An endless selection of plumbing parts. Whatever I need, I’ll find it here. Often I only have a vague idea of how I’m going to do something, but being able to search through these shelves and dry-fit parts together tends to unlock solutions I hadn’t even thought of.
Then there’s also the immense calm I feel being in a space where everything is neatly organized in its dedicated places.
It’s against the code to put any kind of joints in inaccessible locations. These pipes go inside a protective outer pipe in the ground under the house. They can only be replaced by attatching a new pipe to the old one and pulling it through.