What is the expansion rate of the nozzle?
This is a question with no simple answer! Most people want to know what the expansion ratio of the finished foam product from the nozzle is. Foam is kind of like hose; there are numerous manufacturers of it and they’re all a little different, thus offering different expansion ratios. Depending on the foam manufacturer, you will see expansion rates ranging from 7:1 clear up to 15:1. If a manufacturer tells you a specific expansion ratio for their nozzle ask them to provide you with the brand of foam, the expansion rate of the foam (low, medium, or high), and the conditions under which the tests results were obtained. Keep in mind there are conditions that require aeration of the foam such as polar solvent fires, protein foam, or securing spills. This being the case, we do not recommend using a combination nozzle without a foam attachment. The Vindicator does not require any attachments because it is an aspirating nozzle.
