Tideflex® Technologies • 600 N. Bell Ave., Carnegie, PA 15106 USA • 412-279-0044 • Fax 412-279-7878 • www.tideflex.com

Dechlorinating Overflow Security Assembly (DOSA)Innovative System For Water Tank Overflow Pipes

Discharging chlorinated water from storage tank overflows onto land or into a stormwater system can betoxic and severely harmful to plant and aquatic life. Inorder to address environmental concerns and potentialregulatory penalties, Tideflex® Engineers have createdan overflow pipe assembly that prevents bird/rodentintrusion, increases tank security, and also removeschlorine and chloramine residual during overflow discharges. The Dechlorinating Overflow SecurityAssembly, or DOSA, is constructed of dual Tideflex®

Nozzles and an internal adjustable dechlorination tubecompletely enclosed in a powder coated steel body.

Technical Data

• Completely removes chlorine and chloramineresiduals during overflow events.

• Non-clogging.

• Adjustable internal tube maximizes removal efficiency and minimizes tablet erosion.

• Fast and slow dissolving dechlorination tabletsavailable for increased adjustability.

• Dual Tideflex® Nozzles provide security againstpotential malicious intent to tank.

• Dual Tideflex® Nozzles provide favorable internalclimate to preserve life of dechlorination tablets.

• Keeps water system compliant with existing or forthcoming discharge regulations.

• Prevents birds, rodents and cold air from enteringtank.

• Low headloss.

• Overflow hydraulic analysis available.

• Available with lower flanged pipe spool.

• Sizes 2˝-24˝, larger sizes available.

• Available for horizontal overflow pipes.

• Will not freeze in cold weather.

• Optional sensor available to signal overflow event.

• Optional sensor available to signal tablets needreplaced.

DOSA Features and Benefits:

PATENT PENDING

Overflow Pipe

Recirculation Zone

UpperTideflex® Nozzle

LowerTideflex® Check Valve

Mixing Chamber

Dechlorination Tubes

Blending Trough

Drain Holes

Optional LowerPipe Spool

The DOSA Assembly During Testing(Transparent Side for Illustration Only,

Final Assembly Has Four Welded Steel Sides)

Adjustable Tube

Dechlorinating Overflow Security Assembly (DOSA)Innovative System For Water Tank Overflow Pipes

Technical DataPATENT PENDING

During an overflow event, the upper Tideflex® Nozzle discharges an elliptically-shaped jet down onto the dechlorination tube. A calculated portion of the water passes through the tubes, making contact with the dechlorination tablets. The rest of the water deflectsaround the tubes. Both then combine in the blendingtrough to ensure all water has been thoroughly mixedand dechlorinated prior to discharging out of theDOSA through the lower Tideflex® Check Valve.

Adjustable Internal Tubes withDechlorination Tablets Installed

Perforated Screen and AdjustableInternal Tubes

Finished Assembly Prior to Shipment

Water StorageTank

Pipe Support

OverflowElevation

OverflowPipe

DrainPipe

TankShell

DechlorinatingOverflow Security Assembly (DOSA)*Patent Pending*

Tank Floor

Tank Foundation

Ground, Drain Pipe or Vault

Tideflex® Technologies • 600 N. Bell Ave., Carnegie, PA 15106 USA • 412-279-0044 • Fax 412-279-7878 • www.tideflex.com