Trailer drain line was backing up. Ran spartan 300 down line 4 times. Pulled back what appeared to be paper towels all 4 times. Standing water was still inside pipe. Inserted blow-bag into pipe. And cycled blow-bag for 20 minutes. Pulled out blow-bag and inserted camera. Found what appeared to be sections of broken pipe inside of drain. Note: Line is currently draining but recommend not using drains until repairs are made. Locates were called into area. Thank you for choosing CPI plumbing and heating!