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Hot Water Heater Spec Addition CZQZ160015 stainless steel flush type access cover plates. Round access covers shall be provided and secured to plugs with securing screw. Square access covers may be provided with matching frames, anchoring lugs and cover screws. Cleanouts in finished walls shall have access covers and frames installed flush with the finished wall. Cleanouts installed in finished floors subject to foot traffic shall be provided with a chrome-plated cast brass, nickel brass, or nickel bronze cover secured to the plug or cover frame and set flush with the finished floor. Heads of fastening screws shall not project above the cover surface. Where cleanouts are provided with adjustable heads, the heads shall be [cast iron] [or] [plastic].
3.2 WATER HEATERS AND HOT WATER STORAGE TANKS
3.2.1 Relief Valves
No valves shall be installed between a relief valve and its water heater or storage tank. The P&T relief valve shall be installed where the valve actuator comes in contact with the hottest water in the heater. Whenever possible, the relief valve shall be installed directly in a tapping in the tank or heater; otherwise, the P&T valve shall be installed in the hot-water outlet piping. A vacuum relief valve shall be provided on the cold water supply line to the hot-water storage tank or water heater and mounted above and within 6 inches above the top of the tank or water heater.
3.2.2 Installation of Gas- and Oil-Fired Water Heater
Installation shall conform to NFPA 54 for gas fired and NFPA 31 for oil fired. Storage water heaters that are not equipped with integral heat traps and having vertical pipe risers shall be installed with heat traps directly on both the inlet and outlet. Circulating systems need not have heat traps installed. An acceptable heat trap may be a piping arrangement such as elbows connected so that the inlet and outlet piping make vertically upward runs of not less than 24 inches just before turning downward or directly horizontal into the water heater's inlet and outlet fittings. Commercially available heat traps, specifically designed by the manufacturer for the purpose of effectively restricting the natural tendency of hot water to rise through vertical inlet and outlet piping during standby periods may also be approved.
3.2.3 Heat Traps
Piping to and from each water heater and hot water storage tank shall be routed horizontally and downward a minimum of 2 feet before turning in an upward direction.
3.2.4 Connections to Water Heaters
Connections of metallic pipe to water heaters shall be made with dielectric unions or flanges.
3.2.5 Expansion Tank
A pre-charged expansion tank shall be installed on the cold water supply between the water heater inlet and the cold water supply shut-off valve.
The Contractor shall adjust the expansion tank air pressure, as recommended by the tank manufacturer, to match incoming water pressure.
SECTION 22 00 00 Page 23
| DIVISION 22 - PLUMBING |
| PLUMBING, GENERAL PURPOSE |
| PART 1 GENERAL |
| 1.1 REFERENCES |
| 1.2 SUBMITTALS |
| 1.3 STANDARD PRODUCTS |
| 1.3.1 Alternative Qualifications |
| 1.3.2 Service Support |
| 1.3.3 Manufacturer's Nameplate |
| 1.3.4 Modification of References |
| 1.3.4.1 Definitions |
| 1.3.4.2 Administrative Interpretations |
| 1.4 DELIVERY, STORAGE, AND HANDLING |
| 1.5 PERFORMANCE REQUIREMENTS |
| 1.5.1 Welding |
| 1.5.2 Cathodic Protection and Pipe Joint Bonding |
| 1.6 REGULATORY REQUIREMENTS |
| 1.7 PROJECT/SITE CONDITIONS |
| 1.8 INSTRUCTION TO GOVERNMENT PERSONNEL |
| 1.9 ACCESSIBILITY OF EQUIPMENT |
| PART 2 PRODUCTS |
| 2.1 PRODUCT SUSTAINABILITY CRITERIA |
| 2.1.1 Water-Efficient Products |
| 2.1.2 Energy-Efficient Water Heaters |
| 2.2 Materials |
| 2.2.1 Enter Appropriate Subpart Title Here |
| 2.3 VALVES |
| 2.3.1 Wall Hydrants Frostproof |
| 2.3.2 Yard Hydrants |
| 2.3.3 Relief Valves |
| 2.3.4 Thermostatic Mixing Valves |
| 2.4 WATER HEATERS |
| 2.4.1 Automatic Storage Type |
| 2.4.1.1 Oil-Fired Type |
| 2.4.1.2 Gas-Fired Type |
| 2.4.1.3 Electric Type |
| 2.4.1.4 Indirect Heater Type |
| 2.4.2 Instantaneous Water Heater |
| 2.4.3 Electric Instantaneous Water Heaters Tankless |
| 2.4.4 Phenolic Resin Coatings for Heater Tubes |
| 2.4.4.1 Standard Product |
| 2.5 HOT-WATER STORAGE TANKS |
| 2.6 DOMESTIC WATER SERVICE METER |
| 2.7 POOL WATER PUMP SAFETY VACUUM RELEASE SYSTEM SVRS |
| 2.8 ELECTRICAL WORK |
| 2.9 MISCELLANEOUS PIPING ITEMS |
| 2.9.1 Escutcheon Plates |
| 2.9.2 Pipe Sleeves |
| 2.9.2.1 Sleeves in Masonry and Concrete |
| 2.9.2.2 Sleeves Not in Masonry and Concrete |
| 2.9.3 Pipe Hangers Supports |
| 2.9.4 Nameplates |
| 2.9.5 Labels |
| PART 3 EXECUTION |
| 3.1 Enter Appropriate Subpart Title Here |
| 3.1.1 Enter Appropriate Subpart Title Here3.1.1.1 Thrust Restraint |
| 3.1.1.2 Commercial-Type Water Hammer Arresters |
| 3.1.2 Dissimilar Pipe Materials |
| 3.1.3 Corrosion Protection for Buried Pipe and Fittings |
| 3.1.4 Pipe Sleeves and Flashing |
| 3.1.4.1 Sleeve Requirements |
| 3.1.4.2 Flashing Requirements |
| 3.1.4.3 Waterproofing |
| 3.1.4.4 Optional Counterflashing |
| 3.1.4.5 Pipe Penetrations of Slab on Grade Floors |
| 3.1.4.6 Pipe Penetrations |
| 3.1.5 Fire Seal |
| 3.1.6 Supports |
| 3.1.6.1 General |
| 3.1.6.2 Pipe Supports and Structural Bracing, Seismic Requirements |
| 3.1.6.3 Pipe Hangers, Inserts, and Supports |
| 3.1.6.4 Structural Attachments |
| 3.1.7 Welded Installation |
| 3.1.8 Pipe Cleanouts |
| 3.2 WATER HEATERS AND HOT WATER STORAGE TANKS |
| 3.2.1 Relief Valves |
| 3.2.2 Installation of Gas- and Oil-Fired Water Heater |
| 3.2.3 Heat Traps |
| 3.2.4 Connections to Water Heaters |
| 3.2.5 Expansion Tank |
| 3.3 VIBRATION-ABSORBING FEATURES |
| 3.4 WATER METER REMOTE READOUT REGISTER |
| 3.5 IDENTIFICATION SYSTEMS |
| 3.5.1 Identification Tags |
| 3.5.2 Pipe Color Code Marking |
| 3.5.3 Color Coding Scheme for Locating Hidden Utility Components |
| 3.6 PAINTING |
| 3.6.1 Painting of New Equipment |
| 3.6.1.1 Factory Painting Systems |
| 3.6.1.2 Shop Painting Systems for Metal Surfaces |
| 3.7 TESTS, FLUSHING AND DISINFECTION |
| 3.7.1 Defective Work |
| 3.7.2 Operational Test |
| 3.7.3 Disinfection |
| 3.8 POSTED INSTRUCTIONS |
| 3.9 PERFORMANCE OF WATER HEATING EQUIPMENT |
| 3.9.1 Storage Water Heaters |
| 3.9.1.1 Electric |
| 3.9.1.2 Gas |
| 3.9.1.3 Oil |
| 3.9.2 Unfired Hot Water Storage |
| 3.9.3 Instantaneous Water Heater |
| 3.9.3.1 Gas |
| 3.9.3.2 Oil |
3.9.4 Pool Heaters
3.10 TABLES