Tampa Waterproofing Contractors:
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A brief article about waterproofing as told by a top contractor in Tampa, FL
When installing waterproofing, if the pipes differ in outside diameter, you can get a special flexible rubber coupling held with worm drive band clamps at your local hardware store. EAch side of the coupling fits one of the pipes. To cast iron hubs - in each case the pipe should e the same size as the cast iron hub for a good fit. The best way is to make what's called a caulked joint using Genova Plastic Lead. The use of Plastic Lead saves buying and melting lead. It also keeps you from being burned by hot, molten lead.
Here's how to make a caulked joint: Start by packing rope oakum into the bottom of the joint between the pipe and hub. Tamp tightly using a plumber's corking tool and a machinist's hammer. If you don't have such a tool, a large screwdriver may be used as a substitute. The hard-packed oakum should fill the joint of within 1" of the top. It alone should be tight enough to prevent leaking. The addition of Genova Plastic Lead or molten lead helps keep the oakum in place. Contact the waterproofers at the number above anywhere in Tampa.