AWWA C702-15 pdf download.Cold-Water Meters—Compound Type
4.1.8 External fasteners (casing bolts, studs, nuts, screws, and washers). Exter- nal fasteners shall be made of a copper alloy containing not less than 57 percent copper; or of stainless steel in accordance with ASTM A276 or ASTM A582; or of steel that is treated to resist corrosion by a process acceptable to the purchaser.
4.1.9 Companion fanges. Companion fanges shall be made of cast iron, such as those listed in ASTM A48, A126, or A536; or when so specifed by the pur- chaser, of a copper alloy containing not less than 75 percent copper, such as UNS C89510, C89520, C89833, or C89836, or a similar copper alloy as listed in ASTM B584; or of stainless steel in accordance with ASTM A276; or of a cast austenitic stainless steel as listed in ASTM A351.
4.1.10 Automatic valves. Te valve weights shall be made of a copper alloy containing not less than 75 percent copper, such as UNS C89510, C89520, C89833, or C89836, or a similar copper alloy as listed in ASTM B584; or of a completely enclosed and sealed copper-alloy shell loaded with lead; or of a stainless steel as listed in ASTM A580. Te valve and supplemental hinge pins or spindles shall be made of a copper alloy containing not less than 75 percent copper, such as ASTM B584; or of stainless steel as listed in ASTM A580 or ASTM A276; or of monel. Valve and supplemental weight-hinge bearings shall be bushed with hard rubber as classifed in ASTM D2000; bronze in accordance with ASTM B139; or other suitable bushing material. If the valve contains a clapper, it shall have a replaceable seat of semihard rubber in accordance with ASTM D2000 or other suitable resilient materials that are compatible with potable water. Valve seats shall be made of a copper alloy containing not less than 75 percent copper, such as UNS C89510, C89520, C89833, or C89836, or a similar copper alloy as listed in ASTM B584; or of a cast austenitic stainless steel as listed in ASTM A351; or shall be made of a suitable engineering plastic, such as acetal in accordance with ASTM D4181, polyphenylene ether in accordance with ASTM D4349, PC in accordance with ASTM D3935; or of other suitable noncorrosive materials.AWWA C702-15 pdf download.