P-LOCK Urinal Lock is used to protect against valve thieves in public toilets. The P-LOCK come with a tamper resistant lock but just about any padlock can be used as well. These valves are made of brass and weigh four to five pounds. At five dollars a pound thieves have found them an easy target to remove and sell for scrap. The brass part can cost the victim upwards of three hundred to replace not to mention the inconvience of an inoperable toilet.