What are the marking intervals for 5-inch hose measurements?

• A. 10, 20, and 30 foot intervals
• B. 50, 100, and 150 foot intervals
• C. 25, 50, and 75 foot intervals
• D. 5, 10, and 15 foot intervals

Answer: (C)

Marking intervals for 5-inch hose are set at 25-foot increments. This size of hose is used for long lays and high volumes, so you need a measurement unit that’s precise enough to track progress without cluttering the hose with too many marks. A 25-foot spacing provides quick, reliable references—you can count marks in multiples of 25 to know exactly how much hose has been laid or how much remains, which is especially helpful for pump calculations and planning the next steps.

Choosing 25 feet fits well with common LDH practices, where lines are often deployed in longer overall lengths (like 50 or 100 feet) and you still want a simple way to break those runs into manageable portions. The other options aren’t as practical: 10/20/30 would be too coarse for lengthy stretches, making it harder to estimate precise lengths; 50/100/150 lacks the finer granularity needed for quick adjustments; 5/10/15 would require many marks and slow down rapid deployment.