w*m
发帖数: 1806 | 1 In Houston, TX
是否需要满足以下求？
＿ Anti-siphon valves required
＿ Frost line below 6 in.
Check with your city, county, state or water municipality agencies to
determine if Anti-siphon valves are required in your area and if the frost
line is below 6 inches. If the answer is yes to either one or both questions
check the appropriate boxes.
第一个肯定是要的，第二个呢？
另外sprinkler system是不是接在水表和房子的进水开关 的中间？
thx. |
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