Unfortunately, many people in developed countries (particularly America) too often take things for granted. This is definitely the case with modern plumbing. Not only does having the advances of modern plumbing simplify our lives in a way, but it also preserves our lives. So many diseases break out in third world countries due to a lack of modern public safety standards, and plumbing is a big part of that. Let's take a look at a few ways you can exercise your gratitude for modern plumbing and even help make a difference in third world public safety.
Plumber Gratitude
Plumbers are the ones that make the magic happen, so you should definitely be appreciative towards them. By no means do you have to go out of your way to do something nice since you are already paying him, but what you can do is be the best customer you can be. That means being at your house when you say you're going to be there, have a pleasant personality, and just be easy to get along with. Ultimately he's just trying to do his job and help you out.
World Plumbing Day
The second way you can exercise your gratitude for modern plumbing is through the plumbing industry's holiday, "World Plumbing Day" (WPD). You can read all about world plumbing day here, but the gist of it is raising awareness for modern plumbing concerns. This can mean anything from social media presence to organizing group events, but if you feel inclined to get involved in the community and raise awareness for plumbing, WPD is the best way to do so.
Donate to Charity
Last but not least, donating to charity is a huge way in which you can make a difference. From the small amount of research I have done, I have not been able to find a charity that specifically aids public health in third world countries (tweet us if you can find one). However, there are many centralized donation websites that allow charities to post donation opportunities on their page. One I found, Global Giving, is a donation website with an international focus that even offers a "health" section of charities. If you are interested in making some kind of monetary donation towards public health in underdeveloped countries, I would highly recommend looking into doing so as every dollar you put in goes a long way.