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WK1212
AWWA C518, Double disc check valves, wafer type
WK2211
BS5153, EN12334, 45° Flexible check valves, FL x FL
WK2231
BS5153, EN12334, 90° Swing check valves, FL x FL
WK2241
BS5153, EN12334, 90° Swing check valves with lever & weight, FL x FL
WK2213
BS5153 Ball check valves, FL x FL
WK3211
DIN3202 F6, 45° Flexible check valves, FL x FL
WK3231
DIN3202 F6, 90° Swing check valves, FL x FL
WK3241
DIN3202 F6, 90° Swing check valves with lever & weight, FL x FL
WK3213
DIN3202 F6, Ball check valves, FL x FL
WK1211
AWWA C508, 45° Flexible check valves, FL x FL
WK1231
AWWA C508 / MSS SP-71, 90° Swing check valves, FL x FL
WK1241
AWWA C508 / MSS SP-71, 90° Swing check valves with lever & weight, FL x FL
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