| Ed Pawlowski <esp@snet.xxx>: Mar 05 09:19PM -0500 On 3/5/2021 5:58 PM, Jim Wilkins wrote: > swimming pool to refill it in the spring, to raise the level high enough > to filter out the leaf debris, dead bugs, bird crap and green algae. The > owner had covered the pool but a seam ripped. The companies that make backflow preventers has some good lobbyists. At work we had to have them on all pressure vessels, like boilers. Our boilers had much higher pressure than the town water system. At home we have to have them on the lawn sprinklers. I pay $25 a year for someone to come out and inspect it. Never saw the guy but there is a new tag on it and a bill in the mail. I'd like to see good some statistics on how much good they do. This gives a number but does not say if it is one year or a hundred years. https://www.plumbtimesc.com/the-importance-of-having-a-backflow-prevention-device-at-home-or-work/ A report by the CDC confirmed that more than 1006 people across 19 states in the US had some form of sickness related to water contamination. Contaminated water can spread diseases in a split second due to the interconnection of water systems. Backflows tend to redirect contaminated water in homes. |
| Bob F <bobnospam@gmail.com>: Mar 05 06:23PM -0800 On 3/5/2021 2:26 PM, Jim Wilkins wrote: > "Water pressure may fail or be reduced when a water main bursts, pipes > freeze, or there is unexpectedly high demand on the water system (for > example, when several fire hydrants are opened)." Anti-siphon devices are REQUIRED for most water systems to protect everyone from contaminated water being siphoned into the water supply when a water supply failure occurs. |
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