Pipe dope generally is the choice of professionals because of its effectiveness on the various types of copper pipe used for water and plastics used for drains, you’ll find it in most plumbers’ tool kits. They don’t fully harden, so they can compensate for some degree of movement or pressure changes. It’s the most versatile of pipe thread sealants and highly effective in most situations. Pipe dope, also known as pipe joint compound, is a thick, brushable paste often compared with putty. That’s not a problem with many materials, but it can make PVC threads too “slippery,” leading to damage from overtightening. Telfon usually is not recommended for PVC because it lubricates the threads. There are varieties for air, water, and gas pipes. PTFE tape is highly flexible and easy to apply to all kinds of metal pipe threads. It’s commonly known as Teflon, though strictly speaking that’s a trade name. PTFE is short for polytetrafluoroethylene, a synthetic polymer. Pipe thread sealants divide broadly into three types: PTFE tapes, pipe dope, and anaerobic resins. The following product features and shopping considerations can help determine which pipe thread sealant to purchase. Various products can’t handle the pressures or temperatures involved in some situations. The best pipe thread sealant for one material is sometimes not appropriate for another. The aim is to prevent leaks, but the ways in which to achieve that can vary considerably. Photo: What to Consider When Choosing the Best Pipe Thread Sealant BEST FOR EMERGENCIES: Rectorseal 25790 1-3/4-Ounce Tube No.5 Pipe Thread.BEST FOR GASES: Harvey 017065 Gas Line PTFE Thread Seal Tape.BEST FOR PVC: Rectorseal 23631 1/4 Pint Brush Top T Plus 2 Pipe.BEST FOR WATER: Oatey 31230 Pipe Joint Compound with PTFE with Brush.BEST BANG FOR THE BUCK: Dixon Valve TTB75 PTFE Industrial Sealant Tape.BEST OVERALL: Gasoila – SS16 Soft-Set Pipe Thread Sealant with PTFE.The following list looks at the best pipe thread sealant for a number of applications. In many cases, pipe thread sealants offer a rapid and comparatively low-cost solution. Apply a sealant as a preventive measure or as a repair to prevent further leaks. Rather than replace entire sections of pipe, you can seal the thread with a range of products. A leak in a gas pipe has potentially lethal consequences. In a water pipe, that could mean flood damage running into thousands of dollars. Any of these conditions can cause a leak. Threads might wear from pressure changes or when subjected to vibration. One cause might be expansion and contraction, a cycle that happens when pipes freeze and thaw. Depending on the material, they can safely transport all manner of fluids and gases while withstanding extreme environments and high pressures. Threads are a remarkably efficient mechanical device, ideal for connecting pipework.
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