Checks back flow of water and sewer gas | Full-flow design | This valve is designed for low pressure sump pump applications and can be mounted either vertically or horizontally | No pipe threading is required | The flexible union slips over ABS, PVC, steel pipe or copper pipe and the couplings on the 1-1/4" to 1-1/2" size can be mounted in either configuration on either end for connecting dissimilar size pipe diameters | The flexible couplings isolate motor noise from the piping and the internal flapper design reduces water hammer when the pump shuts off | The neoprene flapper is weighted with
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