week 10- plumbing

Plumbing is a system most people never think about until something goes wrong, but interior designers still have to think about every aspect of it because it decides where rooms can go and how they work. Plumbing is what brings water in and takes waste out. The part I had not thought about in detail was the three kinds of water. Potable water is safe to drink, gray water comes from sinks, bathtubs, and washing machines, and black water is waste water that contains sewage. Seeing them separated made it clear that not all used water has to be treated as waste.

Where the waste goes was also new to me. Buildings connected to a municipal system send it to a sewer treatment plant, while others use a septic tank or even wetlands. The Living Building Challenge Water Petal and the Loom House case study showed that a building can be designed to handle its own water responsibly instead of just using it up. Toilets are the single largest use of water inside a building, so they are the best place to start saving. High efficiency toilets use less than 1.28 gallons per flush, and new legislation keeps pushing them to use less than older ones. Urinals also show a trade-off, since low water urinals reduce water use by about 85 percent.

For the different water-saving fixtures, the dual-flush toilet was my favorite. It gives the user a choice of one flush when less water is needed and two when more is needed, so the savings come from a simple mechanism and not from asking people to change their habits. For a commercial example, I liked automatic faucets, especially the light powered ones, because the sensor runs on light and needs no electricity. They also save water by only running when someone is there. My last example was gray water reuse. Water from sinks and showers can flush the toilet, which turns something that would be thrown away into a second use. Tankless water heaters and composting toilets also fit this idea, since one heats water on demand without storing it and the other needs no water at all, which makes it useful in rural locations without municipal water and sewer.

The part that connects most directly to our job is how plumbing shapes the layout. Fixture placement, required and recommended clearances, stacking plumbing, chase walls, the slope of waste pipes, and traps all affect where a bathroom or kitchen can be located and how much space it needs. Ventilation and accessible bathrooms also have to be planned from the start, not added at the end. Even small choices like energy-efficient hand dryers, which reduce the need for paper towels, add to the overall impact.

What these examples have in common is that the best plumbing designs do more than supply and remove water. Each one handles a practical need like clearances, access, or fixture placement, and it also reduces the water a building uses. That connects back to the idea that good design takes technical knowledge, an understanding of systems, and responsibility for resources working together with creativity.