up vote 0 down vote accepted. I discovered that the chimney/pipe/whatever you want to call it is not held together by anything. I simply pushed the wood stove out of the way and then the pipe came loose. I bought a cap from Lowes and capped it off.
In hair tests, the marijuana detection time can range from three months up to three years from the last time that you used a drug. Most labs will only look at the last 90 days. Hair grows on average half an inch per month, so 1.5 inches of hair corresponds to about 90 days.
Urine testing is able to detect marijuana usage more effectively than a blood test beyond a week. If you suspect someone is abusing marijuana it may be best to use an alternative drug testing method, such as urine testing or hair follicle testing. How Long Does Marijuana Stay in Hair? Hair follicle testing is often considered one of the most accurate methods of drug testing.