Up-Flo
®
Filter Operation and Maintenance Manual
Hydro International
(Stormwater), 94 Hutchins Drive, Portland ME 04102
Tel: (207) 756-6200 Fax: (207) 756-6212 Web: www.hydro-int.com
Operation
Introduction
The Up-Flo
®
Filter operates on simple fluid hydraulics. It is self-
activating, has no moving parts, no external power requirements and
is fabricated with durable non-corrosive components. Personnel
are not required to operate the unit and maintenance is limited to
periodic inspections, sediment and floatables removal, Media Pack
replacement and Drain Down Filter replacement.
Pollutant Capture
The Up-Flo
®
Filter is designed to operate as a “treatment train” by
incorporating multiple treatment technologies into a single device.
Trash and gross debris are removed by sedimentation and screening
before they are introduced to the filtration media, preventing surface
blinding of the filter media. The Up-Flo
®
Filter is a wet-sump device.
Between storm events, oil and floatables are stored on the water
surface separate from the sediment storage volume in the sump (see
Fig.2). The high-capacity bypass siphon acts as a floatables baffle to
prevent washout of captured floatable pollutants during high intensity
events.
Reduced Clogging
The Up-Flo
®
Filter has been designed to minimize the occurrence
of clogging and blinding. The Up-Flo
®
Filter employs a unique Drain
Fig.2 Pollutants captured in the Up-Flo
®
Filter.
Outlet
Module
with
Bypass
Hood
Filter
Module
Floating
Debris
Settled
Solids
Drain
Down
Filter
Angled
Screen
Page | 4
Down Filter that allows the water level in the chamber to drop below the filter media between events. The Drain Down Filter mechanism
creates a reverse flow that flushes captured pollutants off the surface of the Media Bag, helping to prevent blinding. By allowing the water
to drain out, the Drain Down Filter also reduces the weight of the Media Bags. This makes the bags easier and safer to remove during
maintenance operations.
Overflow Protection
The Angled Screens are designed to prevent ragging and blinding. The Angled Screens are situated below the Filter Modules, sheltering
them from the direct path of the influent. Coarse debris settles in the sump before the runoff flows up through the screens, protecting
them from blinding. In the unlikely event of a blockage, the high capacity siphonic Bypass Hood is designed to convey high enough flow
to minimize the risk of large storm creating upstream flooding.
Good Housekeeping & Best Practices
Good housekeeping practices upstream of the Up-Flo
®
Filter can significantly extend Media Bag life. For example, sweeping paved
surfaces, collecting leaves and grass trimmings, and protecting bare ground from erosion will reduce loading to the system. Media Packs
should not be installed in the Filter Modules until construction activities are complete and site stabilization is effective.
Damage Due to Lack of Maintenance
Delayed maintenance would result in clogged Media Bags and/or blinded Angled Screens. In that situation, the Up-Flo
®
Filter would go
into bypass and there would be no treatment of the incoming stormwater. Because the Bypass Weir can easily convey all of the flow to
the Outlet Module, there would be no lasting damage to the system. Replacement of the Media Bags and removal of sediment from the
sump would restore the Up-Flo
®
Filter to its original treatment efficiency. Establishing and adhering to a regular maintenance schedule
ensures optimal performance of the system.
