The quality of a spray foam application will always be dependent on properly functioning SPF equipment, regardless of how many years experience an applicator might have. And yes, equipment maintenance is as necessary as it is time-consuming. Heated hoses are critical to the consistent flow of material, which translates to a uniform spray and ultimately, better foam. However, the material that runs through the hoses can leave buildup over time. As such, hose lines need to be flushed out periodically to keep them flowing smoothly.
SPF Depot’s Pat Gilliland put some perspective on hose flushing procedures, and was quick to point out that buildup issues aren’t equivalent for the A-side hoses and B-side hoses. “It’s really only the A-side you’ve go to do that to; you just don’t have those problems with the B-side,” he said. “I had my rig for a couple years before I sold it, and I flushed out the A-side, but I never did the B-side.”