Do you mean Pex or Peck's? If it is the former, it depends on which system you want to become certified in? Check with the local plumbers and Plumbing wholesale houses.
When you are building any new home you should already have a general contractor. He will be more than capable to do the HVAC installation.
First, you must choose what type of contracting you want to do - where you go to get certified varies with the type of work. You can register for general Government Contracting at https://www.bpn.gov/ccr/default.aspx.
If he can't he shouldn't be a general contractor
Yellowpages is a great resource to find a contractor for general liability insurance in Mobile, Alabama. The website contains contact information for multiple contractors.
Anyone who does work for a general contractor and is not a direct employee of that contractor is a sub-contractor. Regardless of who sets the price. The subcontractors work within the contract set between the general contractor and homeowner. Hence sub-contractor.
General Contractor Lic.
So they can work as a general contractor and not have to work for someone else.
An insured contractor is a contractor who carries a Commercial General Liability Insurance Policy.
That means he is an unlicensed general contractor. He has not set up a bond or registered with the state licensing board. Complaints in your state would not be readily available.
a general contractor is who is license with a general building license (b) and is permitted to take jobs in whole a contractor or specialty contractor are the contractor that specialized in one trade only and are permitted to take only special trades on the job for example an electrical contractor can only take electrical job
general contractors differ in that they are familiar with all aspects of the building process, from vacant land all the way through the processes to complete a home, office building and so forth. a contractor will and can be hired BY a general contractor to accomplish a certain aspect of the process of construction. general contractors can roughly be compared to a general practitioner. a contractor, to a doctor who only specializes in one area of practice
you don't require a specific license, but you need a general license if you are a building contractor. you have to be certified for construction as well as pass the OSHA examinations