Discharging chlorinated water from storage tank overflows into a stormwater system or land can be toxic and harmful to plant and aquatic life. In order to address environmental concerns and potential regulatory penalties, Tideflex Technologies — a division of Red Valve Co. — has created an overflow and drainpipe assembly that prevents bird and rodent intrusion, increases tank security and completely removes chlorine and chloramine residual during overflow pipe and drainpipe discharges.

How it works

The Dechlorinating Overflow Security Assembly (DOSA) is constructed of dual Tideflex Nozzles and an internal adjustable dechlorination tube enclosed in an epoxy-coated steel or stainless steel body. 

During an overflow, the upper Tideflex Nozzle discharges an elliptically shaped jet down onto the fixed dechlorination tube. The adjustable internal tube can be rotated to different slot opening sizes to maximize removal efficiency and minimize tablet erosion. A calculated portion of the water passes through the tubes, making contact with the dechlorination tablets. 

Fast and slow dissolving dechlorination tablets are available for increased adjustability. The rest of the water deflects around the tubes. The water then combines in the blending trough to ensure it has been thoroughly mixed and dechlorinated prior to discharging out of the DOSA through the lower Tideflex Check Valve.

The DOSA is available in 2- to 24-inch sizes, with some larger sizes available. A lower flanged pipe spool is optional for in-line installations. 

DOSA is also available for horizontal overflow pipes. The assembly is low headloss, nonclogging and won’t freeze in cold weather. Overflow hydraulic analyses are available.

Red Valve Co. is a leading provider of valve products and engineering services founded on significant experience in elastomer design and manufacturing.  

412-279-0044  |  support@redvalve.com  |  www.redvalve.com