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  <!-- Core Pages -->
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    <loc>https://buildcalcapp.com/</loc>
    <changefreq>weekly</changefreq>
    <priority>1.0</priority>
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  <url>
    <loc>https://buildcalcapp.com/about</loc>
    <changefreq>monthly</changefreq>
    <priority>0.5</priority>
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  <!-- Calculators (HIGH VALUE) -->
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    <loc>https://buildcalcapp.com/dfu-calculator</loc>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
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  <url>
    <loc>https://buildcalcapp.com/vent-calculator</loc>
    <changefreq>weekly</changefreq>
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    <loc>https://buildcalcapp.com/vent-distribution</loc>
    <changefreq>weekly</changefreq>
    <priority>0.8</priority>
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  <url>
    <loc>https://buildcalcapp.com/drain-slope</loc>
    <changefreq>weekly</changefreq>
    <priority>0.8</priority>
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  <url>
    <loc>https://buildcalcapp.com/water-pipe-size</loc>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
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  <url>
    <loc>https://buildcalcapp.com/cleanout-calculator</loc>
    <changefreq>weekly</changefreq>
    <priority>0.8</priority>
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  <url>
    <loc>https://buildcalcapp.com/hot-water-wait-time</loc>
    <changefreq>weekly</changefreq>
    <priority>0.7</priority>
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  <url>
    <loc>https://buildcalcapp.com/water-pressure-loss-calculator</loc>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
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  <url>
    <loc>https://buildcalcapp.com/pipe-volume-calculator</loc>
    <changefreq>weekly</changefreq>
    <priority>0.8</priority>
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  <!-- SEO / RESOURCE PAGES -->
  <url>
    <loc>https://buildcalcapp.com/upc-vs-ipc</loc>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>

  <url>
    <loc>https://buildcalcapp.com/what-code-does-my-state-use</loc>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
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  <url>
    <loc>https://buildcalcapp.com/3-inch-pipe-dfu</loc>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
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  <url>
    <loc>https://buildcalcapp.com/4-inch-sewer</loc>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
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  <!-- LEGAL (low priority but required) -->
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    <loc>https://buildcalcapp.com/privacy-policy</loc>
    <changefreq>yearly</changefreq>
    <priority>0.3</priority>
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  <url>
    <loc>https://buildcalcapp.com/terms-of-use</loc>
    <changefreq>yearly</changefreq>
    <priority>0.3</priority>
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