steel sewage pipe and fittings are the way to go for drinking water.
Stainless Steel sewage pipes doesn't rust, it lasts forever and nothing
leakes out into water.
Traditionally used materials for
underground drainage and sewage pipes such as clay, concrete or even iron
still hold a significant market share Sewage and drainage pipes are usually
not exposed extensively to sunlight. Most of the applications are
underground or in-house, and the pipes are exposed to sunlight only briefly
during their installation.