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In Friday Fax issue #722 we introduced a new video on the alternate FST Foam saturation method. We explained that one reason this method might be preferred is its ability to stop flowing water in a conduit. Now we're back with another lab video demonstrating specifically how to do just that: Seal a Conduit with Active Running Water. The demo shows how to block water flowing at an impressive rate of approximately 1 gallon per minute. After preparing the duct interior by cleaning off any loose material or slime with a wire brush, damming material is cut to size and saturated with FST Foam in a plastic bag. The FST is then kneaded to fully coat the damming strips and activate the expanding foam. The saturated strips are then installed in the duct end as instructed. Holding the strips in place allows the foam to expand and seal the conduit, halting the water flow. Applied in this manner, FST Foam can seal up to 90 feet of water head in conduit. Gloves are a must for this alternate application method. It is a bit messier than the standard method. This is also why the video is such an important sales tool. You can show the video instead of volunteering to do a field demo. Customers can view the video and decide whether this method fits their circumstances. |
