Okay to blow out sprinklers through Backflow? | Terry Love Plumbing Advice & Remodel DIY & Professional Forum
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What am I missing when blowing out water from my sprinkler system? - Home Improvement Stack Exchange
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Industrial Style Plug to Male NPT Fittings | Adapters to Winterize Blow out Backflow Preventer and Pressure Vacuum Breaker (PVB) for Sprinkler System (Solid Lead-Free Brass) - Walmart.com
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Minimprover Lead -Free Brass 16.9" Winterize Sprinkler System RV Motorhome Boat Camper and Travel Trailer: Air Comp Quick-Connect Plug To 3/4" Garden Hose Faucet Blow Out Adapter Fitting with Valve
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