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#1
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Backflow preventer (protecting potable water supply)
I seem to see three types of backflow preventers:
1. valve + vacuum breaker 2. double-check-valves 3. double-check-valves + pressure regulator If I don't need or want pressure regulation how do you compare 1 vs 2 above? This would be for lawn irrigation or water-powered sump pump. Examples: https://www.homedepot.com/p/Zurn-3-4...720A/100197627 https://www.homedepot.com/p/Febco-3-...-850/205888731 https://www.homedepot.com/p/Apollo-3...4A2F/307723094 |
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#2
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Backflow preventer (protecting potable water supply)
On 1/12/2019 10:14 PM, Davej wrote:
I seem to see three types of backflow preventers: 1. valve + vacuum breaker 2. double-check-valves 3. double-check-valves + pressure regulator If I don't need or want pressure regulation how do you compare 1 vs 2 above? This would be for lawn irrigation or water-powered sump pump. Examples: https://www.homedepot.com/p/Zurn-3-4...720A/100197627 https://www.homedepot.com/p/Febco-3-...-850/205888731 https://www.homedepot.com/p/Apollo-3...4A2F/307723094 If you've not done so already, check your local codes to see if they specify one type. Some do not allow double check, others do. |
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#3
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Backflow preventer (protecting potable water supply)
On Saturday, January 12, 2019 at 10:34:21 PM UTC-6, Ed Pawlowski wrote:
On 1/12/2019 10:14 PM, Davej wrote: I seem to see three types of backflow preventers: 1. valve + vacuum breaker 2. double-check-valves 3. double-check-valves + pressure regulator If I don't need or want pressure regulation how do you compare 1 vs 2 above? This would be for lawn irrigation or water-powered sump pump. Examples: https://www.homedepot.com/p/Zurn-3-4...720A/100197627 https://www.homedepot.com/p/Febco-3-...-850/205888731 https://www.homedepot.com/p/Apollo-3...4A2F/307723094 If you've not done so already, check your local codes to see if they specify one type. Some do not allow double check, others do. Will do. I think the vacuum-breaker approach seems more logical. |
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#4
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Backflow preventer (protecting potable water supply)
On Sunday, January 13, 2019 at 1:33:48 PM UTC-5, Davej wrote:
On Saturday, January 12, 2019 at 10:34:21 PM UTC-6, Ed Pawlowski wrote: On 1/12/2019 10:14 PM, Davej wrote: I seem to see three types of backflow preventers: 1. valve + vacuum breaker 2. double-check-valves 3. double-check-valves + pressure regulator If I don't need or want pressure regulation how do you compare 1 vs 2 above? This would be for lawn irrigation or water-powered sump pump. Examples: https://www.homedepot.com/p/Zurn-3-4...720A/100197627 https://www.homedepot.com/p/Febco-3-...-850/205888731 https://www.homedepot.com/p/Apollo-3...4A2F/307723094 If you've not done so already, check your local codes to see if they specify one type. Some do not allow double check, others do. Will do. I think the vacuum-breaker approach seems more logical. That's what's used here, NJ for irrigation connection. I would bet it's probably part of the widely used national plumbing code. |
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