The drain pipe is to the far right and down, on the far side of the Carrot Cake Factory. Once you have a crowbar, and the blueprint from the window near the roof, you can enter the factory.
(see related question)
Go to Charlie's and give the lady her cat. She will give you a crowbar, which you can use to get into the Carrot Cake Factory. (There is a drain pipe on the water's edge.) Give it to the lady in the hardware store
The closed Carrot Cake Factory is to the right side of 24 Carrot Island. You will need a crowbar to get in through the sewer pipe at far right. (see related question)
Ratman is on Super Power Island. There is a large rat in the sewer entrance to the factory on 24 Carrot Island (climb up into the bypass pipe to elude him).
Use the crowbar to open the sewage pipe tp enter the warehouse on 24 Carrot Island.
The swamp or drainage area is to the right of the Carrot Cake factory, and is not an area you can enter. The only important location is the "drain pipe" which exits the factory. If you get the crowbar, this can be opened to allow you to enter the factory where the scheme is being perpetrated. (see related question)
Find the missing cat for the clerk at Carrot Surplus, and you get a reward : a crowbar. You can pry off the large drain at the right of the factory.
The only underground apparatus on 24 Carrot Island is the equipment stealing the carrots from the carrot farms. (They are used to make rocket fuel.) The operations of the evil Dr. Hare are all in the old Carrot Cake Factory to the far right of the island. You can get in through the sealed waste pipe if you have a crowbar. (see related question)
24 Carrot Island is the 4th island of Poptropica. It came out in June, 2008.
The mayor of the town on 24 Carrot Island will give you the Island Medallion when you complete the quest.
24 Carrot Island does not have a cockpit. 24 Carrot Island was released in 2008 and the main objective of the game is to stop the evil Dr. Hare from controlling Poptropica.
At the carrot factory.
24 carrot diner isn't in shark tooth it is in 24 carrot