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The layout for the filter pit was completed today. The Nexus filters were placed in the filter pit to help determine placement for the plumbing. A change was made to the original plumbing design. The 4" ball valves for flushing the drain lines are much larger than I thought so they could not be placed the way I had designed (see the last photo and compare the valve size to my sneakers). The solution was to drop them down below the filter pit floor in valve boxes. This actually makes for a much cleaner filter pit area. The photos below show the new layout of the flush lines. After each 4" flush valve, a section of 4" clear PVC is used to allow the flushed water to be viewed. The big 4" ball valves have large handles so they are easily opened and closed. The Nexus filters will actually be a bit higher once the filter pit slab is poured and will have a 4" slide valve prior to the inlet. You can also see the 2" pipe for the Nexus waste lines. The inner and outer chamber drain lines and the outlet polisher drain line for each Nexus will be connected to the 2" lines. An overflow line will also be connected to one of them. Tomorrow morning the filter pit floor drain will be put in place, rebar installed and the concrete poured. The pond bottom slab will be poured as well. I think the filter pit Carl, John and Bob are building will be just as slick as the pond.
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Henry
Orlando, FL
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01-16-2006
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