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About product and suppliers:
        Alibaba.com offers 1,431 duckbill check valve products. About 66% of these are valves, 14% are pipe fittings, and 13% are other rubber products. 

A wide variety of duckbill check valve options are available to you, such as check, control, and angle. You can also choose from rubber, casting, and brass. As well as from water, gas, and acid. And whether duckbill check valve is normal temperature, medium temperature, or high temperature. 

There are 1,433 duckbill check valve suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Ireland, and Turkey, which supply 99%, 1%, and 1% of duckbill check valve respectively. 

Duckbill check valve products are most popular in Domestic Market, Mid East, and Western Europe. 

You can ensure product safety by selecting from certified suppliers, including 1,431 with ISO9001, 276 with Other, and 252 with ISO14001 certification.
        
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