How often should foam concentrate strainers be visually inspected?

How often should foam concentrate strainers be visually inspected?

• A. Annually
• B. Quarterly
• C. Biannually
• D. Monthly

Answer: (B)

Strainers in a foam concentrate system are there to trap debris before the foam reaches the proportioning equipment. A visual inspection helps catch signs of clogging, wear, or damage that could restrict flow and affect foam discharge performance. Checking these strainers on a quarterly basis provides a balance: it’s frequent enough to catch developing blockages early, but not so frequent that it becomes wasteful. If debris is found, or if the system has been recently used, contaminated, or stressed, clean or replace the strainer and reseat it properly. Monthly checks are usually more frequent than necessary for standard operation, while biannual or annual checks risk allowing debris buildup to go unnoticed.

Strainers in a foam concentrate system are there to trap debris before the foam reaches the proportioning equipment. A visual inspection helps catch signs of clogging, wear, or damage that could restrict flow and affect foam discharge performance. Checking these strainers on a quarterly basis provides a balance: it’s frequent enough to catch developing blockages early, but not so frequent that it becomes wasteful. If debris is found, or if the system has been recently used, contaminated, or stressed, clean or replace the strainer and reseat it properly. Monthly checks are usually more frequent than necessary for standard operation, while biannual or annual checks risk allowing debris buildup to go unnoticed.