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The pipe to be buried shall be of heavy schedule. Below grade compression couplings shall have an outer shell of A1SI 300 series stainless steel or material of equal corrosion resistance. All piping and fittings shall be free of scratches. Underground piping, fittings and compression couplings shall be protected from direct contact with the earth or backfill material.
All safe pan material and construction shall meet the requirements set forth in Sections 18-29-702.6.1 through 18-29-702.6.2.
Safe pans shall be made only of lead, copper, PVC or fiberglass, and shall meet the following requirements:
1. Lead sheets for safe pans shall weigh at least four pounds per square foot;
2. Copper sheets for safe pans shall weigh at least 12 ounces per square foot;
3. PVC safe pans or liners shall be 30 ml or 40 ml.
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