Strainers shall be capable of removing all solids of a size that would obstruct system components. Which statement best describes this requirement?

Strainers shall be capable of removing all solids of a size that would obstruct system components. Which statement best describes this requirement?

• A. True
• B. False
• C. Only for large solids
• D. Not specified

Answer: (A)

Strainers in foam-water systems are meant to protect the hardware by removing debris that could clog lines, nozzles, or foam-proportioning equipment. The requirement that they be capable of removing all solids of a size that would obstruct system components means the strainer must catch any debris large enough to cause a blockage, ensuring reliable operation and proper foam proportioning. There’s no allowance for only filtering the largest solids or for leaving unspecified debris—the standard demands effective filtration for anything that could obstruct critical passages. This helps explain why the correct statement is true, and it also highlights why regular inspection and cleaning are important to keep the strainer effective.

Strainers in foam-water systems are meant to protect the hardware by removing debris that could clog lines, nozzles, or foam-proportioning equipment. The requirement that they be capable of removing all solids of a size that would obstruct system components means the strainer must catch any debris large enough to cause a blockage, ensuring reliable operation and proper foam proportioning. There’s no allowance for only filtering the largest solids or for leaving unspecified debris—the standard demands effective filtration for anything that could obstruct critical passages. This helps explain why the correct statement is true, and it also highlights why regular inspection and cleaning are important to keep the strainer effective.