Design Flaws

If you don't have substantial formal education or firsthand experience, you should avoid getting too creative with very basic water infrastructure. Try hard to follow the instructions you trust and if you need to alter it, do some research. 

My second apartment as a young adult was an inexpensive one-bedroom apartment in Texas. I don't know if they were in violation of building codes and didn't bother to try to find out, in part because this was before the internet made it quick and easy to look stuff up.

Legionaire's Disease is named after an initial deadly outbreak that killed a bunch of members of the American Legion. They eventually concluded it was probably due to the bug getting into the air conditioning system. 

So there was a pipe in my one-bedroom apartment that dripped water into the bathtub, probably condensation from the air conditioner. And I was aware this was potentially a means to get Legionella. 

So I never took a bath in that apartment.  Showers only.

And I had a baby while living there and only bathed him in the sink. He didn't really need a full sized bathtub as a newborn and this one-bedroom apartment had a generous countertop area on both sides of the sink, so it was easy to bathe him at the sink and we moved when he was about 5 or 6 months old.

This was not a fancy or expensive apartment, but it also wasn't a dive or poverty housing. Yet it had a design flaw that was potentially a source of deadly infection and it never became an issue for me in spite of having a compromised immune system and newborn infant because I'm fairly educated about medical stuff, in part because my mom had wanted to be a doctor, so medical stuff was a lifelong interest of hers.

Water systems in the US have a lot of problems, like old lead pipes causing lead poisoning and poorly maintained pipes and hot water heaters spreading Legionella which is best known for causing Legionaire's Disease but also causes a less deadly, chronic infection called Pontiac Fever. 

I'm trying to provide information that will allow for access to good quality water in remote areas and primitive conditions. That marriage of high standards and limited resources means that there's a narrow range of solutions that really meet those water quality standards. 

The US isn't even reliably meeting those standards everywhere even in a supposedly developed country. So think twice and do your research before you decide to just slightly tweak something. 

It may become a disaster waiting to happen because abundant clean water is critical to "progress" and there is a long, long history of civilizations rising as they solve water supply issues in desert areas and falling again when those systems deteriorate and the descendants of the people who made them work "forget" why some things were done the way they were done.