Backflow troubleshooting guide

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Problem. Cause. Should valve be replaced? Solution. A. Valve spits periodically Troubleshooting Guide. Reduced Pressure Backflow Preventers. Backflow Repair &. Troubleshooting Questions. #10. ▫ I am testing the. Check Valve and the needle keeps falling to 0. Is there something wrong with my. Testing Procedures &. Trouble Shooting Guide. Double Check Backflow Preventer. (½” – 2”). First Check Valve Test. 1) Bleed all test cocks.#1 check poppet stem not moving freely in poppet guide. a. Pressure uctuations or water hammer from supply. a. #2 shut-o valve not closed completely. Field Testing the Double Check • Manual Progress. Troubleshooting • New Members. B. Questions and. Answers about backflow preventer until they.