Why PEX for fire sprinkler systems?
Why PEX? NFPA 13D-approved for use in multipurpose and standalone fire sprinkler systems, PEX has been shown to be an effective alternative to CPVC and copper pipe due to its easy installation and durability. Both characteristics allow contractors and builders to meet tight production schedules.
How do you install a sprinkler system with PEX?
Run your 3/4 inch PEX underneath/through any holes you bored using water hose. Run your PEX all the way through the trench until it completes a circuit at the beginning of the trench. Using the PEX Cutting tool cut where you want a sprinkler to be placed. Place a 3/4 inch plastic clamp on either side of the cut pieces.
Is PEX pipe good for irrigation?
There are different types of irrigation. Some of the popularly known ones are surface irrigation, Drip irrigation, localized irrigation, and sprinkler irrigation, to name a few. PEX piping for irrigation systems is a good option due to cost, reliability, ease of installation, and flexibility.
Can I use PEX pipe to fill in a trench?
Use a garden hose and a length of PEX pipe to direct water to "bore" through the soil and continue the trench. This should not damage the buried wires. Run 3/4 inch PEX along inside the trench you have dug. PEX is flexible and will bend around corners easily, unlike most PVC.
Can you use PEX for outdoor sprinkler system?
One of the benefits of PEX is that it is easily adapted after it has been installed, creating a custom sprinkler design based on your lawn needs. You are able to modify existing sprinkler heads easily using the same techniques as when it was first installed.
Can you use PEX for sprinkler lines?
The good thing about PEX is that it can be used in any environment. Contractors are not barred from using PEX in an underground sprinkler system in any location and many times they end up using it for its versatility and cost effectiveness.
Where should you not use PEX?
You can't install PEX in high heat areas like near recessed lighting. This also means you can't connect PEX directly to a hot water heater, but you can use a connecting material to do this. PEX is semi-permeable, which means liquid can enter the pipe. When it comes to safety, PEX isn't antibacterial.
Can you use PEX for commercial fire sprinkler system?
Materials that are most commonly used for fire sprinkler systems are PVC, steel, copper and PEX.
What type of pipe is used for lawn sprinkler systems?
The two piping types most commonly used for irrigation systems are white PVC (polyvinyl chloride) and “black roll pipe ” (polyethylene).
Is PEX pipe fire rated?
Fire-Resistant Construction: PEX-a piping is rated for up to three-hour fire assemblies per ASTM E119. Listings include assemblies for combustible wood-frame construction as well as non-combustible steel-frame and concrete construction.
Why is PEX not allowed?
Rodent Risk Factors While pest experts don't know whether rodents chew through PEX to get to the water inside or simply because it's there, PEX and rodents can be a dangerous combination. Local building codes in some communities may not permit the installation of PEX if rodent infestations are common.
How long will PEX pipes last?
50 yearsPEX: Due to its flexibility and durability, PEX piping should last at least 50 years. PVC / CPVC: Under typical conditions, these pipes should last up to 100 years. Keep in mind that PVC pipes are often used for drainage because extreme heat can damage them.
Can rats eat through PEX pipe?
PEX Pipe Is Vulnerable Rodents Chewing Through PEX Pipe is a common problem in our area. It doesn't matter how old your home is, if you have an attic, you need to watch for rodent damage to PEX Pipe or PVC. If you're hearing rustling noises coming from the attic, it's time to do an inspection.
Can plastic pipe be used for the installation of fire sprinklers?
Certain CPVC plastic pipe and fitting systems listed to system standard UL 1821 can be used to supply water to fire sprinklers for low-rise residential occupancies according to installation standard NFPA 13R and to supply light hazard occupancies according to NFPA 13.
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 are the different types of fire sprinkler heads?
There are 4 common varieties of fire sprinkler heads: pendent, upright, sidewall & concealed - each with their own particular use.
Can plastic pipe be used for the installation of fire sprinklers?
Certain CPVC plastic pipe and fitting systems listed to system standard UL 1821 can be used to supply water to fire sprinklers for low-rise residential occupancies according to installation standard NFPA 13R and to supply light hazard occupancies according to NFPA 13.
Can you connect PEX to PVC?
And fortunately, connecting PVC to PEX is easy to do. Whether you're looking to repair or expand your plumbing, adding PEX to your existing system is accomplished using a threaded fitting. In general, a fitting comes with one half to attach to existing pipe, and another half that fits on the PEX pipe.
Is PEX cheaper than PVC?
PVC is less expensive to purchase than PEX, although it usually will cost you more in labor. - Outdoor safety. PVC is fine to use outdoors, even above ground - you just need to cover the exterior of PVC piping with a coat of water-based paint.
What is the best size pipe for a sprinkler system?
What Size PVC Pipe is Used For Irrigation? One of the most commonly used sizes of PVC pipe for irrigation systems are 13mm, 19mm, and 25mm. For irrigation laterals, PVC pipes that are at least ¾” thick (19.05mm) are preferred since those that are ½” thick (12.7mm) clog much faster and often.
When Should You Water Your Lawn?
If your local ordinances allow, water your zones on different days. Finally, water in the very early morning or late at night. This will decrease the amount of water lost to evaporation.
How to stop sprinklers from popping up?
If you find that the sprinklers aren't receiving full pressure, such as not popping up fully, try lower flowing sprinkler heads. I purchased Hunter MP rotators to replace all of my sprinkler heads due to low flow issue. They flow much less water, increasing pressure across the line. Hunter MP rotators will need to be used longer, but will be less likely to cause excessive run off. More water will get into the soil. They also spray evening along their entire water throw. Even though there is a special tool to change the arc, it is possible to use a flat head screwdriver to change distance and water arc.
How to snap plastic PEX clamps down?
Push the clamps over the pipe with the plastic PEX inside and clamp it down using pliers. It should look like the series of pictures below. It will be easier to use a larger set of pliers or tongue and groove pliers ("Channellocks") to snap the plastic PEX clamps down.
How to put sprinklers in PEX pipe?
Preparing to Add Sprinklers. Using the PEX Cutting tool cut where you want a sprinkler to be placed. Place a 3/4 inch plastic clamp on either side of the cut pieces. Place a 3/4 x 3/4 x 1/2 inch tee in both openings of the PEX pipe. Push the clamps over the pipe with the plastic PEX inside and clamp it down using pliers.
What size PEX elbows are needed for a sprinkler?
1/2 Inch PEX x MNPT Elbows (Ensure you purchase the same MNPT size as the sprinkler head, typically 1/2 or 3/4 inch. One needed for every sprinkler.)
What is head to head sprinkler coverage?
This means that each sprinkler should be able to throw water far enough to reach, or be close to, the next sprinkler.
What is the limiting factor for large lawns?
Zoning Your Lawn Sprinkler System. One of the limiting factors for large lawns is the number of sprinklers your water pressure is able to support . Larger lawns will need to be broken down into watering zones. Each zone should be watered at a different time.
Why PEX?
NFPA 13D-approved for use in multipurpose and standalone fire sprinkler systems, PEX has been shown to be an effective alternative to CPVC and copper pipe due to its easy installation and durability. Both characteristics allow contractors and builders to meet tight production schedules.
What is PEX piping?
First used in water distribution systems in the 1970s, PEX — an acronym for crosslinked polyethylene — has quickly grown to be the most-installed piping product for potable plumbing systems in residential applications nationwide, more than copper and CPVC combined. It is even starting to take hold in commercial plumbing and hydronic heating and cooling applications, as well.
Why use PEX tubing in sprinkler systems?
The use of PEX tubing in residential fire sprinkler systems is growing due to its versatility, flexibility and durability. Photo credit: Uponor North America
Why is PEX used in cold expansion?
Another benefit of PEX is the connection method. Because of its shape memory that ensures the pipe will always return to its original shape after being expanded, the pipe works very well with cold-expansion fittings. These fittings use the shape memory of PEX to create strong connections that hold tight with 1,500 pounds of radial force.
How to make a fitting?
To make a fitting, the installer simply places an expansion ring on the end of the pipe and then expands the pipe and ring with an expansion tool. Once expanded, the installer inserts a larger-diameter fitting. As the pipe and ring shrinks back down to its original shape, it creates a strong, leak-resistant connection.
Why bend a flexible pipe?
First, since the flexible pipe is available in long coil lengths, an installer can simply bend the pipe to make a change in direction without having to stop and cut in a fitting. This saves time, reduces materials costs, and limits potential leak points in the system.
Why do you need to expand pipe before installing fittings?
Best of all, because the pipe must be expanded before inserting the fitting, it eliminates dry-fit issues. For installers who have ever missed cementing or soldering a dry-fitted connection, this is a game-changer.
Which Pipe Is Best For The Sprinkler System?
Are you considering replacing or installing plumbing lines for your sprinkler system? Then, you must beware that plastic pipes made of PEX are competing and maybe overpassing PVC and copper in popularity.
Is PEX Good For Sprinkler Systems?
Before everything else, it is important to note that PEX is suitable for use in both standalone and multipurpose sprinkler systems. PEX has proved to be a better alternative to copper and CPVC pipes since it features an easy installation and is highly durable.
Is PEX Good For Outdoor Use?
The climate of your surroundings dictates the pipe’s size to use, whereas the success and service span of any pipe is determined largely due to its outdoor conditions.
Is PEX Or PVC Better For Underground?
It is important to know the best material to use depending on the application when it comes to the piping system. However, it can be quite challenging to determine the best piping for your system all by yourself.
Conclusion
If this post has raised your interest in the benefits of PEX for sprinklers and irrigation, check out www.ppfahome.org or www.plasticpipe.org for more information. These two sites are among the most valuable websites for readers who wish to learn more about PEX piping systems and other materials.
Flexible PEX tube has become extremely popular in residential wet fire sprinklers – but what about dry and preaction set-ups?
We were recently asked whether PEX tube can be used in a dry fire sprinkler system. A life safety maintenance professional cited an example of a dry system with PEX that was questioned by the local fire marshal. It’s a good question:
PEX is a great option for wet residential applications – but not dry or preaction systems
PEX has gained massive popularity in residential fire sprinkler systems for good reason – it’s durable, easier and cheaper to install than many other options, resistant to corrosion and freeze damage, uses fewer fittings than CPVC or metal, and water passes through PEX tube with much less friction than metallic pipe.
What is a multipurpose sprinkler system?
Multipurpose systems are those that combine regular household potable water supplies, both hot and cold, with the sprinkler system. This type of installation does not require the use of backflow preventers or check valves and no standard inspections or maintenance is required. A multipurpose system is less expensive to install because it relies on the same common water supply.
What is PEX pipe?
PEX pipe is approved for use in fire sprinkler systems, under the National Fire Protection Association (NFPA) 13D code and UL 1821. NFPA 13D covers sprinkler systems that operate with standard water pressure, without a connection for the fire department. The fire sprinkler system must also be part of a multipurpose system.
Can you use PEX in a fire sprinkler system?
While many states will allow the use of PEX in stand-alone sprinkler systems, it is not approved under NFPA 13D. To meet building code requirements, fire sprinkler systems must normally be installed by a licensed plumber.
Can sprinklers be installed before drywall?
Sprinkler systems should be installed before drywall ceilings, but can be connected directly to the ceiling. Sprinkler heads are connected with a special PEX adapter and the use of crimp rings or cinch clamps. Choices in sprinkler heads are available that allow the sprinkler to be concealed behind a drop-down plate when the installation is completed above a finished ceiling.
Is PEX pipe corrosion resistant?
The use of PEX offers an affordable alternative to other plumbing systems and makes the installation process significantly easier. PEX pipe is not susceptible to free zing, resists corrosion and less fittings are required.
Do you need a cold water connection for PEX?
A cold water connection must be available to begin running the PEX pipe. This should be done with a manifold for ease of installation. Using a manifold with separate shut offs allows the fire sprinkler system to be turned on when all connections are complete and turn off if changes are needed. The sprinkler supply line should be installed ahead of any supplies to individual plumbing fixtures.
What Is PEX Piping?from lawncaregrandpa.com
It is a cross-linked polyethylene formed into a bendable (flexible) pipe that has in recent years been replacing some applications of co pper piping.
When Should You Water Your Lawn?from dengarden.com
If your local ordinances allow, water your zones on different days. Finally, water in the very early morning or late at night. This will decrease the amount of water lost to evaporation.
How to stop sprinklers from popping up?from dengarden.com
If you find that the sprinklers aren't receiving full pressure, such as not popping up fully, try lower flowing sprinkler heads. I purchased Hunter MP rotators to replace all of my sprinkler heads due to low flow issue. They flow much less water, increasing pressure across the line. Hunter MP rotators will need to be used longer, but will be less likely to cause excessive run off. More water will get into the soil. They also spray evening along their entire water throw. Even though there is a special tool to change the arc, it is possible to use a flat head screwdriver to change distance and water arc.
How to snap plastic PEX clamps down?from dengarden.com
Push the clamps over the pipe with the plastic PEX inside and clamp it down using pliers. It should look like the series of pictures below. It will be easier to use a larger set of pliers or tongue and groove pliers ("Channellocks") to snap the plastic PEX clamps down.
How to put sprinklers in PEX pipe?from dengarden.com
Preparing to Add Sprinklers. Using the PEX Cutting tool cut where you want a sprinkler to be placed. Place a 3/4 inch plastic clamp on either side of the cut pieces. Place a 3/4 x 3/4 x 1/2 inch tee in both openings of the PEX pipe. Push the clamps over the pipe with the plastic PEX inside and clamp it down using pliers.
What size PEX elbows are needed for a sprinkler?from dengarden.com
1/2 Inch PEX x MNPT Elbows (Ensure you purchase the same MNPT size as the sprinkler head, typically 1/2 or 3/4 inch. One needed for every sprinkler.)
What is the limiting factor for large lawns?from dengarden.com
Zoning Your Lawn Sprinkler System. One of the limiting factors for large lawns is the number of sprinklers your water pressure is able to support . Larger lawns will need to be broken down into watering zones. Each zone should be watered at a different time.
CPVC or PEX in home fire sprinklers: which thermoplastic is the winner?
Schedule 40 steel used to be the material of choice for fire sprinkler pipes until the mid-1970s, followed by thinner steel pipe and a push toward copper. 1985 saw the introduction of a non-metallic material that is still widely used today: Chlorinated polyvinyl chloride (CPVC).
A look at CPVC in home fire sprinklers
CPVC is manufactured by taking standard polyvinyl chloride (PVC) and “adding chlorine … in a water slurry or fluidized bed chlorination process” which is “initiated by ultraviolet light.” Adding this element gives the material much better resistance to corrosion and the ability to withstand higher temperatures than PVC.
A look at PEX in home fire sprinklers
PEX is made by chemically crosslinking polymer chains of polyethylene molecules, which makes the original substance stronger and more resistant to chemicals, abrasion, and heat. PEX tubes vary in size from about 3/8” to 4”.
So, which is better?
Opinions may vary, but it’s basically a push. A homeowner can’t go wrong with either material in a fire sprinkler system.
