Puzzle:Pine Fell Water Plant

After entering Pine Fell Water Plant, exit the stairs and turn right. Pass the two big pipes and the first door on the right and go to the second door. there you will find on the floor the Keycard.



After entering in the building, go to the computer room (second floor). On one of the desks there is a key.



Go to the computer on the left and will see this:



Open the light-blue pipe on the left from pools:



Go to the first floor and find pool 1. It is empty:



Press the red button bellow the green light to fill it up:



Find the way outside, go to the stairs from where you came and on the right there is a small hut - Chlorination room. Turn it on:



Go back to the second floor and sit again in PC chair. Open both Chlorination valves:



Go to the first floor and turn on both A1 and A2 valves:



Again, go to the PC on the second floor and open Red pipe 2:



Exit to outside and go to the two big pipes. Open the red valve (red pipe 1):



Find a blue handle for the blue pipe outside (blue pipe 2) and close the pipe:



Back to the Computer to shut off Blue pipe 1:



Go to the first floor and close pipes A3 and A4:



Go to pool 4 which now is filled, press the red button next to it to drain it. In the empty pool you will find a key. Grab it. Push again the red button to fill up the pool.



Next, open both A3 and A4 pipes:



Go outside and open the blue pipe valve (blue pipe 2):



Back to the Computer, open blue pipe 1:



Now all valves on the monitor must be green. Next to pool 4 is the next needed door:



In the basement on one of the walls there is a place for a handle - Do Not Use it!



Next to that handle, there is an important key:



At the first floor there is a door which can be opened with the key we just found:



Next go to the stairs and head to the basement:



And here is the level exit: P.S.: It is strongly suggested that you save your game before jumping!



There is a hidden cave behind the entrance of the plant, in which there is a note and a geocache. The entrance can be found here (crouch!):