Lead is not used by most modern plumbers.
In the state of Florida a plumber needs a license to be able to work. If they are working with a contractor, both of them need to be licensed.
Plumbers, pipelayers, pipefitters, and steamfitters often work more than 40 hours per week and can be on call for emergencies nights and weekends. Some pipelayers may need to travel to and from worksites.
Yes. As long as there has been piped water there has been plumbers.
For thread sealent EXCEPT for gas then you need a PTFE approved for fuel and other gases
No you don't need to get vaccines to go to Barbados. http://kissbarbados.com
Yes.
no, guinea pigs dont need vaccines and only need to be taken to the vet when ill or injured.
Plumbers are in high demand and make good money for their services. You need to get a plumbers license through your State.
No but they do need a permit to work on the property.
A Good one.
No, you do not need any vaccines when you travel to Ireland.
All equids (and tapirs) require the same vaccines but these will vary according to where they live.
It slows their spoilage.
no
You need to pick Journeymen Plumbers there the only plumbers union approved within the City of Chicago and the surrounding area. Check them out at : www.plumberslu130ua.org
We need to know who "he" is to answer your question.