Technical / FAQ
Below are some of the most common questions we’ve received from our customers. If your question isn’t answered in these FAQs, please give us a call. We are happy to help.
Remember, care must be taken on any installation of the RapidAir compressed air system. Read all installation instructions and watch installation videos before starting.
How do I adapt to black pipe, copper, or between FastPipe and MaxLine?
There is not a direct adapter fitting to connect FastPipe directly to MaxLine, but you can connect them with pipe thread adapters. A local hardware store will have a variety of pipe thread fittings to help you adapt to any existing threaded system.
Note: Fastpipe and maxline fittings are not interchangeable.
How do I know which size to use?
The longer the distance the piping runs, the larger diameter of pipe you need. There is no benefit to changing the diameter of the pipe to a smaller diameter at the end of piping runs—doing that will decrease flow rate.
Use the Flow Rate Calculator to choose the correct diameter for your application.
My tank outlet size is smaller than the recommended pipe diameter
The thread size of the port on your air compressor tank does not determine the pipe size for your piping system. It is calculated with the length of your piping (building size) and air compressor CFM output. Even though the port on your tank may be small, the air is only traveling through a short distance, so the restriction is minimal. Air is only restricted over a long distance with small piping.
My air compressor maximum pressure is higher than the system rated pressure
All air systems should be fed at the start of the system with a regulator unit. The regulator is typically set between 90 to 110 psi. The regulator maintains constant pressure for your air tools regardless of what the compressor turn on and shut off limits are. The regulator will keep the system pressure below the rated maximum pressure of the kit. Most air tools are rated for a maximum of 120 psi, so it’s best to keep your system pressure below that limit.
How do I start my system at the air compressor?
Where should I put my filter regulator?
The most practical place for the filter regulator is close to the air compressor. This makes it convenient for mounting and plumbing the air system. To perform properly, It’s best to be at least 20 ft from the compressor. But some garages are not even 20 ft wide. While it might not perform at 100%, putting the unit next to the compressor will still work adequately.
What is a looped air system?
A loop is not always practical, as some building layouts just won’t allow it. We offset this by increasing the diameter of the piping to get more flow. Single air user shops typically don’t need a loop.
How do I know what size pipe thread I have?
Should I do a pressure test?
Are the compressed air systems sunlight and UV resistant?
MaxLine: tubing should be covered, fittings are ok.
Like any plastic product exposed to direct sunlight, it’s best to cover or paint the tubing to extend its working life.
When will my products ship out if I order today?
How much is shipping?
Can I get expedited shipping?
If I run out of fittings, can I buy them at a local store?
Are your products OSHA Approved?
OSHA does not approve any products for safety but does rely on the manufacturer for recommendations. Since we manufacture our piping for compressed air and have verified its performance, it is allowed.
OSHA has issued guidelines that PVC plastic pipe cannot be used for compressed air piping.
What is the difference between the Maxline and Duratec
Maxline is a great choice for compressed air and inert gas applications. It does not hold expensive agency ratings for food and beverage like Duratec.
What are the technical specifications for MaxLine?
What are the technical specifications for FastPipe?
What is the difference between Blue and Green?
Blue is used for Compressed air and Green is for inert gases.
What material are the fittings:
FastPipe Fittings up to 2” are fiberglass injected nylon.
FastPipe Fittings 3” to 6” are die cast aluminum and stamped steel.
What is the warranty?
What is the max pressure rating?
FastPipe: 190 psi
RapidAir Home Garage Kit: 150 psi
What is the temperature range of your products?
FastPipe -0ﹾF to 140ﹾF
RapidAir Home Garage Kit: -40ﹾF to 180ﹾF
What is the bend radius of the MaxLine?
3/4” Tubing: 6-8” Radius
1” Tubing: 10-12” Radius
2” Tubing: 36-48” Radius
What is the difference between the 1/2" RapidAir Home Garage Kit and the 1/2" MaxLine?
The MaxLine system uses compression fittings, which designate their measurement to the inside of the tubing. The MaxLine 1/2″ tubing measures 5/8” outside diameter x ½” inside diameter. For longer piping lengths, the MaxLine would offer more flow rate (CFM).
What style quick couplers or air chucks do I have?
See this chart for details to identify which style you have.
Can any of your products be buried underground or in concrete?
The FastPipe aluminum air piping and the RapidAir Home Garage Kit are not suitable for underground burial.
Can the products be painted?
Is the MaxLine the same as PEX tubing?
Why is there moisture in my air system? What can I do about it?
What is the difference between a refrigerated air dryer and filter dryer/trap?
For example, a simple $80 moisture trap/filter uses centrifugal force to remove the moisture and most water vapor will pass right thru the unit.
A $400 desiccant system works well, but uses a media similar to oil dry to catch the moisture. This media needs to be changed often. These units still allow some water vapor to pass through.
A refrigerated dryer operates like a de-humidifier and is electrically powered. It lowers the dew point of the air passing through it, which removes all the moisture and passes clean, dry air through it. A typical refrigerated dryer for a 5 hp compressor would cost $1300.
3/4” Maxline vs 3/4” Fastpipe
1” Maxline vs 1” Fastpipe
The 1” Maxline tubing does unroll harder than the smaller sizes and is more difficult to get straight for surface mounted systems. The compression fittings for the Maxline require more force to tighten. For on wall installations, we recommend the Fastpipe, as it is an already straight pipe, and as an easy install fitting system.
For long continuous runs with minimal fittings, Maxline is a good choice. If meticulous, straight, professional appearance is desired, always choose the Fastpipe.
1” Maxline is a great choice for direct burial, in wall or hidden installations. For in wall installation pictures of how to use the ¾” or 1” behind wall outlets see Maxline Installation photos