| http://www.w3.org/ns/prov#value | - Minimum trench widths may be utilized by joining pipe outside of the trench and lowering it into the trench after adequate joint strength has been achieved. (Note: Refer to manufacturer's instructions for recommended set and cure times for solvent cement joints.) Trench widths will have to be wider where pipe is joined in the trench or where thermal expansion and contraction is a factor.
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