The ball valve trigger has since been replaced with a valve from a sprinkler system, giving this high power PVC air cannon a fancy brass trigger. It looks awesome, and can kill a watermelon from ...

which are usually made of polyethylene plastic or PVC (polyvinyl chloride). Because you should expect to spend at least $2,500 on installing a lawn sprinkler system, you'll want to protect your ...

to clear a sprinkler system constructed of flexible polyethylene pipes, and 80 psi is needed to blow out rigid PVC pipes.