1-1/2 in. x 10 ft. 330-PSI Schedule 40 PVC DWV Plain End Pipe

Probably not. This pipe is 10 feet long and fairly heavy for a spear. It is also pretty blunt at the end. You will only make the boar madder than he already is if you throw it at him. Don't even try it for domestic boar hunting.

I would need to know more information to answer this question. Ten foot sections can be added together to make it longer and is suitable for extending into your backyard buried under the freeze line.

it will bend. Its not solid.

No, for extended periods sun and wind stress would prematurely bust and cause damage to tarp in the wind.

Too many missing variables to give a definitive answer. It will bend, it may snap the pvc by the galloping of the string lights by wind. Personally I would recommend aluminum pipe for fencing. There are stronger and will hold up to wind. There are two places to look at Home Depot, one is in the lumber area and is 2 3/8 fence pipe. Two different heights the second place is in the electrical area in 2" conduit pipe. That is my reccomendations.

This pipe is capable of running the water off the main line for irrigation applications only (not domestic water distribution), but it is difficult to find fittings of this size that are rated to handle the pressures involved in water distribution (because of water hammer). Why do you need 1-1/2 in pipe to run your side line? Is this for a commercial irrigation system? Most residential and small multi-family irrigation systems can be run in 1 in PVC or smaller, and the valves, heads, and emitters are commonly available for this type of system. Please remember to be sure that ALL components of the system (pipe, fittings, valves, etc.) are rated for the pressures that you will encounter in your system. It will cost more as you install the system, but it will save you on maintenance and repairs as the years go by. Good luck.

Because the pipe itself is rated at 330 PSI, it can be used for compressed air as well as pressurized liquids, but the problem is finding pressure rated fittings in this size. Most of the time, Schedule-40 PVC fittings larger than 1 in are intended for use in DWV (drain/waste/vent) applications, and not guaranteed for ANY significant pressure AT ALL. This size of pipe would create a significant reservoir of high pressure air, just inside the pipe itself, which means you could assemble your system and have one of the fittings suddenly tear off of the pipe, and that would be REALLY DANGEROUS at 120 PSI (a normal compressed air supply pressure). If you want to save money on piping for compressed air, you might consider using 1/2 in Schedule 80 PVC (the grey stuff) and make sure that all the fittings are rated for at least your maximum supply pressure. Using a rated pressure vessel to store the air, and just running it to the quick connects using the PVC is an approach I've seen used before in various applications. Myself, I choose to run compressed air in 1/2 in sweat copper in order to be more confident that I won't have any blowouts, but it is significantly more expensive. Good luck.

Yes it must be secured propelly

No

Absolutely not! That would be a terrible accident guaranteed to happen. This pipe is neither strong nor resilient enough for any application which depends on weight bearing capacity. It will buckle when bent significantly, because the PVC polymers are not cross linked. Vaulting poles are laminated fiberglass or carbon fiber, and can be bent to almost touch ends, then spring back with enough force to propel the vaulter over (hopefully) the bar. If, on the other hand, you want to drain the wash water from the sink in your bathroom, this is a great way to go. It will likely pass Code in whatever jurisdiction you're working in, and is cost-effective for the task. Please always work with your local Building Department to comply with Code for your situation, and don't jump into anything unprepared to clear the bar (figuratively speaking, of course).