SECTION 15141

POTABLE WATER PIPING

PART 1 GENERAL

1.1	SUMMARY

A.	Includes But Not Limited To

1.	Perform excavating and backfilling required by work of this Section.

2.	Furnish and install potable water piping complete with necessary valves, connections, and accessories inside building and connect with outside utility lines 5 feet from building perimeter as described in Contract Documents.

B.	Related Sections

1.	Division 02 -

a.	Criteria for performance of excavation and backfill

b.	Potable water piping from 5 feet from building perimeter to main

2.	Section 15055 - General Mechanical Requirements

3.	Section 15083 - Potable Water Piping Insulation

1.2	REFERENCES

A.	American Society For Testing And Materials

1.	ASTM B 88-96, 'Standard Specification for Seamless Copper Water Tube'

1.3	SUBMITTALS

A.	Quality Assurance / Control - Written report of sterilization test

1.4	QUALITY ASSURANCE

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

PART 2 PRODUCTS

2.1	COMPONENTS

A.	Pipe

1.	Meet requirements of ASTM B 88.

a.	Type K for underground or beneath concrete slab. 3/4 inch minimum under slabs.

b.	Type L for above ground applications.

B.	Fittings - Wrought copper.

C.	Connections

1.	Above-Grade - Sweat copper type with 95/5 or 96/4 Tin-Antimony solder, Bridgit solder, or Silvabrite 100 solder. Use only lead-free solder.

2.	Below Grade -

a.	Brazed using following type rods -

1)	Copper to Copper Connections -

a)	AWS Classification BCuP-4 Copper Phosphorus (6 percent silver).

b)	AWS Classification BCuP-5 Copper Phosphorus (15 percent silver).

2)	Copper to Brass or Copper to Steel Connections - AWS Classification BAg-5 Silver (45 percent silver).

3)	Do not use rods containing Cadmium.

b.	Brazing Flux -

1)	Approved Manufacturers -

a)	Stay-Silv white brazing flux by J W Harris Co

b)	High quality silver solder flux by Handy & Harmon

c.	Joints under slabs acceptable only if allowed by local codes.

D.	Ball Valves

1.	Use ball valves exclusively unless otherwise specified. Ball valves shall be by single manufacturer from approved list below. Valves shall be two piece, full port for 150 PSI SWP.

2.	Quality Standard - Nibco-Scott T585 or S585

3.	Approved Manufacturers -

a.	ConBraCo 'Apollo'

b.	Hammond

c.	Honeywell-Braukmann

d.	Jenkins

e.	Milwaukee

f.	Nibco-Scott

g.	Stockham

h.	Watts

E.	Combination Pressure Reducing Valve / Strainer

1.	Integral stainless steel strainer, or separate 'Y' strainer installed upstream of pressure reducing valve.

2.	Built-in thermal expansion bypass check valve.

3.	Quality Standard - Watts U5B

4.	Approved Manufacturers -

a.	Cash Valve

b.	Clay Valve - Hi Capacity

c.	Con Braco 36C

d.	Honeywell-Braukmann

e.	Spence - Hi Capacity

f.	Watts

g.	Wilkins

PART 3 EXECUTION

3.1	INSTALLATION

A.	Below Grade

1.	Install piping under slabs without joints where possible.

2.	Insulate water piping buried within building perimeter.

3.	Bury water piping 6 inches minimum below bottom of slab and encase in 2 inches minimum of sand.

B.	Locate cold water lines a minimum of 6 inches from hot water line.

3.2	FIELD QUALITY CONTROL

A.	Site Tests - Before pipes are covered, test systems in presence of Architect at 100 psi hydrostatic pressure for two hours and show no leaks.

3.3	CLEANING

A.	Sterilize potable water system with solution containing 200 parts per million minimum of available chlorine and maintaining pH of 7.5 minimum. Introduce chlorinating materials into system in manner approved by Architect. Allow sterilization solution to remain for 24 hours and open and close valves and faucets several times during that time.

B.	After sterilization, flush solution from system with clean water until residual chlorine content is less than 0.2 parts per million.

C.	Water system will not be accepted until negative bacteriological test is made on water taken from system. Repeat dosing as necessary until such negative test is accomplished.

END OF SECTION