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NFPA 13 2007 EditionNFPA 13 2007 Edition
An Overview of Changes from theAn Overview of Changes from the2002 Edition of NFPA132002 Edition of NFPA13
PresenterPresenterTom WellenTom Wellen American Fire Sprinkler AssociationAmerican Fire Sprinkler Association 9696 Skillman St., Ste. 300 9696 Skillman St., Ste. 300 •• Dallas, TX 75243 Dallas, TX 75243 Phone: (214) 349-5965Phone: (214) 349-5965 Email: twellen@firesprinkler.orgEmail: twellen@firesprinkler.org
Report on Proposals (ROP)Report on Proposals (ROP)Report on Comments (ROC)Report on Comments (ROC)
1200 + Proposals and Comments1200 + Proposals and CommentsReviewed and Acted on for the 2007Reviewed and Acted on for the 2007EditionEdition
Chronology of Sprinkler StandardsChronology of Sprinkler Standards2006 Revision Cycle2006 Revision Cycle
Report on Proposals (ROP) 06-24-05Report on Proposals (ROP) 06-24-05 Report on Comments (ROC) 02-24-06Report on Comments (ROC) 02-24-06 Accepted Intent to Make a MotionAccepted Intent to Make a Motion
(NITMAM) 05-02-06(NITMAM) 05-02-06 Presentation at Technical CommitteePresentation at Technical Committee
Reports Session Reports Session –– NFPA Conference NFPA ConferenceJune 4-8, 2006June 4-8, 2006
Standards Council Meeting July 2006Standards Council Meeting July 2006
Chapter 3 : DefinitionsChapter 3 : Definitions New Definition for:New Definition for:
Institutional SprinklerInstitutional Sprinkler Pilot Line DetectorPilot Line Detector Clearance Requirements For StorageClearance Requirements For Storage Aisle width measured between Loads, not RacksAisle width measured between Loads, not Racks Revised Definition of Revised Definition of ““Shelf StorageShelf Storage”” Compact Storage ModuleCompact Storage Module Compact Shelf StorageCompact Shelf Storage Arm-OverArm-Over SprigSprig Multi-Cycle SystemMulti-Cycle System
Table of ContentsTable of Contents
20022002 1 Administration1 Administration 2 Ref. Publications2 Ref. Publications 3 Definitions3 Definitions 4 Gen. Requirements4 Gen. Requirements 5 Classification of Occ. and5 Classification of Occ. and
CommoditiesCommodities 6 System Components and6 System Components and
HardwareHardware 7 System Requirements7 System Requirements 8 Installation Requirements8 Installation Requirements 9 Hanging, Bracing, and Restraint9 Hanging, Bracing, and Restraint
of System Pipingof System Piping 10 Underground Piping10 Underground Piping 11 Design Approaches11 Design Approaches
20072007 1 Administration1 Administration 2 Ref. Publications2 Ref. Publications 3 Definitions3 Definitions 4 Gen. Requirements4 Gen. Requirements 5 Classification of Occ. and5 Classification of Occ. and
CommoditiesCommodities 6 System Components and6 System Components and
HardwareHardware 7 System Requirements7 System Requirements 8 Installation Requirements8 Installation Requirements 9 Hanging, Bracing, and Restraint9 Hanging, Bracing, and Restraint
of System Pipingof System Piping 10 Underground Piping10 Underground Piping 11 Design Approaches11 Design Approaches
Table of ContentsTable of Contents 20022002
12 Storage12 Storage 20072007
12 General Requirements for Storage12 General Requirements for Storage 13 Miscellaneous Storage13 Miscellaneous Storage 14 Protection of Class I to IV14 Protection of Class I to IV
CommoditiesCommodities 15 15 Protection of Plastic and Rubber
Commodities That Are StoredPalletized, Solid Piled, Bin Boxes, orShelf Storage
16 Protection of Class I ThroughClass IV Commodities That AreStored on Racks
17 Protection of Plastic and RubberCommodities That Are Stored onRacks
18 Protection of Rubber Tire Storage 19 Protection of Roll Paper 20 Special Designs of Storage
Protection
Table of ContentsTable of Contents
20022002 13 Special Occupancy13 Special Occupancy
RequirementsRequirements 14 Plans and Calcs.14 Plans and Calcs. 15 Water Supplies15 Water Supplies 16 Systems Acceptance16 Systems Acceptance 17 Marine Systems17 Marine Systems 18 System Inspection,18 System Inspection,
Testing, and Maint.Testing, and Maint.
20072007 21 Special Occupancy21 Special Occupancy
RequirementsRequirements 22 Plans and Calcs.22 Plans and Calcs. 23 Water Supplies23 Water Supplies 24 Systems Acceptance24 Systems Acceptance 25 Marine Systems25 Marine Systems 26 System Inspection,26 System Inspection,
Testing, and Maint.Testing, and Maint.
Chapter 3: DefinitionsChapter 3: Definitions
New Definition for:New Definition for: ““WoodWood”” and and ““PlasticPlastic”” Pallets Pallets Revised Definitions of Revised Definitions of ““CompartmentCompartment”” and and ““SmallSmall
RoomRoom”” : maximum wall opening is 8 ft. with an 8 in. : maximum wall opening is 8 ft. with an 8 in.Lintel and 3 ft. with no LintelLintel and 3 ft. with no Lintel
Types of Rack Storage: Solid Types of Rack Storage: Solid –– Slatted Slatted –– Open Open Revised Revised ““open rackopen rack”” to clarify 50% calculation rule to clarify 50% calculation rule ““Rack Shelf AreaRack Shelf Area”” minimum 3 in. flue space on all minimum 3 in. flue space on all
4 sides4 sides
Chapter 4: General RequirementsChapter 4: General Requirements
OwnerOwner’’s Certificate Modifieds Certificate Modified Water supply conditions that impact allWater supply conditions that impact all
Corrosion, not just MICCorrosion, not just MIC Section 4.4 Introduction of ChemicalsSection 4.4 Introduction of Chemicals
Stop leaks or similarly acting chemicalsStop leaks or similarly acting chemicalsprohibitedprohibited
Appendix material on biocides and otherAppendix material on biocides and otherchemicals for MIC prevention acceptablechemicals for MIC prevention acceptable
Chapter 5: Occupancy/CommodityChapter 5: Occupancy/CommodityClassificationClassification
Ordinary Hazard OccupanciesOrdinary Hazard Occupancies 5.3 Refers to Storage Chapters for Dedicated5.3 Refers to Storage Chapters for Dedicated
and Miscellaneous Storageand Miscellaneous Storage Annex clarifies Annex clarifies ““ModerateModerate”” and and ““HighHigh”” heat heat
release ratesrelease rates 5.6.2 Plastic Pallets - Plastic pallets are5.6.2 Plastic Pallets - Plastic pallets are
considered reinforce unless otherwiseconsidered reinforce unless otherwisepermanently marked or certifiedpermanently marked or certified
Chapter 6: Components andChapter 6: Components andHardwareHardware
6.2.9 Spare Head Cabinet6.2.9 Spare Head Cabinet List required in cabinet:List required in cabinet:
SINSIN DescriptionDescription Temperature ratingTemperature rating Quantity of spare sprinklersQuantity of spare sprinklers Issue or revision date of the
list 6.3.8 Marking of Pipe6.3.8 Marking of Pipe
Must be Must be ““VisibleVisible”” on all lengths on all lengthsover 2 ft.over 2 ft.
6.5.2 Welding Changes6.5.2 Welding Changes 6.5.5.2 Outlet Fittings
Rubber-gasketed outlet fittingrequirements
Chapter 6: Components andChapter 6: Components andHardwareHardware
6.7.4 Identification of Valves6.7.4 Identification of Valves Sign required referring to existence and location of
other valves for multiple water feeds. 6.8 Fire Department Connections
Single connection permitted for riser sizes 3 in. andsmaller
6.9 Waterflow Detecting Devices Deluge and preaction systems activated by pilot
sprinklers does not require an independentdetection system alarm.
Chapter 7: System RequirementsChapter 7: System Requirements
7.1.3 New Air Venting Requirements7.1.3 New Air Venting Requirements Means to exhaust air while filling systemMeans to exhaust air while filling system Intended to reduce oxygen for corrosionIntended to reduce oxygen for corrosion
Chapter 7: System RequirementsChapter 7: System Requirements
Dry System Water Delivery TimeDry System Water Delivery Time New Table 7.2.3.6 for calculations:New Table 7.2.3.6 for calculations:
Residential 15 Sec Residential 15 Sec Light 60 SecLight 60 Sec Ordinary I&II 50 SecOrdinary I&II 50 Sec Extra I&II 45 SecExtra I&II 45 Sec High Piled Storage 40 SecHigh Piled Storage 40 Sec
TIA 849TIA 849 Water Delivery TimeWater Delivery Time
Listed Water Delivery Calculation ProgramListed Water Delivery Calculation Program Water Delivery to Test Valve or Manifold OutletWater Delivery to Test Valve or Manifold Outlet
Chapter 7: System RequirementsChapter 7: System Requirements
7.2.5.4 High water level protection7.2.5.4 High water level protection Externally resetting Dry Pipe ValvesExternally resetting Dry Pipe Valves Low Differential Dry Pipe ValvesLow Differential Dry Pipe Valves Use either high water level device or automatic drainUse either high water level device or automatic drain
7.2.6 Dry System Air Supply7.2.6 Dry System Air Supply Relieve Valve set at 10 psi above required system air pressureRelieve Valve set at 10 psi above required system air pressure
regardless of air sourceregardless of air source Compressors supplying less than 5.5 ft ^3/min at 10 psi Do NotCompressors supplying less than 5.5 ft ^3/min at 10 psi Do Not
Require a AMD or ReceiverRequire a AMD or Receiver
7.3.2.3 Double Interlock Pre-action System7.3.2.3 Double Interlock Pre-action System Water Delivery Time 60 secWater Delivery Time 60 sec Water Delivery Based on Time and Hazard Water Delivery Based on Time and Hazard –– similar to Dry Pipe similar to Dry Pipe
SystemsSystems Single and Double Interlock pre-action Systems can not be gridded forSingle and Double Interlock pre-action Systems can not be gridded for
systems protecting storagesystems protecting storage
Chapter 7: System RequirementsChapter 7: System Requirements
7.5 Multi-Cycle Systems7.5 Multi-Cycle Systems
7.6 Antifreeze Systems7.6 Antifreeze Systems Riser Placard Required for Remote Antifreeze SystemsRiser Placard Required for Remote Antifreeze Systems Placard on AF Control Valve listing AF Type, Brand,Placard on AF Control Valve listing AF Type, Brand,
Concentration and System VolumeConcentration and System Volume Test/Drain Connection Required for Systems over 40 GallonsTest/Drain Connection Required for Systems over 40 Gallons Use Minimum Concentration Required for TemperatureUse Minimum Concentration Required for Temperature Antifreeze and ESFR Sprinklers must be listed for useAntifreeze and ESFR Sprinklers must be listed for use
togethertogether Backflow with Pump/Automatic Release System, no expansionBackflow with Pump/Automatic Release System, no expansion
chamberchamber
Chapter 7: System RequirementsChapter 7: System Requirements
7.8 Outside Sprinklers/Exposure Protection7.8 Outside Sprinklers/Exposure Protection Revised Sprinkler Positioning CriteriaRevised Sprinkler Positioning Criteria Better Correlated with NFPA 15 Water Spray Systems and toBetter Correlated with NFPA 15 Water Spray Systems and to
include NFPA 15 Terms for Exposureinclude NFPA 15 Terms for Exposure ProtectionProtection
7.9 Refrigerated Spaces for Pre-action Systems7.9 Refrigerated Spaces for Pre-action Systems Detectors should operate before sprinklersDetectors should operate before sprinklers Electric/Pneumatic Fixed Temp Electric/Pneumatic Fixed Temp –– No Rate of Rise No Rate of Rise
Chapter 8 :Installation RequirementsChapter 8 :Installation Requirements
8.1 Furniture ( Wardrobes, Cabinets, Trophy Cases )8.1 Furniture ( Wardrobes, Cabinets, Trophy Cases )Do Not Require Sprinklers inside even if attached toDo Not Require Sprinklers inside even if attached tothe buildingthe building
8.2.5 Detached Buildings8.2.5 Detached Buildings
Multiple Attached Buildings May be Protected by a SingleMultiple Attached Buildings May be Protected by a SingleSystemSystem
Detached Buildings Require Separate Sprinkler SystemsDetached Buildings Require Separate Sprinkler Systems
Chapter 8 : Installation RequirementsChapter 8 : Installation Requirements
8.3.1.5 Protective Caps and Straps8.3.1.5 Protective Caps and Straps Caps may be removed on installation when sprinklers areCaps may be removed on installation when sprinklers are
more than 10ft above floormore than 10ft above floor Remove per ManufacturerRemove per Manufacturer’’s instructionss instructions Recommended removal after other construction activities areRecommended removal after other construction activities are
completedcompleted Must remove Before Sprinkler System is placed into serviceMust remove Before Sprinkler System is placed into service
8.3.2.5 Temperature Ratings8.3.2.5 Temperature Ratings Intermediate-temperature classification or higher for sprinklers
in walk-in type coolers and freezers
Chapter 8 :InstallationChapter 8 :InstallationRequirementsRequirements
8.4.10 Dry Sprinklers8.4.10 Dry Sprinklers Consider length of pipe toConsider length of pipe to
avoid freezing due toavoid freezing due toconductionconduction
Sealing requirements forSealing requirements forspace around sprinklerspace around sprinklerbarrel to avoid air leakagebarrel to avoid air leakage
4.2 K-factors permitted on4.2 K-factors permitted ondry pipe systems wheredry pipe systems wherepipe is corrosion resistantpipe is corrosion resistantor galvanizedor galvanized
8.5.4.1.2 Distance Below Ceilings8.5.4.1.2 Distance Below Ceilings For corrugated metal deck roofs up to 3For corrugated metal deck roofs up to 3”” in depth, in depth,
deflector distance is measured to the bottom ofdeflector distance is measured to the bottom ofdeckdeck
Deflector distance on deeper decks >3Deflector distance on deeper decks >3”” is ismeasured to the highest point on the deckmeasured to the highest point on the deck
8.5.4.1 Distance Below Ceilings.
3" 3+"
ab
Chapter 8 : Installation RequirementsChapter 8 : Installation Requirements
Chapter 8 :Installation RequirementsChapter 8 :Installation Requirements 8.6.4.1.3 Peaked Roofs and Ceilings
Table 8.6.5.1.2 Positioning of Sprinklers to AvoidObstructions to Discharge (SSU/SSP)
Expanded to include: 5 ft to less than 5 ft 6 in. 18 5 ft 6 in. to less than 6 ft 20 6 ft to less than 6 ft 6 in. 24 6 ft 6 in. to less than 7 ft 30 7 ft to less than 7 ft 6 in. 35
Chapter 8 :Installation RequirementsChapter 8 :Installation Requirements Table 8.8.5.1.2 Position of Sprinklers to Avoid
Obstructions to Discharge (Extended Coverage Uprightand Pendent Spray Sprinklers)
Expanded to include: 7 ft to less than 7 ft 6 in. 14 7 ft 6 in. to less than 8 ft 14 8 ft to less than 8 ft 6 in. 15 8 ft 6 in. to less than 9 ft 17 9 ft to less than 9 ft 6 in. 19 9 ft 6 in. to less than 10 ft 21
Chapter 8 :Installation RequirementsChapter 8 :Installation Requirements8.10 Residential Sprinklers8.10 Residential Sprinklers
8.10.2.2 Listed heads on ceiling slopes greater than 2 in 128.10.2.2 Listed heads on ceiling slopes greater than 2 in 12 8.10.3.4 The maximum distance shall be measured along the
slope of the ceiling 8.10.3.4 and 5, New Figures added for distances between
sprinklers 8.10.7.2.1.7 No regard for ceiling fans where plan view of fan8.10.7.2.1.7 No regard for ceiling fans where plan view of fan
is at least 50% open, motor housing is the 4 times ruleis at least 50% open, motor housing is the 4 times rule New requirement for placement of sprinklers in regards toNew requirement for placement of sprinklers in regards to
soffits and cabinetssoffits and cabinets
Chapter 8 :Installation RequirementsChapter 8 :Installation Requirements
8.12 ESFR8.12 ESFR Distance below ceilingsDistance below ceilings
Added pendent sprinklers K-16.8 and K-22.4Added pendent sprinklers K-16.8 and K-22.4 K-16.8 K-16.8 –– min. 6 in. and max. 14 in. min. 6 in. and max. 14 in. K-22.4 K-22.4 –– min. 6 in. and max. 18 in. min. 6 in. and max. 18 in.
8.14 Pilot Line Detectors8.14 Pilot Line Detectors Protection from damageProtection from damage SpacingSpacing Piping support requirementsPiping support requirements
Chapter 8 :Installation RequirementsChapter 8 :Installation Requirements
8.15.4 Vertical Openings8.15.4 Vertical Openings Draft Stops eliminated when QR SprinklersDraft Stops eliminated when QR Sprinklers
installed in LH an OH Occupancies?installed in LH an OH Occupancies? Closely spaced sprinklers/draft stops required whenClosely spaced sprinklers/draft stops required when
serving as an alternate to Enclosure of verticalserving as an alternate to Enclosure of verticalopeningopening
Exception for large floor openings retainedException for large floor openings retained Section on convenience openings in dwelling unitsSection on convenience openings in dwelling units
removedremoved Annex revised to clarify when requiredAnnex revised to clarify when required
Chapter 8 :Installation RequirementsChapter 8 :Installation Requirements
8.15.7 Exterior Roofs or Canopies8.15.7 Exterior Roofs or Canopies Sprinklers not required under non-combustible,Sprinklers not required under non-combustible,
limited combustible or fire retardant treatedlimited combustible or fire retardant treatedwoodwood
No storage under: temporarily parked vehiclesNo storage under: temporarily parked vehiclesare not storage: i.e. drive-up windows, porte-are not storage: i.e. drive-up windows, porte-cocherescocheres
Small 55 ftSmall 55 ft__ concealed spaces over small roofs concealed spaces over small roofsor canopiesor canopies
Chapter 8 :Installation RequirementsChapter 8 :Installation Requirements 8.15.9 Library Stack Areas and Medical Record
Storage Now includes Medical Record Storage
8.15.11 Industrial Ovens and Furnaces Additional details for sprinkler placement
8.16.2.3.2 Preaction Systems. In preaction systems, branch lines shall be pitched at least
1⁄2 in. per 10 ft (4 mm/m) and mains shall be pitched atleast 1⁄4 in. per 10 ft (2 mm/m)
Removed “where a portion of the piping is subject tofreezing”
Chapter 8 :Installation RequirementsChapter 8 :Installation Requirements 8.16.2.5.3.6 Systems with low point drains shall have a sign at
the dry pipe or preaction valve indicating the number of lowpoint drains and the location of each individual drain
8.16.3 Provision for Flushing Systems. 8.16.3.1 All sprinkler systems shall be arranged for flushing. 8.16.3.2 Readily removable fittings shall be provided at the end of all cross mains. 8.16.3.3 All cross mains shall terminate in 11⁄4 in. (32 mm) or
larger pipe. 8.16.3.4 All branch lines on gridded systems shall be arranged to
facilitate flushing.
Chapter 8 :Installation RequirementsChapter 8 :Installation Requirements 8.16.4.1 Protection of Piping Against Freezing.
Listed heat tracing permitted.
8.16.4.2 Protection of Piping Against Corrosion. 8.16.4.2.2 Where water supplies or environmental
conditions are known to have unusual corrosive properties,piping shall have a corrosion resistance ratio (CRR) of 1 ormore and the system shall be treated in accordance with23.1.5.
Chapter 9 :Chapter 9 :Hanging-Bracing-RestraintHanging-Bracing-Restraint
9.1.1.6 Trapeze Hangers 9.1.1.6 Trapeze Hangers Be sized to support the suspended sprinkler pipe. The ring, strap, or clevis installed on a pipe trapeze
shall be manufactured to fit the pipe size of thetrapeze member – means to use a heavy duty ortrapeze ring, strap, or clevis.
Chapter 9 :Chapter 9 :Hanging-Bracing-RestraintHanging-Bracing-Restraint
9.1.2.3 Hanger Rods No lateral gravity loads induced on the rods.
Chapter 9 :Chapter 9 :Hanging-Bracing-RestraintHanging-Bracing-Restraint
9.2.1.3.3* Flexible Sprinkler Hose Fittings. New requirement where flexible sprinkler hose fittings exceed 6 ft. in
length and are supported by a suspended ceiling, a hanger(s) attached tothe structure shall be required to ensure that the maximum unsupportedlength does not exceed 6 ft.
9.2.3.7 Sprigs 4 ft. or longer restrained against lateral movement.
9.2.6 Pipe Stands Pipe stands to support a minimum of 5 times the weight of the
water-filled pipe, plus 250 lb. Must be approved
Chapter 9 :Chapter 9 :Hanging-Bracing-RestraintHanging-Bracing-Restraint
9.3 Protection of Piping Against DamageWhere Subject to Earthquakes Major modifications to the requirements ASCE 7 Will align with IBC requirements
Chapter 10 :Underground PipingChapter 10 :Underground Piping
10.8.3 Added Annex material regarding 10.8.3 Added Annex material regardingrestrained joint systemsrestrained joint systems
Added Industry References/Standards forAdded Industry References/Standards fordesigning and calculating retrained jointdesigning and calculating retrained jointsystemssystems
Chapter 11 :Design ApproachesChapter 11 :Design Approaches 11.1.3 Clarified General Criteria Section applies to all11.1.3 Clarified General Criteria Section applies to all
hydraulic calculated systems, including Storagehydraulic calculated systems, including Storage
Chapter 21 New Section dedicated to Chapter 21 New Section dedicated to ““SpecialSpecialOccupancy ApproachesOccupancy Approaches””
Operating pressure dependent on sprinkler spacingOperating pressure dependent on sprinkler spacingparallel to slopeparallel to slope
11.2.3.2.3 Area reduction for ordinary hazard protected11.2.3.2.3 Area reduction for ordinary hazard protectedwith QR heads survived another attempt to removewith QR heads survived another attempt to remove
Chapter 11 :Design ApproachesChapter 11 :Design Approaches 11.2.3.3 Room Design Method for corridors, EC heads11.2.3.3 Room Design Method for corridors, EC heads
within 75 ft.within 75 ft.
11.3 Special Design Approaches11.3 Special Design Approaches Residential SprinklersResidential Sprinklers Exposure ProtectionExposure Protection Water CurtainsWater Curtains
11.3.3.5 New criteria for protection of11.3.3.5 New criteria for protection ofconcealed/combustible roof spacesconcealed/combustible roof spaces Wood members spaced no more than 3 ft o/cWood members spaced no more than 3 ft o/c Slopes Slopes ≥≥ 4 in 12 4 in 12
Chapter 12 :StorageChapter 12 :Storage 12 General Requirements for Storage12 General Requirements for Storage 13 Miscellaneous Storage13 Miscellaneous Storage 14 Protection of Class I to IV14 Protection of Class I to IV
CommoditiesCommodities 15 15 Protection of Plastic and Rubber
Commodities That Are StoredPalletized, Solid Piled, Bin Boxes, orShelf Storage
16 Protection of Class I ThroughClass IV Commodities That AreStored on Racks
17 Protection of Plastic and RubberCommodities That Are Stored onRacks
18 Protection of Rubber Tire Storage 19 Protection of Roll Paper 20 Special Designs of Storage
Protection
Chapter 12 :StorageChapter 12 :Storage 12 General Requirements for Storage12 General Requirements for Storage
12.10 Room Design Method now indicated12.10 Room Design Method now indicated
13 Discharge Criteria for Misc. Storage 12 ft. or13 Discharge Criteria for Misc. Storage 12 ft. orless in Heightless in Height Figures and Tables indicates OH1, OH2, EH1, EH2Figures and Tables indicates OH1, OH2, EH1, EH2 13.2.2 13.2.2 Design criteria and modifiers as permitted byDesign criteria and modifiers as permitted by
the density/area method of Chapter 11 for OH1, OH2,the density/area method of Chapter 11 for OH1, OH2,EH1, and EH2 occupancies is applicable EH1, and EH2 occupancies is applicable ……..
Other Storage Chapter ComparisonsOther Storage Chapter Comparisonsincomplete 14 - 21incomplete 14 - 21
Chapter 12 :StorageChapter 12 :Storage
22 Plans and Calculations22 Plans and Calculations 22.3.5 Computer Generated Hydraulic Reports22.3.5 Computer Generated Hydraulic Reports
standardizedstandardized 22.7 Exposure Protection Sprinkler Systems22.7 Exposure Protection Sprinkler Systems 22.8 In-Rack Sprinklers 22.8 In-Rack Sprinklers –– Balancing and hose allow. Balancing and hose allow.
23 Water Supplies23 Water Supplies Evaluate for unusual corrosive propertiesEvaluate for unusual corrosive properties Owner to notify installer and a plan developedOwner to notify installer and a plan developed Biocides and inhibitors must be compatible withBiocides and inhibitors must be compatible with
system componentssystem components