../screenshots/pipe-costs-table.png" alt="pipe-costs-table.png" />
</p>
<p><span class="figure-number">Figure 19: </span>The pipe costs table</p>
</div>

<p>
Each row in the pipe costs table describes the cost of installing a length of flow <i>and return</i> pipe of a given diameter (Nominal Bore). When the model chooses to install a pipe, it will select the first row from this table whose capacity exceeds the diversified peak capacity that pipe needs to carry.
</p>

<p>
The columns are:
</p>

<dl class="or