplied new and ships free directly from the distributor.
HVAC technicians needing burst protection
This protectant suits HVAC professionals and maintenance teams requiring reliable freeze protection for hydronic systems and cooling loops in extreme conditions. Buyers who need a smaller container size or a different chemical formulation for potable water systems should look at alternative products.
Simple pour-and-fill installation
Installation involves pouring the protectant directly into the system according to the manufacturer’s dilution guidelines for the desired freeze point. The most common issue is incorrect mixing ratios, which can lead to insufficient burst protection or reduced heat transfer efficiency in the loop.
How it compares
Measured against everything we stock in Heating & Cooling Controllers, at today’s prices. Recalculated every night.
- Price $260.99
- Pricier than about 88% of the 1,762 comparable items (median $45.99).
Specifications
| Product | |
|---|---|
| Brand name | NU-CALGON |
| Product color | Blue |
Questions about this item
Does the Nu-Calgon 4188-06 require a specific HVAC system connection type to apply the freeze protectant?
The product is a liquid freeze protectant added directly to the system fluid; no special connection hardware is needed beyond standard fill or service ports.
Will the blue colour of this protectant stain older copper or brass fittings during service?
The blue dye is formulated for visual leak detection and does not stain metal fittings; it rinses clean during normal system flushing.
How can I verify the protectant is active after adding it to a system rated to 360 degrees F?
Use a refractometer or hydrometer to check the freeze point; the solution should test to the rated -76 degrees F protection level.
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