Pipeline Hydro-test utilizes water pumps, sand filters and water storage tanks to remove sediment, rust and other particulates

When a New Jersey hydrotest contractor needed pumps, tanks and a filtration system, their first choice for a complete, one-stop Solution was Rain for Rent. 

The contractor was hired by a natural gas facility to test a new LNG storage tank.  The tank was to be hydrotested with water pumped from a nearby lake and needed to be filtered, utilized, filtered again and then returned to the lake in an environmentally-safe condition.

In order for the hydrotest water to meet EPA discharge requirements, the contractor needed a filtration system that could process 5 MGD (3,500 gpm) and remove sediment, rust, and other fine particulate matter.

Rain for Rent, New Jersey designed, installed, and operated a filtration system consisting of eight 48-4 sand media filters.  Seven of the filters were used to filter the outgoing hydrotest water directly from the newly constructed LNG tank, then backwashed into four 21,000 gallon bi-level Worksafe™ tanks. 

The eighth 48-4 was connected to a 6-inch SA-DV-150 Power Prime™ pump that was plumbed to the middle valve of the four tanks.  As the backwash water filled the tanks, a pump was activated, processing the backwash water through the media filter.  By drawing from the middle valve, the bottom few feet of the tanks were used as storage for the heavy particulates which were removed during backwashing. 

All of the filtered water was discharged to an on-site "modu-tank".  The contractor continually pumped down the "modu-tank" and discharged the filtered water into a series of settling ponds prior to final discharge into the Chesapeake Bay. 

Over 25 million gallons were processed during the five-day period.  Discharge samples from Rain for Rent's filtration system ranged from 2.05 to 1.79 NTU clarity.