AWWA C714-13 pdf download.Cold-Water Meters for Residential Fire Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes
AWWA C714-13 describes cold-water meters used for residential fre sprinkler appli- cations that meet the requirements of NFPA 13D in single- and two-family dwellings and manufactured homes, in sizes 3⁄4 in. (20 mm) through 2 in. (50 mm), and the materials and workmanship employed in their fabrication. Meter types addressed in this standard for the purpose stated in Sec. 1.2 are positive displacement-type meters meeting the requirements of ANSI/AWWA C700 or C710, turbine-type meters meeting the requirements of ANSI/AWWA C701, multijet-type meters meeting the requirements of ANSI/AWWA C708, singlejet-type meters meeting the requirements of ANSI/AWWA C712, and fuidic-oscillator-type meters meet- ing the requirements of ANSI/AWWA C713.
4.1.1 Choice of materials. Te composition of alloys in this section is sub- ject to commercially acceptable tolerances. Sections 4.1.2 through 4.1.9 do not require any specifc material, but cite examples of materials typically used in the construction of water meters. Te listings are not intended to be all-inclusive and should not be used to limit the use of other materials. When reference is made to ANSI, ASTM, AWWA, or other standards, it shall be understood that the latest revision thereof shall apply unless the date of the standard is also specifcally listed for a particular reason.
Materials shall be selected for their strength and resistance to corrosion and shall not impart to the water objectionable taste or odor, or toxic substances in normalized concentrations exceeding the maximum contaminant levels (MCLs) as defned by the US Environmental Protection Agency (USEPA).
Materials used in the construction of register-box rings and covers shall have sufcient dimensional stability to retain operating clearances at working tempera- tures up to 105°F (40°C) and shall not permanently warp or deform when exposed to temperatures up to 150°F (66°C) for 1 hr.
4.1.4 Measuring cages or chambers. Measuring cages or chambers shall be made either of a copper alloy containing not less than 85 percent copper, such as UNS C89520 or UNS C89836 as listed in ASTM B584; or of a suitable engineer- ing plastic, such as polyphenylene oxide (PPO) in accordance with ASTM D4349 or polystyrene (PS) in accordance with ASTM D4549.AWWA C714-13 pdf download.