Tag Archives: plumbing

The Relativity of plumbing

This is a post for my engineer friends. I took a shower this morning for the first time in days, because couldn’t figure this thing out.

This is my second stay in this compound; before I stayed in a flat that had a nice hot water system, I think from a tank on the roof, which was basically just heated by the sun. So my expectations (from here and elsewhere) led me to think that the left knob was hot.

This was further reinforced by the fact that it has special plumbing, going straight up. The right knob connects to the toilet and sink, and to another spiget off to the left –classic cold water plumbing.

Turning on the left knob, you get low pressure –still not uncommon for local hot water. But turning in the right at the same time (to mix hot and cold), the pressure guess funky, weird noises clank, and very soon there are sounds of spraying outside, like there’s a leak somewhere. Turn off the right knob, and it stops –so I did.

But the left knob by itself is just enough pressure to be disappointed, not really to shower. So I gave up, and got to work on other things, like analysing tone.

Later I noticed that there was no plumbing to a tank on the roof, as I had expected, so the left knob was coming from the attic, not a solar tank on the roof. If that was the case, then the hose spilling water in the ground should be the overflow for that tank.

So…. <drumroll\> if the right knob was causing overflow of the attic tank, then it should be that the left knob wasn’t hot, but rather attic water, and the right knob was city water.

This kind of system is important where water is scarce, and where city water cuts off a lot. That is, use the right (city water) knob most of the time, and when it doen’t work, turn it off and use the left (attic water) knob. Then when city water comes back on, open both knobs and fill the tank in the attic (just until you hear the overflow spilling out the window).

So once I figured out that normal usage was just using the right knob, I got decent pressure. Heat would have been nice, but it’s hot enough here that cold water wasn’t really a problem. And it was nice to finally figure out how to shower. 🤪