i'm using wireless system but not ADT but home from amway. no complaint thus far, does it job.
they did my house but all their work are subbed. overall OK lah but the grille material/workmanship and to mention the contractor were useless in my case. this was 2 years ago so they may have switched their subs.
make friends with your neighbour, quick and fast. the homeowners on my road has engaged a patrolling security for this due to increasing threat. my phase has only about 80+ homes so density is quite low and unless owners can pool resources, individual actions count for less.
i used to have this issue but solved this by using larger diameter pvc pipe. no need for pump.
good luck on defects. due to shoddy workmanship, the defects are now just showing up on my house right after the 18 months warranty period run up.
i used to think with sime at least you get quality but apparently nowadays even with money you can't buy quality.