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This clear flapper type check valve is used as a sight glass on an Edson Pump Out Hose and as flapper valves for controlling the flow of liquid in and out of the Edson Vacuum System transfer tanks. If required it can be used as a back-up flapper valve on an Edson Diaphragm Pump and it will insure zero back flow on a pump out hydrant. Made of clear PVC with Viton® elastomer for the flapper it has 1.5" MNPT (Male National Pipe Threads) on the in-flow and on the out-flow 1.5" FNPT (Female National Pipe Threads).(Viton® is a registered trademark of E. I. DuPont.)
Posted by chase cobble on Aug 1st 2019
ordered the clear check valve for 1.5 line and got the parts but no way to connect the new check valves to the existing 90 ball valve. Called Edson and was told it should've came with a part to connect the two female ends but didn't and I should just go to home depot and buy something to make it work. yup, that's right they told me to go buy a piece after spending almost $300. I will never do business with Edson again!!!!