I know this might be cheating, but you can always contact your local water company and tell them that you are planning to do some digging for some project (make up something plausible!) and ask if they will let you know where all your underground pipes are so you won't damage them while working on your project. I think there is a website also (maybe beforeyoudig.com or something like that). Anyway, they'll come out within a couple of days and mark everything (gas, water, etc) that is underground. They all use different colors, so find out from the water company what colors they'll use to mark which lines. In my area, blue is water into the house and green is waste water out of the house. Also, while this is not 100% guaranteed, locate the vent pipe on the roof of the house, and most times that vent pipe will be directly in line with the sewer drain line.
2 /one at the basement next to the bowie knife one near the corner near the elevator that takes u down to the base ment
The sensor is locate on the hose that connects to the air filter. Big Black hose (Wire is sticking out the hose) It cost $15 dollars at part store.
Right front bottom corner of the engine block. It is in a black plastic canister that unscrews and the filter cartridge is inside. where can I locate the oil filter?
While facing the engine, the filter is located left hand side of the firewall. it's black, cylindrical w/ 2 hoses sticking out of it. Very easy to locate and replace.
In Kino it is on the stage and in Five it is in the lab on the basement.
in the mansion, where you find the black space, jump down into i, you get to the basement by jumping from the platform furthest to the right
Black light.
Black
you go to a hole that's black and tell people about it.
Garnets and black rocks
Bleach
Probably Mastic