There are no green wheels.
(see related question)
Turn the red wheel on top of the last ledge.
When you face ratman and his rats and flies, climb to the red wheel at the upper right, which will dump sludge on Ratman. Jump quickly between the rats. Then avoid his flies to jump over to him and cuff him.
Go left and lower the water level with the red wheel. Then raise it again until you can reach the door at the upper left (do NOT turn the wheel there!). Go through the door to find Ratman.
Beneath the restroom at City park, cross the sewer to reach the first red wheel, which lowers the water. Then find the other two that raise it. When you can reach the control room door at upper left, do not click the red wheel there : just open the door.
You have to jump past the three at the upper right, to reach the red wheel there. This dumps sludge on Ratman and the flies attack you. Jump past them to the large center pipe, and then over to Ratman.
The fourth wheel is in Tanglevine Jungle on the second island(you need the levitation power to get across).Hope I helped! :)
There are three red wheels that lower and raise the water in the sewer. But the one you use in the Control Room is at the upper right, and you have to jump past three rats to reach it.
In the sewers on Super Power Island, Ratman is guarded by rats and stinging flies. When you find him, go right and jump the rats to reach the final red wheel at upper right. This dumps sludge on Ratman and the flies. Now they will chase and sting you. Go far right, then run back left and quickly climb the BIG pipe in the middle, from which you can jump to Ratman. The flies are always right behind you.
Super Power IslandTo reach the control room, turn the red wheel at the right, which lowers the water. Then the red wheel at far right, then the red wheel in the middle right, and you can swim to reach the door.Also:Early PoptropicaClimb back up past the spiders. If you have the glow stick from the well in Early Poptropica village, you can take the tunnel left into the caves under Poptropica Towers. You will find the Golden Egg there.
There is no such tool (it is a myth perpetuated by cheat sites). The way to capture Ratman is to reach the control wheel at the upper right. Once you are past the rats, turn the wheel to dump sludge on Ratman. Now the flies will leave him and attack you. Avoid them and jump over to cuff Ratman.
You have to make a series of three jumps between the rats to reach the red wheel at the upper right (to dump the sludge on Ratman). Then evade the flies and jump from the middle raised pipe over to cuff Ratman.
You go over to the big platform that is on the ground and jump over the rat. When you get to the right side, turn the red wheel but watch out for the flies. After you turn the wheel, poop will come out over Ratmans head out of the sewer.