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2. Hydropneumatic device - Wikipedia

   en.wikipedia.org/wiki/Hydropneumatic_device

   Hydropneumatic refers to the pneumatic (gas) and hydraulic (water) components needed for operation of the devices. Hydropneumatic accumulators or pulsation dampeners are devices which prevent, but do not absorb, alleviate, arrest, attenuate, or suppress a shock that already exists, meaning that these devices prevent the creation of a shock wave ...

3. Plumbing & Drainage Institute - Wikipedia

   en.wikipedia.org/wiki/Plumbing_&_Drainage_Institute

   The Plumbing & Drainage Institute (PDI) is an association of American manufacturers of engineered plumbing drainage specialty products.Such products include floor drains, roof drains, sanitary floor drains, cleanouts, water hammer arresters, swimming pool drains, backwater valves, grease interceptors, fixture supports, and other drainage specialties. [1]

4. Water hammer - Wikipedia

   en.wikipedia.org/wiki/Water_hammer

   The water hammer principle can be used to create a simple water pump called a hydraulic ram. Leaks can sometimes be detected using water hammer. Enclosed air pockets can be detected in pipelines. The water hammer from a liquid jet created by a collapsing microcavity is studied for potential applications noninvasive transdermal drug delivery. [33]

5. Costco’s Gas Prices Are So Low That It Just Expanded Hours To ...

   www.aol.com/costco-gas-prices-low-just-163150222...

   Costco members can still get a good deal at the pump despite rising oil prices. To keep up with demand, the company has changed location hours, opened new locations and continues to install a ...

6. Here’s How Costco Keeps Their Gas So Cheap - AOL

   www.aol.com/costco-keeps-gas-cheap-210012252.html

   The list of reasons why Costco is one of the best places to shop just keeps getting longer. But the one thing that tops the list for the majority of their customers is the low Costco gas price.

7. Backflow prevention device - Wikipedia

   en.wikipedia.org/wiki/Backflow_prevention_device

   Backflow prevention device. The simplest, most reliable way to provide backflow prevention is to provide an air gap.An air gap is simply an open vertical space between any device that connects to a plumbing system (like a valve or faucet) and any place where contaminated water can collect or pool.