Closed System Treatment




Video Overview


System heating boilers can be troubled with water related problems such as scale formation, sludge and corrosion, which in turn can lead to other troublesome situations like foaming and surging. Proper treatment with a product like Winter-Treat can prevent these problems, enabling the steam boiler to perform at its designed capacity. Winter-Treat will buffer and balance water conditions, preventing both scale and corrosion while keeping the boiler free of sludge. Winter-Treat is a true multipurpose treatment.

Closed systems such as hot water heating boilers and even closed chilled water systems are easily plagued with corrosion problems in the absence of treatment. Winter-Treat contains all the necessary ingredients to buffer the water’s pH and balance, passivating the metal surfaces and inhibiting corrosion.

In addition to all its preventative abilities, Winter-Treat also cleans boilers that are already fouled with deposits and corrosion. If Winter Treat becomes slushy dump the liquid into the system, fill bottle with warm water and shake to get the crystals to dissolve. Then add to the system.

Packaging Size Part Number
1 quart bottle 4390-32
1 gallon bottle 4390-08


This product must be used in accordance to the following directions by HVACR professionals only.


  • Flush system with water and refill.
  • Add one quart of Winter-Treat for every 25 gallons of system water. For steam boilers, estimate 6-8 gallons per boiler HP. For hot water boilers, estimate 25 gallons per boiler HP.
  • Circulate through system for 1-3 hours. If it is a boiler, operate at standard steaming or heating conditions.
  • Drain, flush and treat with one quart for every 25 gallons of water.


  • Flush system and refill with water.
  • Add one quart of Winter-Treat for every 25 gallons of system water.

Literature Downloads

Download the product bulletin and other relevant literature here.


Download a low resolution file of the product label here.

SDS Information

Read and understand the product’s Safety Data Sheet for precautionary and first aid information.


Winter Treat; winter treat