ADS HDPE Water Quality Unit (WQU)

Trap hydrocarbons and remove total suspended solids to improve stormwater quality

The ADS HDPE Water Quality Unit is your solution for trapping hydrocarbons and total suspended solids (TSS) from stormwater. Two weir plates act as trapping devices as the storm water flows through surface drainage structures and into the water quality unit. This structure also incorporates the use of a bypass system, which prevents re–suspension of captured solids by diverting water flows greater than 'first flush'.

ADS HDPE Water Quality Units are durable, lightweight structures specifically designed for fast installation and easy maintenance. Made from high–density polyethylene N–12® drainage pipe, these units are resistant to abrasives and chemicals typically found in storm water and surrounding soils. And when site conditions require higher levels of treatment, the ADS Water Quality Unit becomes an integral part of a multi–tiered approach known as the treatment train.

ADS HDPE Water Quality Units come in 16 standard models offering 36"-60" (900-1500 mm) diameters and 20' (6m) or 40' (12m) configurations, with longer lengths available upon request.

  • Light weight
  • Horizontal design for minimal depth excavation
  • 80% TSS removal
  • 80% oil and grease removal
  • Short order lead time

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Product Information

ADS HDPE Water Quality Units offer efficient solutions for stormwater treatment, removal of TSS, oils and heavy metals, and fast, easy installation.

ADS HDPE Water Quality Unit (WQU)

Product Number 3620WQA 3640WQA 3620WQB 3640WQB 4220WQA 4240WQA 4220WQB 4240WQB 4820WQA 4840WQA 4820WQB 4840WQB 6020WQA 6040WQA 6020WQB 6040WQB
Diameter in. (mm) 36 (900) 36 (900) 36 (900) 36 (900) 42 (1050) 42 (1050) 42 (1050) 42 (1050) 48 (1200) 48 (1200) 48 (1200) 48 (1200) 60 (1500) 60 (1500) 60 (1500) 60 (1500)
Length ft. (m) 20 (6) 40 (12) 20 (6) 40 (12) 20 (6) 40 (12) 20 (6) 40 (12) 20 (6) 40 (12) 20 (6) 40 (12) 20 (6) 40 (12) 20 (6) 40 (12)
Inlet Size in. (mm) 10 (250) 10 (250) 10 (250) 10 (250) 12 (300) 12 (300) 12 (300) 12 (300) 12 (300) 12 (300) 12 (300) 12 (300) 15 (375) 15 (375) 15 (375) 15 (375)
Outlet Size in. (mm) 10 (250) 10 (250) 10 (250) 10 (250) 12 (300) 12 (300) 12 (300) 12 (300) 12 (300) 12 (300) 12 (300) 12 (300) 15 (375) 15 (375) 15 (375) 15 (375)
Treated Flow Rate cfs (L/S) 1.5 (42) 2.38 (67) 0.7 (20) 1.6 (45) 1.75 (49) 3.66 (104) 0.86 (24) 1.83 (52) 2.26 (64) 3.94 (112) 1.13 (32) 2.39 (68) 2.95 (84) 6.23 (176) 1.47 (42) 3.12 (88)
Sed. Vol. ft.3 (m3) 65 (1.8) 137 (3.9) 65 (1.8) 137 (3.9) 83 (2.3) 175 (5.) 83 (2.3) 175 (5.) 116 (3.3) 245 (6.9) 116 (3.3) 245 (6.9) 183 (5.2) 385 (10.9) 183 (5.2) 385 (10.9)
Oil Vol. ft.3 (m3) 30 (0.8) 63 (1.8) 30 (0.8) 63 (1.8) 38 (1.1) 81 (2.3) 38 (1.1) 81 (2.3) 55 (1.6) 115 (3.3) 55 (1.6) 115 (3.3) 87 (2.5) 184 (5.2) 87 (2.5) 184 (5.2)
Sieve Size 140 140 200 200 140 140 200 200 140 140 200 200 140 140 200 200

Downloads

Submittal Packages

Water_Quality_Units_Standard_Models
Drainage_Handbook_ADH1-Specifications 07-18-18
Water_Quality_Unit_WQU_20ft_(Product_Detail_501_02-16)-Model
Water_Quality_Unit_WQU_20ft_36in_(Product_Detail_503_02-16)-Model
Water_Quality_Unit_WQU_20ft_48in_(Product_Detail_507_02-16)-Model
Water_Quality_Unit_WQU_20ft_60in_(Product_Detail_509_02-16)-Model
Water_Quality_Unit_WQU_40ft_(Product_Detail_502_02-16)-Model
Water_Quality_Unit_WQU_40ft_36in_(Product_Detail_504_02-16)-Model
Water_Quality_Unit_WQU_40ft_42in_(Product_Detail_506_01-16)-Model
Water_Quality_Unit_WQU_40ft_48in_(Product_Detail_508_02-16)-Model
Water_Quality_Unit_WQU_40ft_60in_(Product_Detail_510_02-16)-Model
Sell_Sheet_LID_Stormwater_Treatment_WQU_(10793_01-11)
Testing_Storm_Water_Quailty_Unit_(Tech_Note_A1.04)
Storm Water Quality Unit Product Specification
Storm_Water_Quality_Unit_Product_Specification

Installation Guides

Installation_SWQU_(2.01A-)
Installation_Water_Quality_Unit_WQU_Backfill_and_Final_Cover_(Detail_511B_02-16)-Model
Installation_Water_Quality_Unit_WQU_Connecting_Bypass_(Detail_511A_02-16)-Model
Installation_Water_Quality_Unit_WQU_Trench_and_Placement_(Detail_511_02-16)-Model
Drainage_Handbook_ADH5_Installation_(11-16)

Specifications

Drainage_Handbook_ADH8_References_Standards_(06-14)
A1.04-Testing_SWQU
1-54 ADS Storm Water Quality Unit Product Specification
1.08 Oil Spill Storage Capacities for BaySeparator Barracuda WQU June18 Specification

Details - Product

Water_Quality_Unit_WQU_20ft_42in_(Product_Detail_505_02-16)-Model

Inspect. & Maintenance. - Technical Literature

Maintenance_SWQU_(_2.02A_(10-09)

Structural Design - Technical Literature

Drainage_Handbook_ADH2_Structures_(05-15)

Hydraulics - Technical Literature

Drainage_Handbook_ADH3_Hydraulics_(07-14)

Durability - Technical Literature

Chemical_Resistance_PE-Elastomers_(Tech_Note_A4.01)
Drainage_Handbook_ADH4_Durability_(11-15)

Fittings

ADS_Fittings_Manual_-_09-16-16

Case Studies/Approvals

BMP_Water_Quality_Structures_(Prod_Note_3.142)
EPA_Storm_Water_Quailty_Unit_Phase2_BMPA(1.03)
St_Louis_MSD_Approval_Mailer_dual_branded_02-08
OHDOTWQU_Approval_Mailer

Brochure

Brochure_Water_Quality_Units_(ADS_0505_07-10)
Water Management Product Catalog 2018
11047 Ag Products Brochure, 07-17