Works as expected. Good price compared to the hardware store. While they can be a nuisance, I recommend using them - 1) they help protect the integrity of the water supply and water pressure for everyone, and 2) they are required by law in many parts of the country. My old one was probably 14 and I had to use a Dremmel tool to loosen a rusty set screw (seen in a YouTube video). I have a lot of hard water in my throat sticking these things together. I didn't use a set screw on the new ones so I could quickly remove them for cleaning or replacement (I think the set screw is mostly there to keep people from removing it).
60 Inch Brushed Nickel Shower Hose Replacement - Ideal For Shower Or Bidet Sprayer With Simple Installation
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Backflow Preventers Protection, 24”W X 24”H Backflow Winter Cover, Insulated Cover Pouch For Irrigation Backflow Valve, Sprinkler Valves In Snow Or Sun Exposure, Winterizing Backflow Preventers – SAND
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1" Malleable Cast Iron Black Floor Flange 20 Pack Fit For Steampunk Furniture,Industrial Supplies, Floral, Lamps, Hanging Racks, Shelves DIY And So On
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Adult Shooting Ear Protection Earmuffs - Noise Cancelling Safety Ear Muffs For Hearing Reduction
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Unclog With Ease: Flexible Toilet Grabber Tool With 4 Jaws And Stainless Steel Pole
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