• PVC SDR-35 "O" ring, "Ring Tight" gasket or equivalent sewer pipe
• PVC C900 class 150 or 200 water pressure pipe
• Ductile Iron Pipe (DIP) class 50 "Tyton" joint or equivalent sewer pipe

• PVC SDR-35 "O" ring, "Ring Tight" gasket or equivalent
• Or "Caulder", "Fernco" or equivalent flexible sewer pipe couplings

• 36" or more, traffic or non traffic: SDR 35
• 35" or less traffic or non traffic: C900, DIP or other approved pipe

• Dry trench: 4" of imported backfill sand (Type 1 backfill)
• Wet trench: 4" of imported 3/4" crushed rock (Type 2 backfill)

• Same material as used for bedding
• Backfill to extend 6" above top of pipe

• Material shall contain no rocks greater than 3"
• Backfill to extend from 6" above top of pipe to the surface

• Backfill as required by County or State under right of ways or roadways

• Minimum 1/4" per foot fall for 4" pipe
  - Check with bubble level, 3/4 bubble or better
• Minimum 1/16" per foot fall for 6" pipe
  - Must have District approved plans and Engineer certified grade (by survey)

• Foundation c/o located within 5' of building foundation
• Property line c/o located within 5' of the property line on homeowners side
• Length between c/o's, measure actual line length
  - 80' or less, no midlines required
  - 81' or more, midline c/o(s) required
  - Midline c/o's to be placed as close as possible to center of the line

• Bend of 45 degrees, use two 22 degree fittings coupled no closer than 18", no c/o needed
• Bend of 45 degrees needs c/o located upstream of bend, within 5'
• Bend of more than 45 degrees to 90 degrees needs special c/o arrangement and prior authorization
• Bends of more than 90 degrees are not allowed

• Riser pipe to be SDR-35
• Riser pipe to be brought up at 90 degrees from the sewer line

• T-cone cap, District preferred
• or same as pipe material (SDR-35 gasket caps)

• N9 "Christy" box or equivalent
• N9 "Christy" steel lid marked "Sewer" or equivalent
• Set to grade non traffic areas, 1/2" below grade in traffic areas

• Water must be 1 foot above and 1 foot over from sewer line in the trench
• Water minimum burial is 30", minimum Sewer burial is now 42" regardless of pipe material
• 12" of initial backfill material is now needed between the sewer line and the water line
• Any crossing of the sewer by the water line in the trench must be done at a 90 degree angle from 1' above and over on one side of the trench to 1' above and over on the other side of the trench

Test Equipment

• Test gauge
  - To read in 1/10 pound increments (10 or 15 lb gauge recommended)
  - Gauge to be mounted on a hard line that allows it to be read outside of the trench
• Test plug and isolation plugs as needed
• Air compressor or air tank

Test Set-up

• Test plug set at foundation c/o
• Isolation plug set at property line c/o and midline c/o's if needed
  - Caps on midline c/o's are acceptable if they will hold
• Inflate plugs to isolate line
• Air up sewer line to 3.5 psi

Test Pressure

• 3.5 psi for 5 minutes for remodel or new construction.
• 0.5 psi loss in 5 minutes is allowable
• 0.6 psi loss in 5 minutes is a failure

Contractor to release air on test (do not pull a plug, could shock damage couplings in the line)

• Wait for inspector to request air release
• Release air through fill stem
• Volume of air released
  - Should take several minutes
• Gauge pressure drops with air release

Check caps

• T-cone preferred or same as pipe material
• Caps must be on to protect pipe

Check boxes, (if boxes are not set, protection needed for risers)

• Set to grade, 1/2" below grade in traffic areas
• Christy N9 or equivalent top box
• Christy N9 or equivalent steel lid marked "SEWER"
• Risers must be protected if boxes are not set

Drawing and measurements if safe

• Make every attempt to complete drawing and measurements if work site is safe. Safety.
• If site is unsafe, do at Final Inspection. Safety

Complete paper work

• Air Test inspection form, give signed inspection notice to contractor
• If test fails, issue Correction Notice, explain deficiencies to contractor