SECTION 15150

SANITARY WASTE, VENT, AND STORM PIPING

PART 1 GENERAL

1.1	SUMMARY

A.	Includes But Not Limited To

1.	Furnish and install soil, waste, and vent piping systems within building and connect with outside utility lines 5 feet out from building where applicable.

2.	Perform excavation and backfill required by work of this Section.

B.	Related Sections

1.	Division 02 -

a.	Criteria for performance of excavation and backfill

b.	Sewage piping from 5 feet out from building to main

2.	Division 07 -

a.	Furnishing and installing of roof jacks and pipe flashing at roof

b.	Quality of firestopping material

3.	Section 15051 - General Mechanical Requirements

1.2	REFERENCES

A.	American Society For Testing And Materials

1.	ASTM D 2235-96a, 'Standard Specification for Solvent Cement for ABS Plastic Pipe and Fittings'

2.	ASTM D 2321-89, 'Standard Practice for Underground Installation of Thermoplastic Pipe for Sewers and Other Gravity-Flow Applications'

3.	ASTM D 2564-96a, 'Standard Specification for Solvent Cements for Poly (Vinyl Chloride)(PVC) Plastic Piping Systems'

4.	ASTM D 3034-96, 'Standard Specification for Type PSM Poly Vinyl Chloride)(PVC) Sewer Pipe and Fittings'

5.	ASTM F 628-97, 'Standard Specification for Acrylonitrile-Butadiene-Styrene (ABS) Schedule 40 Plastic Drain, Waste, and Vent Pipe and Fittings with a Cellular Core'

6.	ASTM F 656-96a, 'Standard Specification for Primers for Use in Solvent Cement Joints of Poly (Vinyl Chloride)(PVC) Plastic Pipe and Fittings'

7.	ASTM F 789-95a, 'Standard Specification for Type PSM Poly (Vinyl Chloride)(PVC) Plastic Gravity Flow Sewer Pipe and Fittings'

8.	ASTM F 891-96, 'Standard Specification for Coextruded Poly (Vinyl Chloride)(PVC) Plastic Drain, Waste, and Vent Pipe Fittings with a Cellular Core'

1.3	QUALITY ASSURANCE

A.	Pre-Installation Meeting - Participate in meeting specified in Section 03313.

PART 2 PRODUCTS

2.1	COMPONENTS

A.	Buried Piping

1.	Minimum size of waste piping installed under floor slab on grade shall be 2 inches.

2.	Approved Type -

a.	Schedule 40 PVC Pipe: ASTM D2665F

b.	Fittings: Schedule 40 PVC

c.	Joints: ASTM D2855, solvent weld with ASTM D2564 solvent cement.

B.	Above Grade Piping

1.	Approved Types -

a.	Service weight, single-hub or no-hub type cast iron soil pipe meeting requirements of ASTM A74 .

1)	Joint Material -

a)	Single-Hub - Rubber gaskets meeting requirements of ASTM C564 .

b)	No-Hub Pipe - Neoprene gaskets with stainless steel cinch bands.

2)	Vent lines 2½ inches or smaller may be Schedule 40 galvanized steel.

C.	Fittings

1.	Cast Iron Pipe - Hub and spigot, except fittings for no-hub pipe shall be no-hub, and meet requirements of ASTM A74 .

a.	Joint Material - Rubber gaskets meeting requirements of ASTM C564 .

2.	Galvanized Pipe - Screwed Durham tarred drainage type.

PART 3 EXECUTION

3.1	INSTALLATION

A.	Excavate and backfill as specified in Section 02315 with following additional requirements

1.	Runs shall be as close as possible to those shown on Drawings.

2.	Excavate to required depth and grade to obtain fall required. Grade soil and waste lines within building perimeter 1/8 inch fall per ft in direction of flow.

3.	Bottom of trenches shall be hard. Tamp as required.

4.	Remove debris from trench prior to laying of pipe.

5.	Do not cut trenches near footings without consulting Architect.

B.	Thermoplastic Pipe And Fittings

1.	General - Piping and joints shall be clean and installed according to Manufacturer's recommendations. Break down contaminated joints, clean seats and gaskets and reinstall.

2.	Above Grade - Locate pipe hangers every 4 feet on center maximum and at elbows.

3.	Below Grade -

a.	Install in accordance with Manufacturer's recommendations and ASTM D 2321.

b.	Stabilize unstable trench bottoms.

c.	Bed pipe true to line and grade with continuous support from firm base.

1)	Bedding depth - 4 to 6 inches.

2)	Material and compaction to meet ASTM standard noted above.

d.	Excavate bell holes into bedding material so pipe is uniformly supported along its entire length. Blocking to grade pipe is forbidden.

e.	Trench width at top of pipe -

1)	Minimum - 18 inches or diameter of pipe plus one foot, whichever is greater.

2)	Maximum - Outside diameter of pipe plus two feet.

f.	Do not use back hoe or power equipment to assemble pipe.

g.	Initial backfill shall be 12 inches above top of pipe with material specified in referenced ASTM standard.

h.	Minimum cover over top of pipe not under building slab -

1)	36 inches before wheel loading.

2)	48 inches before compaction.

C.	Install piping so cleanouts may be installed as follows

1.	Where shown on Drawings and near bottom of each stack and riser.

2.	At every 135 degrees of accumulative change in direction for horizontal lines.

3.	Every 100 feet of horizontal run.

4.	Extend piping to accessible surface. Do not install piping so cleanouts must be installed in carpeted floors. In such locations, configure piping so wall type cleanouts may be used.

D.	Each fixture and appliance discharging water into sanitary sewer or building sewer lines shall have seal trap in connection with complete venting system so gasses pass freely to atmosphere with no pressure or syphon condition on water seal.

E.	Vent entire waste system to atmosphere. Join lines together in fewest practicable number before projecting above roof. Set back vent lines so they will not pierce roof near edge or valley. Vent line terminations shall be

1.	6 inches minimum above roof and 12 inches minimum from any vertical surface.

2.	Same size as vent pipe.

3.	In areas where minimum design temperature is below 0 deg F or where frost or snow closure may be possible -

a.	Vent line terminations shall be same size as vent pipe, except no smaller than 2 inches in diameter.

b.	Vents shall terminate 10 inches minimum above roof or higher if required by local codes.

F.	Furnish and install firestopping at penetrations of fire-rated structures as required under Sections 07840 and 15055.

3.2	FIELD QUALITY CONTROL

A.	Site Tests

1.	Conduct tests for leaks and defective work. Notify Architect prior to testing.

2.	Thermoplastic Pipe System -

a.	Before backfilling and compacting of trenches, cap all open ends and pressure test to 20 psi for 4 hours with no leaks. Correct leaks and defective work.

b.	After backfilling and compacting of trenches is complete but before placing floor slab, re-test as specified above. Uncover pipe and correct leaks and defective work. Re-backfill and compact and re-test.

END OF SECTION