What is an antifreeze loop?
Antifreeze loops protect areas in a building or outside a building that are prone to freezing. A check valve isolates the anti-freeze loop from the rest of the fire sprinkler system. There is also a main drain and a fill cup to assist in the draining and refilling of the loop.
How do you fill an antifreeze loop?
For this reason, antifreeze loops are often installed on the areas of a freezer system that are prone to freezing. You can fill the antifreeze loop through the antifreeze fill cup. Replace the old antifreeze in your antifreeze loop to keep the sprinklers functioning properly.
What is NFPA 13D?
NFPA 13D is a residential sprinkler design standard focused on one- and two- family dwellings and manufactured homes. The intent is to provide an affordable sprinkler system in homes while maintaining a high level of life safety.
What is a antifreeze system?
antifreeze, any substance that lowers the freezing point of water, protecting a system from the ill effects of ice formation. Antifreezes, such as ethylene glycol or propylene glycol, commonly added to water in automobile cooling systems prevent damage to radiators.
What is a glycol sprinkler system?
Glycol is a combustible liquid that has a history of being used as an antifreeze solution for freeze protection in fire sprinkler systems. By September 30, 2022, existing antifreeze solutions must be replaced by alternative means of freeze protection. This marks the end of antifreeze in fire sprinkler systems.
Is glycerin a antifreeze?
Glycerol (also called glycerine): non-toxic and able to withstand higher temperatures than its counterparts, glycerol was the first antifreeze used in car engines. Sometimes called ‘nature’s antifreeze’, it can be made from animal and vegetable matter.
What is the difference between NFPA 13D and 13R?
NFPA 13 and 13D focus mainly on life safety and property protection, while NFPA 13R strictly focuses on the life safety aspect.
What is the maximum distance between sprinkler heads?
15 feet
The maximum spacing between two sprinklers is determined by the rating on the sprinkler head (usually 15 feet, but there are other spacing distances, depending on the manufacturer). The minimum spacing between two sprinklers is 6 feet.
What does an antifreeze tester do?
An antifreeze tester is a small, portable device that helps in the checking of antifreeze and coolant. It’s normally used by automotive owners to determine the freeze point of their vehicle’s antifreeze. In winter months, it may warn a motorist of an impending freeze; in summer, it may warn of boiling points.
How does an antifreeze loop system work?
AntiFreeze loops are filled with NFPA and Local Ordinance approved antifreeze solutions; either Propylene Glycol (PG) or Glycerin (GL). When a system is filled, the solution is pumped in either through the fill cup or drain area.
How does the anti freeze loop work in a fire sprinkler system?
Fire Sprinkler Antifreeze loop systems. Antifreeze loops protect areas in a building or outside a building that are prone to freezing. A check valve isolates the anti-freeze loop from the rest of the fire sprinkler system. There is also a main drain and a fill cup to assist in the draining and refilling of the loop.
What happens when antifreeze concentration is too high?
Samples must be taken at specified points and if the concentration is too low or too high, the system must be emptied and replaced with an acceptable solution. If the new approved solution is not sufficient to prevent the system from freezing, alternative methods of keeping the pipe from freezing must be implemented.
How is the specific gravity of antifreeze measured?
The specific gravity of each solution shall be checked using a hydrometer with a suitable scale or a refractometer having a scale calibrated for the antifreeze solution. If any of the samples exhibits a concentration in excess of what is permitted by 5.3.3.4, the system shall be emptied and refilled with a new acceptable solution.