​Today I’ll share with you water level valves

1.The thread

The thread should be Smooth and burr-free

2.The size

The size should be right to your pipe, usually have ½’’,3/4’’ and 1in

3.The material

Plastic material have PA66, pom,and pc, the whole body should No smell, no plastic dust

The part that doesn’t itchy when you touch it

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