Copper piping system in a building with intumescent firestop being installed by an insulator, <a href="//commons.wikimedia.org/wiki/Vancouver" title="Vancouver">Vancouver</a>, <a href="//commons.wikimedia.org/wiki/British_Columbia" title="British Columbia">British Columbia</a>, <a href="//commons.wikimedia.org/wiki/Canada" title="Canada">Canada</a>.
<a href="//commons.wikimedia.org/wiki/User:Achim_Hering" title="User:Achim Hering">Achim Hering</a>
2007-05-22
<span class="int-own-work" lang="en">Own work</span>