Category: Articles

Choosing the correct relief valve needs preplanning

Pressure relief valves protect fire sprinkler system components by relieving excess system pressure from supply surges or temperature changes. Since the 2010 edition, NFPA 13: “Standard for the Installation of Sprinkler Systems” has required pressure relief valves to be installed on all wet pipe fire sprinkler systems. But picking the correct relief valve for a specific system does need a little preplanning. Knowing the desired static pressure of the system and reviewing the UL and FM Standards regarding the required operational characteristic of relief valves used on sprinkler systems for guidance, one can deduce the best rating for a relief valve on any system.

Preparing for Winter, Sprinkler System Maintenance

In freezing weather, dry and pre-action fire sprinkler systems have a major Achilles heel if improperly maintained—the auxiliary drains. Auxiliary drains, also referred to as low point drains or drum drips, are required on dry or pre-action fire sprinkler systems to collect condensation that forms in the pipes.

When improperly maintained, low point drains break and can cause major facility flooding. The cost to repair and reset the fire sprinkler system itself is negligible compared to the cost of water damage mitigation, potentially lost inventory, tenant interruption, increased liability, and increased insurance premiums.

Luckily, understanding attentive maintenance and other available solutions can help facilities prevent flooding caused by frozen low point drains.

How can you prevent corrosion and freezing in fire sprinkler systems? That has long been a question central to code requirements and new product development.

Recent innovations have presented a few possible answers to that question. Air vents, self-draining auxiliary drains in heated cabinets, and flood elimination devices, can protect fire sprinkler systems against the common pitfalls of corrosion and freezing.

Prevent Flooding in Your Facility

In freezing weather, dry and pre-action fire sprinkler systems have a major Achilles heel if improperly maintained—the auxiliary drains. Auxiliary drains, also referred to as low-point drains or drum drips, are required on dry or pre-action fire sprinkler systems to collect condensation that forms in the pipes.

When improperly maintained, auxiliary drains break and can cause major facility flooding. The cost to repair and reset the fire sprinkler system itself is negligible compared to the cost of water damage mitigation, potential lost inventory, tenant interruption, increased liability, and increased insurance premiums.

Luckily, understanding attentive maintenance and other available solutions can help facilities prevent flooding caused by frozen auxiliary drains.

As seen in NFSA Tech Notes:

This Special Edition of TechNotes is an annual reissue of the relevant information to winterizing dry pipe sprinkler systems. It was originally written by Mark Hopkins, P.E., Vice President of Engineering for the NFSA and updated by Kevin Hall, P.E., Manager of Engineering Research for the NFSA.