| Landscape contractor Roger Cook asks host Kevin O’Connor, general contractor Tom Silva, and plumbing and heating expert Richard Trethewey to guess what this large, black, plastic disc might… |   From: This Old House     Views: 40       6 ratings   | |
| Time: 01:47 | More in Howto & Style | 
from Blogger http://maxbchu.blogspot.com/2015/04/what-is-it-black-plastic-disc.html
 

 
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