The Bulldog Antiblast nozzle from Enz USA was designed specifically to prevent blowing toilets while jetting in residential areas. Cleaning sewer lines near home installations brings the risk of pressure equalization through toilets and traps when negative pressure arises ahead of the nozzle, or when excess pressure follows the nozzle, if the installations were not correct or venting is not working properly. The nozzle prevents this unpleasant side effect and cleans in all directions. 888/369-8721; www.enzusainc.com.