This comprehensive publication provides a convenient reference for regulations in the 2018 International Swimming Pool and Spa Code™ (ISPSC™). Presented in an easy-to-reference format the commentary includes the full text of the code, including tables and figures, followed by corresponding commentary at the end of each section in one document. Every chapter begins with “General Comments” and “Purpose” sections followed by code and commentary to subsequent sections, tables and figures.

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1	2018 ISPSC® CODE AND COMMENTARY
2	2018 ISPSC® CODE AND COMMENTARY TITLE PAGE
3	COPYRIGHT
4	PREFACE
6	TABLE OF CONTENTS
8	CHAPTER 1: SCOPE AND ADMINISTRATION GENERAL COMMENTS PURPOSE PART 1—SCOPE AND APPLICATION SECTION 101 GENERAL
9	COMMENTARY FIGURE 101.2(1) TYPICAL INGROUND POOL COMMENTARY FIGURE 101.2(2) NATURAL BODY OF WATER IS NOT POOL COMMENTARY FIGURE 101.2(3) PORTABLE POOL NOT DESIGNED TO HAVE A CIRCULATION SYSTEM COMMENTARY FIGURE 101.2(4) ONGROUND STORABLE POOLS WITH CIRCULATION SYSTEM
10	SECTION 102 APPLICABILITY
12	PART 2—ADMINISTRATION AND ENFORCEMENT SECTION 103 DEPARTMENT OF BUILDING SAFETY SECTION 104 DUTIES AND POWERS OF THE CODE OFFICIAL
16	SECTION 105 PERMITS
18	SECTION 106 INSPECTIONS
22	SECTION 107 VIOLATIONS
23	SECTION 108 MEANS OF APPEAL
25	BIBLIOGRAPHY
26	CHAPTER 2: DEFINITIONS GENERAL COMMENTS PURPOSE SECTION 201 GENERAL SECTION 202 DEFINITIONS
29	COMMENTARY FIGURE 202(1) PERMANENT RESIDENTIAL EXERCISE SPA
31	COMMENTARY FIGURE 202(2) INDOOR CLASS A COMPETITION POOL COMMENTARY FIGURE 202(3) OUTDOOR CLASS A COMPETITION POOL COMMENTARY FIGURE 202(4) CLASS B PUBLIC POOL
32	COMMENTARY FIGURE 202(5) CLASS B PUBLIC POOL COMMENTARY FIGURE 202(6) CLASS C SEMI-PUBLIC POOL COMMENTARY FIGURE 202(7) CLASS D-2 ACTIVITY POOL COMMENTARY FIGURE 202(8) CLASS D-3 CATCH POOL
33	COMMENTARY FIGURE 202(9) CLASS D-3 CATCH POOL COMMENTARY FIGURE 202(10) CLASS D-3 CATCH POOL COMMENTARY FIGURE 202(11) CLASS D-4 LEISURE RIVER COMMENTARY FIGURE 202(12) CLASS D-6 INTERACTIVE PLAY ATTRACTION
34	COMMENTARY FIGURE 202(13) CLASS D-6 INTERACTIVE PLAY ATTRACTION COMMENTARY FIGURE 202(14) WADING POOL COMMENTARY FIGURE 202(15) REPAIR ON INSIDE OF POOL
35	COMMENTARY FIGURE 202(16) RESIDENTIAL POOL COMMENTARY FIGURE 202(17) RESIDENTIAL POOL AT REAR OF HOME
37	COMMENTARY FIGURE 202(18) PERMANENT SPA COMMENTARY FIGURE 202(19) TYPICAL PORTABLE SPA
40	CHAPTER 3: GENERAL COMPLIANCE GENERAL COMMENTS PURPOSE SECTION 301 GENERAL SECTION 302 ELECTRICAL, PLUMBING, MECHANICAL AND FUEL GAS REQUIREMENTS
42	SECTION 303 ENERGY
43	COMMENTARY FIGURE 303.1.3(1) FLOATING-TYPE SOLID VAPOR-RETARDANT COVER COMMENTARY FIGURE 303.1.3(2) POWERED OR PIN-DOWN-TYPE SOLID VAPOR-RETARDANT COVER
44	COMMENTARY FIGURE 303.1.3(3) SOLID VAPOR-RETARDANT SPA COVER COMMENTARY FIGURE 303.3 CIRCULATION SYSTEM CURVES VERSUS PUMP CURVE
45	SECTION 304 FLOOD HAZARD AREAS
46	SECTION 305 BARRIER REQUIREMENTS
47	COMMENTARY FIGURE 305.1(1) ON-DECK-TYPE POWERED SAFETY COVER FOR RESIDENTIAL POOL COMMENTARY FIGURE 305.1(2) INTEGRAL-TYPE POWERED SAFETY COVER FOR PUBLIC POOL COMMENTARY FIGURE 305.1(3) KEY SWITCH FOR POWERED POOL COVER OPERATION COMMENTARY FIGURE 305.1(4) NONPOWERED MESH COVER DOES NOT ALLOW FOR ABSENCE OF BARRIER AROUND POOL
48	COMMENTARY FIGURE 305.2.1(1) HEIGHT OF BARRIER ABOVE GRADE
49	COMMENTARY FIGURE 305.2.1(2) MAXIMUM CLEARANCE FROM BOTTOM OF BARRIER TO GRADE COMMENTARY FIGURE 305.2.1(3) MAXIMUM CLEARANCE FROM BOTTOM OF BARRIER TO SOLID SURFACE
50	COMMENTARY FIGURE 305.2.1(4) HEIGHT OF BARRIER WHERE MOUNTED ON TOP OF THE POOL OR SPA COMMENTARY FIGURE 305.2.1(5) MAXIMUM CLEARANCE FROM BOTTOM OF BARRIER TO TOP OF THE POOL OR SPA WHERE BARRIER IS MOUNTED ON TOP OF THE POOL OR SPA
51	COMMENTARY FIGURE 305.2.2 FOUR-INCH SPHERE CANNOT PASS THROUGH BARRIER OPENINGS COMMETNARY FIGURE 305.2.4 MESH FENCE AS A STRUCTURE TO-POOL BARRIER
52	COMMENTARY FIGURE 305.2.5(1) MAXIMUM SPACING BETWEEN VERTICAL MEMBERS WHERE DISTANCE BETWEEN TOP OF HORIZONTAL MEMBERS IS LESS THAN 45 INCHES
53	COMMENTARY FIGURE 305.2.5(2) MAXIMUM OPENING WIDTH OF DECORATIVE CUTOUTS IN BARRIER MATERIALS COMMNETARY FIGURE 305.2.6(1) MAXIMUM SPACING BETWEEN VERTICAL MEMBERS WHERE DISTANCE BETWEEN TOPS OF HORIZONTAL MEMBERS IS 45 INCHES OR GREATER
54	COMMENTARY FIGURE 305.2.6(2) VIOLATION—BARRIER (FENCE) HORIZONTAL MEMBERS TOO CLOSE COMMENTARY FIGURE 305.2.7 MAXIMUM OPENING WIDTH IN BARRIERS BUILT WITH CHAIN LINK FENCING COMMENTARY FIGURE 305.2.8 MAXIMUM OPENING WIDTH IN BARRIERS BUILT WITH DIAGONAL MEMBERS
55	COMMENTARY FIGURE 305.3 VIOLATION—WRONG SWING DIRECTION ON PEDESTRIAN ACCESS GATE
56	COMMENTARY FIGURE 305.3.3(1) LOCATION AND PROTECTION OF BARRIER GATE LATCH RELEASE WHERE LOCATED AT LESS THAN 54 INCHES ABOVE WALKING SURFACE COMMENTARY FIGURE 305.3.3(2) KEY CARD ENTRY ON GATE TO POOL AND SPA AREA MIGHT REQUIRE ALTERNATIVE METHOD APPROVAL
58	COMMENTARY FIGURE 305.4(1) STRUCTURE OR DWELLING WALL SERVING AS A BARRIER TO A POOL OR SPA
59	COMMENTARY FIGURE 305.4(2) ALARM DEACTIVATION DEVICE LOCATION FOR OPENING IN STRUCTURE OR DWELLING WALL SERVING AS BARRIER TO A POOL OR SPA SECTION 306 DECKS
60	TABLE 306.5 MINIMUM DRAINAGE SLOPES FOR DECK SURFACES
61	SECTION 307 GENERAL DESIGN
62	TABLE 307.2.2 RESERVOIRS AND SHELLS
63	SECTION 308 DIMENSIONAL DESIGN SECTION 309 EQUIPMENT SECTION 310 SUCTION ENTRAPMENT AVOIDANCE
64	SECTION 311 CIRCULATION SYSTEMS COMMENTARY FIGURE 311.2 TYPICAL RESIDENTIAL POOL AND SPA COMBINATION
65	COMMENTARY FIGURE 311.2.1(1) TYPICAL EQUIPMENT IN A CIRCULATION SYSTEM COMMENTARY FIGURE 311.2.1(2) CIRCULATION SYSTEM CURVES VERSUS PUMP CURVE COMMENTARY FIGURE 311.2.2 EXAMPLE OF ACCESS
66	COMMENTARY FIGURE 311.3 DETERMINING FLOWS IN PIPING TO DETERMINE PIPING VELOCITY
67	TABLE 311.4 CIRCULATION SYSTEM PIPE MATERIAL STANDARD COMMENTARY FIGURE 311.4.1 SUCTION OUTLET COVER
68	TABLE 311.4.1 CIRCULATION SYSTEM FITTINGS
69	COMMENTARY FIGURE 311.6 LOCATION OF GAUGES COMMENTARY FIGURE 311.7 TYPICAL FLOW METER DISPLAY PANEL SECTION 312 FILTERS
70	COMMENTARY FIGURE 312.1 TYPICAL FILTER TYPES COMMENTARY FIGURE 312.3.1(1) SAND FILTER WITH AIR RELEASE
71	COMMENTARY FIGURE 312.3.1(2) GRID FILTER WITH AIR RELEASE COMMENTARY FIGURE 312.3.2 SEPARATION TANK WITH FILTER TANK ARRANGEMENT SECTION 313 PUMPS AND MOTORS
72	COMMENTARY FIGURE 313.2 SINGLE- AND DOUBLE-PUMP CONFIGURATIONS
73	COMMENTARY FIGURE 313.7 EMERGENCY SHUTOFF FOR CIRCULATION PUMPS AND AIR BLOWERS SECTION 314 RETURN AND SUCTION FITTINGS COMMENTARY FIGURE 314.4 TYPICAL RETURN INLET
74	SECTION 315 SKIMMERS COMMENTARY FIGURE 315.2(1) SKIMMER OPENING IN WALL COMMENTARY FIGURE 315.2(2) PERIMETER OVERFLOW (GUTTER) SKIMMING SYSTEM
75	TABLE 315.3 SKIMMER SIZING TABLE COMMENTARY FIGURE 315.5(1) SKIMMER EQUALIZER LINE PROHIBITED COMMENTARY FIGURE 315.5(2) PERIMETER OVERFLOW (GUTTER) SKIMMING SYSTEM EQUALIZER PROHIBITED IF NEW CONSTRUCTION
76	SECTION 316 HEATERS COMMENTARY FIGURE 316.1 TYPICAL HEATER CONFIGURATIONS TABLE 316.2 WATER HEATERS
77	COMMENTARY FIGURE 316.4.1 TYPICAL TEMPERATURE CONTROL SECTION 317 AIR BLOWER AND AIR INDUCTION SYSTEM
78	SECTION 318 WATER SUPPLY SECTION 319 SANITIZING EQUIPMENT COMMENTARY FIGURE 319.1 TYPICAL SANITIZING EQUIPMENT ROOM SECTION 320 WASTEWATER DISPOSAL
79	COMMENTARY FIGURE 320.1(1) TYPICAL WASTEWATER DISPOSAL COMMENTARY FIGURE 320.1(2) AIR GAP AT WASTEWATER DISPOSAL POINT SECTION 321 LIGHTING
80	COMMENTARY FIGURE 320.1(3) AIR GAP AT WASTEWATER DISPOSAL POINT
81	COMMENTARY FIGURE 321.2.1 TYPICAL LABEL FOR LISTED AND LABELED PRODUCT
82	SECTION 322 LADDERS AND RECESSED TREADS
83	FIGURE 322.2 MINIMUM WATER DIVING ENVELOPE COMMENTARY FIGURE 322.3.2(1) LADDER AS VIEWED ABOVE THE WATERLINE COMMENTARY FIGURE 322.3.2(2) LADDER AS VIEWED BELOW THE WATERLINE
84	SECTION 323 SAFETY
86	CHAPTER 4: PUBLIC SWIMMING POOLS GENERAL COMMENTS PURPOSE SECTION 401 GENERAL TABLE 401.4 CONSTRUCTION TOLERANCES
87	SECTION 402 DIVING
88	TABLE 402.12 MINUMUM DIVING WATER ENVELOPES (SEE FIGURE 402.12)
89	FIGURE 402.12 (MINIMUM DIVING WATER ENVELOPES) CONSTRUCTION DIMENSIONS FOR WATER ENVELOPES FOR CLASS B AND CLASS C POOLS SECTION 403 BATHER LOAD TABLE 403.1 MAXIMUM BATHER LOAD SECTION 404 REST LEDGES
90	SECTION 405 WADING POOLS SECTION 406 DECKS AND DECK EQUIPMENT
92	SECTION 407 CIRCULATION SYSTEMS TABLE 407.2 TURNOVER RATE SECTION 408 FILTERS SECTION 409 SPECIFIC SAFETY FEATURES
93	COMMENTARY FIGURE 409.2 DEPTH MARKERS ON POOL DECK COMMENTARY FIGURE 409.2.2 DEPTH MARKER ON WALL OF POOL WITH PERIMETER OVERFLOW SYSTEM COMMENTARY FIGURE 409.2.4 BISECTED DEPTH MARKER ON WALL
94	COMMENTARY FIGURE 409.2.5 DEPTH MARKER ON POOL DECK COMMENTARY FIGURE 409.3 TYPICAL NO DIVING SYMBOL COMMENTARY FIGURE 409.4.1 BODY HOOK HANGING ON POOL BUILDING WALL
95	COMMENTARY FIGURE 409.4.2 RING BUOY WITH ATTACHED ROPE SECTION 410 SANITARY FACILITIES SECTION 411 SPECIAL FEATURES
96	COMMENTARY FIGURE 411.2 SHALLOW END STAIRS
97	SECTION 412 SIGNAGE
98	FIGURE 412.1 SAFETY SIGN COMMENTARY FIGURE 412.1 NO DIVING SIGN COMMENTARY FIGURE 412.2 TELEPHONE
100	CHAPTER 5: PUBLIC SPAS AND PUBLIC EXERCISE SPAS GENERAL COMMENTS PURPOSE SECTION 501 GENERAL COMMENTARY FIGURE 501.1(1) PUBLIC SPA COMMENTARY FIGURE 501.1(2) PUBLIC SPA SECTION 502 MATERIALS SECTION 503 STRUCTURE AND DESIGN
101	SECTION 504 PUMPS AND MOTORS SECTION 505 RETURN AND SUCTION FITTINGS
102	SECTION 506 HEATER AND TEMPERATURE REQUIREMENTS SECTION 507 WATER SUPPLY SECTION 508 SANITIZING, OXIDATION EQUIPMENT AND CHEMICAL FEEDERS SECTION 509 SAFETY FEATURES
103	COMMENTARY FIGURE 509.4 CLOCK FOR SPA USERS
104	CHAPTER 6: AQUATIC RECREATION FACILITIES GENERAL COMMENTS PURPOSE SECTION 601 GENERAL COMMENTARY FIGURE 601.3 AQUATIC RECREATION FACILITY SECTION 602 FLOORS
105	SECTION 603 MARKINGS AND INDICATORS SECTION 604 CIRCULATION SYSTEMS TABLE 604.2 TURNOVER TIME
106	TABLE 604.3 SURFACE SKIMMING SYSTEMS SECTION 605 HANDHOLDS AND ROPES
107	SECTION 606 DEPTHS SECTION 607 BARRIERS SECTION 608 NUMBER OF OCCUPANTS TABLE 608.1 OCCUPANT LOAD SECTION 609 TOILET ROOMS AND BATHROOMS
108	COMMENTARY FIGURE 609.3 POOL DECK SHOWER
109	SECTION 610 SPECIAL FEATURES TABLE 610.1 ENTRY AND EXIT LOCATIONS
110	COMMENTARY FIGURE 610.5.3 MARKING OF LEADING EDGE OF STEPS
112	SECTION 611 SIGNAGE COMMENTARY FIGURE 611.5.1 GENERAL FACILITY RULE SIGN COMMENTARY FIGURE 611.5.2 DIRECTIONAL SIGN
113	COMMENTARY FIGURE 611.8 EXAMPLE OF A PICTOGRAM
114	CHAPTER 7: ONGROUND STORABLE RESIDENTIAL SWIMMING POOLS GENERAL COMMENTS PURPOSE SECTION 701 GENERAL
115	SECTION 702 LADDERS AND STAIRS FIGURE 702.2 TYPICAL A-FRAME LADDER, TYPES A AND B
116	FIGURE 702.3 TYPICAL STAIRCASE LADDER, TYPE C
117	FIGURE 702.4 TYPICAL IN-POOL LADDER, TYPE D
118	FIGURE 702.5 TYPICAL IN-POOL STAIRCASE, TYPES E AND F
119	SECTION 703 DECKS
120	FIGURE 703.4 TYPICAL CANTILEVERED DECK SUPPORT FIGURE 703.6 WALK-AROUND DECK WIDTH SECTION 704 CIRCULATION SYSTEM
122	SECTION 705 SAFETY SIGNS
124	CHAPTER 8: PERMANENT INGROUND RESIDENTIAL SWIMMING POOLS GENERAL COMMENTS PURPOSE SECTION 801 GENERAL SECTION 802 DESIGN
125	SECTION 803 CONSTRUCTION TOLERANCES SECTION 804 DIVING WATER ENVELOPES TABLE 804.1 MINIMUM DIVING WATER ENVELOPE FOR SWIMMING POOLS DESIGNATED TYPES I-Vb SECTION 805 WALLS SECTION 806 OFFSET LEDGES
126	FIGURE 804.1 MINIMUM DIVING WATER ENVELOPE SECTION 807 POOL FLOORS
127	SECTION 808 DIVING EQUIPMENT
128	COMMENTARY FIGURE 808.2 MANUFACTURED DIVING EQUIPMENT
129	TABLE 808.12 DIVING PLATFORM OR APPURTENANCE HEIGHT ABOVE DESIGN WATERLINE SECTION 809 SPECIAL FEATURES
130	COMMENTARY FIGURE 809.8 SLOPED VANISHING EDGE WALL SECTION 810 CIRCULATION SYSTEMS SECTION 811 SAFETY FEATURES
131	COMMENTARY FIGURE 811.1 ILLUSTRATION OF SLOPE BREAK
132	CHAPTER 9: PERMANENT RESIDENTIAL SPAS AND PERMANENT RESIDENTIAL EXERCISE SPAS GENERAL COMMENTS PURPOSE SECTION 901 GENERAL COMMENTARY FIGURE 901.1 PERMANENT RESIDENTIAL SPA
133	SECTION 902 SAFETY FEATURES
134	CHAPTER 10: PORTABLE RESIDENTIAL SPAS AND PORTABLE RESIDENTIAL EXERCISE SPAS GENERAL COMMENTS PURPOSE SECTION 1001 GENERAL
136	CHAPTER 11: REFERENCED STANDARDS GENERAL COMMENTS PURPOSE
137	COMMENTARY FIGURE 11 REFERENCED STANDARDS
138	AHRI ANSI APSP ASCE/SEI ASME
139	ASTM CPSC
140	CSA IAPMO ICC
141	NEMA NFPA NSF UL
142	INDEX
146	ANSI/APSP/ICC-7 2013 AMERICAN NATIONAL STANDARD FOR SUCTION ENTRAPMENT AVOIDANCE IN SWIMMING POOLS, WADING POOLS, SPAS, HOT TUBS, AND CATCH BASINS
148	ANSI/APSP/ICC-7 2013 AMERICAN NATIONAL STANDARD FOR SUCTION ENTRAPMENT AVOIDANCE IN SWIMMING POOLS, WADING POOLS, SPAS, HOT TUBS, AND CATCH BASINS TITLE PAGE APPROVED
149	AMERICAN NATIONAL STANDARD IMPORTANT NOTICE ABOUT THIS DOCUMENT COPYRIGHT NOTICE
150	FOREWORD
152	CONTENTS
154	1. SCOPE 2. NORMATIVE REFERENCES 3. DEFINITIONS FIGURE 1 BRANCH PIPING
156	FIGURE 2 A SYSTEM CURVE
157	FIGURE 3A EXAMPLE OF UNBLOCKABLE SUCTION OUTLET FIGURE 3B EXAMPLE OF UNBLOCKABLE SUCTION OUTLET 4. GENERAL REQUIREMENTS FOR SUCTION ENTRAPMENT AVOIDANCE SYSTEMS AND COMPONENTS
158	FIGURE 4 SINGLE UNBLOCKABLE CHANNEL OUTLET TO SINGLE PUMP FIGURE 5 SINGLE UNBLOCKABLE CHANNEL OUTLET TO TWO PUMPS FIGURE 6 LARGE UNBLOCKABLE OUTLET OF ANY SHAPE TO SINGLE PUMP
159	FIGURE 7 SKIMMER, VENT THROUGH LID FIGURE 8 SKIMMER WITH EQUALIZER 5. NEW CONSTRUCTION
160	FIGURE 9 DUAL OUTLETS IN PARALLEL TO ONE PUMP FIGURE 10 DUAL OUTLETS IN PARALLEL TO DUAL PUMPS FIGURE 11 DUAL PARALLEL OUTLETS TO TWO PUMPS FIGURE 12 DUAL OUTLETS ON DIFFERENT PLANES
161	FIGURE 13 THREE OR MORE OUTLETS TO (A) SINGLE PUMP(S) FIGURE 14 THREE OR MORE OUTLETS IN PARALLEL, LOOPED PIPING FIGURE 15 SUMPS IN SERIES 6. EXISTING POOLS AND SPAS
163	APPENDIX A: SYMBOLS
164	APPENDIX B: FIELD CHECKLIST FOR IDENTIFYING SECTION ENTRAPMENT HAZARDS
167	FINDING THE MAXIMUM FLOW RATE OF AN EXISTING SYSTEM
168	APPENDIX C: ENTRAPMENT AVOIDANCE WARNING SIGN
169	APPENDIX D: SOURCES OF MATERIAL ANSI APSP ASTM IAPMO NFPA UL
171	BACK COVER
172	ICC-SRCC SOLAR RATING & CERTIFICATION CORPORATION
173	ICC premiumACCESS
174	ICC ASSESSMENT CENTER
175	ICC PLAN REVIEW SERVICES

Published By	Publication Date	Number of Pages
ICC	2018	175


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Standard Title	International Swimming Pool and Spa Code and Commentary
Published Code	ICC
Publication Date	2018
Pages Count	175

ICC ISPC Commentary 2018 1stPrint

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