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Dear Tech Abby:  Do I have to use a crushed stone backfill for my PVC sewer pipe installation?  --That 70’s EngineerDear That 70’s Engineer:  Good question… the answer is “maybe”…Well, let me expand on that.  First, when talking about PVC sewer pipe, remember that PVC products are commonly used in both gravity flow sanitary and storm sewer

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Every sewer has them… every few hundred feet… you can’t avoid it if you are in the sewer industry... Got a guess?... That’s it… MANHOLES. Ahh yes, the beautiful window to our lovely sewer underworld.One of the most common questions asked by those first getting involved in the sanitary or storm sewer industry is, “How do you connect a profile walled

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