According to the Centers for Disease Control (CDC), public health, (and plumbing is specifically mentioned), has added 25 years of life expectancy to Americans during the 20th Century.
At the beginning of the last century, sanitation and hygiene, e.g., public water supplies and waste disposal systems, were inadequate or non-existent in some communities as the population shifted from mainly rural living to cities and towns due to the creation of industrial jobs and immigration.
Plumbing and related shortfalls resulted in regular outbreaks of cholera, dysentery, tuberculosis, typhoid fever, influenza, yellow fever and malaria.
Lohmeyer Plumbing was established in 1936, so the business has contributed to residents' longevity for 77 years.