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New Mailing Address for Payments: PO Box 35113, Seattle, WA 98124-5113

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Standards & Specs

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Water Details (PDFs)
Combined PDF File
ALL Water Details Combined
WD-16
Tapping Tee & Valve
WD-1
Minimum Standard Depth Requirements
WD-17
Hydrant Guard Posts
WD 2
Meter Boxes and Lids
WD-18
Valve Marker Post
WD-4
1-inch Service Installation
WD-19
1-inch Combination Air & Vacuum Release Valve
WD-4A
Meter Setter 1″ Water Service
WD-19A
2-inch Combination Air & Vacuum Release Valve
WD-4B
Block Out for Meter Boxes in Concrete Driveways
WD-19B
1″ Combination Air and Vacuum Release Valve
WD-4C
Pressure Reducing Valve 3/4″ to 2″
WD-19C
2″ Combination Air and Vacuum Release Valve
WD-5
1-1/2-inch & 2-inch Service Installation
WD-20
Private Fire System Double Check Detector Assembly (DCDA) Profile View
WD-6
2-inch Blowoff Assembly
WD-20A
Private Fire System Double Check Detector Assembly (DCDA) Plan View
WD-7
Fire Hydrant Assembly
WD-22
3-inch & 4-inch Meter Service Installation
WD-8
Hydrant Use Requirements
WD-23
4″ By-Pass Valve
WD-9
Relocate / Replace Existing Fire Hydrant Assembly
WD-24
Double Check Valve Assembly 3/4″ -2″ Assemblies
WD-11
Thrust Block Details
WD-25
Reduced Pressure Backflow Assembly (RPBA) 3/4-inch to 2-inch
WD-12
Thrust Blocking for Vertical Bends
WD-26
Reduced Pressure Backflow Assembly (RPBA) 3-inch or Larger
WD-13
Cast Iron Valve Box
WD-27
Above Ground Detector Check Valve Assembly (DCVA) 3-inch or Larger
WD-14
Valve Stem Extension
WD-28
Reduced Pressure Detector Assembly (RPDA) 3-inch or Larger
WD-15
Valve Box Adjustment
Sewer Details (PDFs)
Combined PDF File
ALL Sewer Details Combined
S-9
Lamphole/Cleanout
S-3
Standard Precast Manhole
S-10
Sewer Lateral New Construction
S-3A
Saddle Manhole
S10-A
Alternate Sewer Lateral New Construction
S-4
Polyproplene Ladder & Manhole Steps
S-10B – Available upon request –
Standing Sewer Lateral New Construction
S-5
Manhole Frame & Cover
S-11
Sewer Lateral Existing Mains
S-6
Shallow Manhole Under 5′ Invert to Cover
S-12
1″ wastewater combination air and vacuum release valve
S-8
Drop Manhole Connection
S-13
Sewer Valve Marker Post
S-8A
Force Main Drop Manhole Connection
Lift Station Details (PDFs)
Combined PDF File
ALL Lift Station Details Combined
LS-5
Type 2 Lift Station (profile)
LS-1
Type 1 Lift Station (Plan)
LS-7
Type 3 Lift Station
LS-2
Type 1 Lift Station (Profile)
LS-8
Typical Lift Station One-Line
LS-3
Type 1 & 2 Lift Station Bypass (profile)
LS-9
Preparing Instrumentation (Signal) Cables
LS-4
Type 2 Lift Station (plan)
Side Sewer Details (PDFs)
Combined PDF File
ALL Side Sewer Details Combined
SS-5
Oil/Water Separator
SS-1
Standard Side Sewer
SS-5A
Oil/Water Separator (Cover Option Details)
SS-2
Private Side Sewer Installation
SS-7
Single Residential Connection Grinder Pump and Pressure Connection to Gravity System
SS-3
Alternate Side Sewer Installation
SS-8A
Private Backwater Valve Assembly Sanitary Sewer
SS-4
Grease Interceptors
SS-8B
Private Backwater Valve Assembly Outside Installation
Trenchless Installation (PDFs)
TI-1
Typical Casing Detail
Aggregates, Trenching, Backfill and Restoration Details (PDFs)
Combined PDF File
All TBR Details Combined
TBR-5
Concrete Anchor for Pipe in Steep Slopes
TBR-1
Trench Section Pipe Bedding & Trench Backfill
TBR-6
Casting Adjustments
TBR-2
Trench Surface Restoration
TBR-7
Zone of Influence
TBR-3
Unsuitable Foundation Excavation
TBR-8
Galvanic Anode Installation
TBR-4
Trench Dams