Plumbing in general is never cleaned and it isn't a problem as the water is moving. The main issue with water tanks is the water is stagnant and in warm/hot cl

Plumbing in general is never cleaned and it isn't a problem as the water is moving. The main issue with water tanks is the water is stagnant and in warm/hot climates ideal for life. Nowadays it's very easy to add a UV light to the interior of your water tanks to keep the interior sterile.