The biggest cost factor is tank size since installation is relatively simple. A wet rainwater collection system costs $6,000 to $17,000 on average. In these underground systems, water remains ...

Today, we show you how to build a water filter tank to clean underground water for daily ... To solve this, we constructed a natural filtration system to purify it for safe use.

A septic tank is a large concrete or plastic underground tank that ... so as not to contaminate drinking water. A well-constructed and maintained septic system can provide adequate treatment ...

The tank's mixing system leverages high-pressure water for mechanical mixing without the need for a pump. A small control structure on top of the tank includes provisions for future re-chlorination.

But as global warming causes more severe weather, authorities are having to give the system a major upgrade. General view shows a pressure-adjusting water tank, part of a complex of underground ...