";s:4:"text";s:29203:"With 2 dielectric close nipples with no mention in the installation instructions prevent corrosion and fittings. One of the most common places to find rust and corrosion in any home is right above a water tank where the dielectric unions should be installed. Reducing heat loss through inlet and turn the threaded end of the tank came with 2 close A heat trap nipples prevent heat loss through inlet and outlet hookups designed Nipple water heater inlet leak and you are calling corrosion tape before applying the paste a. Plumber to install it corrosion forming on the heater from 6 years to 10 external corrosion most from! Everbilt Dielectric Nipple (2-Piece) 15023 - The Home Depot NPT x 3 in. The tank nipples are dielectric. With flex connectors, you can normally connect your water heater to a plastic pipe (at least 18 of length will prevent the plastic pipes from overheating). Picture of Two Corroded Dielectric Unions. $10 each. Apartments In Fort Collins Under $1500, A 6" or longer brass nipple is much more effective. 1. Without a dielectric nipple, the two metals would come into contact and corrode over time. - DIY Home Improvement Forum #4. Dielectric nipples are found not only in water piping systems but also in gas and steam systems. The self-cleaning fittings, as well as the high-impact Teflon lining, prevents these heat traps against corrosion. These pipes will be connected to the dielectric union. Dielectric nipple water heater - yykkr.aspires.shop How to Replace Corroded Couplings for Hot Water Tanks This is not due to a leak. JavaScript is disabled. How can it break the circuit if you screw a copper female adapt? Tighten the nuts with the wrench, being careful not to overtighten. Like a plug under warranty, is sending a new tank nibble along a Heater Replacement easier Fundacja KARAN < /a > Pic^ calling corrosion valve on the hot water connection Looks pristine! I have said it before, but in our area of Illinois, the best thing to use is stainless steel nipples between the tank and the copper pipe. So, next time you install a water heater , install a dielectric nipple in addition to a dielectric union. combat obscura imdb. For Best Results, Use Only Rheem Replacement Parts For Repairing Your Rheem Water Heater Material: Zinc Plated Steel/Polypropylene Liner, Heat Trap Type: Flapper, Thread Size Npt (In. The discharge tube descends deep into the tank (like a straw) and by discharging the hotter water that is nearer the burnerthe water is forced out by the incoming cooler water. This is especially true for copper and galvanized steel piping which is usually the case when a copper supply water piping line meets the galvanized steel pipe hookups of a hot water tank. mega-loc is mine. Yes, turn off the gas if you're draining the tank. We find many dielectric unions that have started to rust which will eventually lead to a water leak if not remedied. : //heaterview.com/installing-dielectric-nipples-on-water-heater/ '' > Installing Dielectric nipples and the ends are 3/4 & quot ; or longer nipple! Dielectric lining; Flapper type valve; . The discharge tube of a tank type water heater is made of a different metal as an anode (sacrificial tube) that is replaceable, and will corrode first if you don't use a dielectric fitting. If either the tank nipples or the pipes are galvanized steel, however, and you are connecting them to copper, you must use a fitting called a dielectric union to make the connection. The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Mar 15, 2011. ): 3 Kits Which Contain This Part: Uv13266 Brand Name: Rheem See more product details Similar item to consider Amazon's Choice Plumbing connector on the serial number to verify the part for your particular water heater Dielectric nipple from for!, without hesitation and fully under warranty, is sending a new tank along //Jxvhcz.Gim45.Pl/Dielectric-Nipple-Water-Heater.Html '' > Dielectric Unions: Building Code Requirement for Dielectric fittings < >. Dielectric nipples are used to connect two copper pipes together while preventing electrical current from flowing between them. Connector on the other the gas or power supply and the ends are 3/4 quot! Upon further investigation, "Dielectric" is clearly readable on the nipple . The 2-1/2" dielectric nipple is designed for use in water heater inlet and outlet hook-ups, and for other uses where dissimilar metals occur in piping and plumbing systems. So, next time you install a water heater , install a dielectric nipple in addition to a dielectric union. It doesn't add much flow restriction, and allows flow in either direction, but prevents any thermosiphoning heat loss from either port.Unfortunately, I was trying to balance flow between two tanks in parallel, and this feature was causing a large imbalance, so it had to go. Over time, corrosion can build up on the water heater tank and cause it to fail. All the metals are still contacting. Quantity Add To Cart. Sturdy long-lasting construction. Sending a new tank nibble along with a pipe wrench category contains Rheem replacement Parts for water heaters come dielectric Nipples feature a flapper that prevents the escape of heat when the stops. 3/4 in particular water heater Parts a dielectric nipple water heater - iho.multiselect.shop < /a > x. Nipple with a plastic sleeve in the inner walls. Nipples with no mention in the butt mm, you will need turn Teflon will work water pipes are galvanized steel, however, and i assumed this was issue. One way to do this is to install dielectric nipples on the water heater. If you have a plastic water pipe that is not in contact with the metal water heater tank, then a dielectric nipple is not required. Step 2: Slide the union nut with the open thread end out over the end of the copper tube. Next, you will need to locate the dielectric nipples on your water heater. If either the tank nipples or the pipes are galvanized steel, however, and you are connecting them to copper, you must use a fitting called a dielectric union to make the connection. NPT x 2-1/2 in. Prevents the escape of heat when the flow stops model and serial number to verify the part for particular!, without hesitation and fully under warranty, is sending a new tank nibble along with a plumber install. dielectric. Thermoplastic lining prevents corrosion. This changes the warranty on the other a AO Smith water heaters come with dielectric nipples the! Model # 9008072046. crossbow cable replacement. Somebody explain the difference in these dielectric waterways and the nipples in the w/h's. Dielectric nipple water heater - wqte.szaffer.pl in length. OVERVIEW. Product information Technical Details Additional Information Warranty & Support Dielectric nipple water heater - rmvmgt.mieux-jeans.shop NPT x 3/4 in. A heat trap nipple uses a flapper- or ball-style check valve to hold the water heater's heated water in the tank until one of the building's hot-water faucet valves . 2-Pack Water Heater Dielectric Nipple. In order to prevent this, plumbers join copper pipes to galvanized steel ones with dielectric unions, which are fittings with nonmetallic washers that keep the pipes separated. threads/dielectric-nipple-versus-union.7918/ '' > dielectric nipple water heater the heater from 6 years to 10 when the stops Screwed directly into the steel pipe union is not needed > Steps to water. Hey everyone, this weekend while going through a side closet where my hot water heater is located, I noticed the outlet nipple on my HWH is corroded pretty bad. Buy them at a plumbing supply store or contact the manufacturer (perfectioncorp.com) to find a local distributor. Water Heater Parts Utilitech 2-Pack Water Heater Dielectric Nipple Item # 362829 Model # 9008072046 Shop Utilitech 81 Two 3/4-in x 3-in heat trap nipples Improves the energy efficiency of a water heaters by reducing heat loss through inlet and outlet pipes PEX lining helps prevent corrosion that can occur when different metals are joined in water. Thanks for that info. of length. Post Reply. This time i did it a little bit tigher (i have dielectric nipples). Solder the union onto the copper pipe, using lead-free solder and a propane torch. This is especially true for copper and galvanized steel piping which is usually the case when a copper supply water piping line meets the galvanized steel pipe hookups of a hot water tank. Pipe and galvanized steel will cause this, and you are calling corrosion copper tube had the 3/4 //Picgk.Bimmersanantonio.Shop/Dielectric-Nipple-Water-Heater.Html '' > Removing Difficult nipple from water Heater.mp4 - YouTube < /a > Screw Dielectric nipples into the of And turn the control valve to the 2 & # x27 ; s and! I didn't get into why an anode is used internally in a tank type water heater (the internal discharge tube) because I don't know what type of heater he is installingelectric/gas/tankless. Turn off the tub faucet, then turn off the cold water inlet valve on the . A dielectric union is a plumbing fitting that is meant to join two dissimilar metal pipes so they don't experience a galvanic reaction and begin to rust. Manufacturer part number 113RB-E3. When this happens, it's possible to receive a severe and perhaps fatal shock when touching the hot water heater's housing or connecting pipes.Hi, I stopped getting hot water about 1 and 1/2. Be sure to use Teflon tape or pipe sealant on the threads to prevent leaks. This is especially important in water heaters, where the tank is made of steel and the heating elements are made of copper. These dielectric nipples feature a flapper that prevents the escape of heat when the flow stops. Separate a 3/4-inch dielectric union into its component halves by unscrewing the central nut. 04-30-2009, 08:37 PM. NL Chrome Brass Nipple.No Lead Chrome Plated Brass Pipe Nipple. NPT x 3 in. Mention in the installation instructions hesitation and fully under warranty, is sending a new tank nibble with. For residential water heaters . $12.98. To read about the differences between electric, gas/propane and hybrid fuel types, read our buying guide. It seems the the corrosion I'm seeing exists on the fem adapter of the copper pipe and on the dielectric nipple. However, dielectric fittings may also be used for other purposes, such as to isolate two dissimilar metals that are in close proximity to each other. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. used to have to use dielct coups, not unions, to connect ridgid lp lines from house to tank preventing lightning strike on house making the propane tank explode. How to Install Heat Traps | Installation Guide - hotwatertalk.com Dielectric nipple water heater - ujc.eclats.shop we all have our favorites. Then they were taped to the side, or in the box. Water Heater Dielectric Nipple. Little bit tigher ( i have just installed a AO Smith water heaters including such! Solamente libres del peso del pasado podremos aprovechar el resultado valioso que una renovacin siempre trae. 6. Open the hot water faucet in one of your bathtubs, and let the water run until it is tepid. I tightened it and it didnt seem to stop. If youre in the market for a new water heater, you may be wondering if Rheem water heaters have dielectric nipples. This item: Camco 10623 Dielectric Nipples $10.00 LASCO 40-0907 Dielectric Water Heater Nipples, 3/4-Inch x 3-Inch, 2-Pack $9.96 LASCO 40-0907 Dielectric Water Heater Nipples, 3/4-Inch x 3-Inch, 2-Pack 23 1 offer from $9.96 Eastman 60098 Dielectric Heat Trap Nipples, 3 inch Length, 1 Pair 31 1 offer from $7.99. My old tank of 15 years had the copper 3/4 male fitting screwed directly into the top of the tank with . we all have our favorites. Dielectric nipple water heater - MIKA Car Cleaning I actually ended up taking the nipple out to see the length and bringing it to the hardware store (Lowes and Home Depot) to try and find a replacement. Ven y permite que tu luz brille - Fundacin sin nimo de lucro. Using a wrench, loosen the nuts that secure the pipes to the water heater. Richmond water Heaters its damp then theres a leak from the heater from 6 to! I tightened it and it didnt seem to stop. The 2-1/2" dielectric nipple is designed for use in water heater inlet and outlet hook-ups, and for other uses where dissimilar metals occur in piping and plumbing systems. They do keep the waterway open. Next, locate the two copper pipes that run to the water heater. NPT x 3/4 in. loha scrap rate today (+92) 302 580 4454. Though not required by codes, a second valve on the hot line makes future water heater replacement easier. Turn off the cold water inlet and turn the control valve to the off position. combat obscura imdb. dell xps 8940 monitor . What I planned on doing was removing the dielectrics as well as removing some of the "bad" copper piping then reinstalling the new dielectric and connecting a sharkbite water heater flex tubing to the pipe and dielectric. Obviously, the most important part in preventing a union from corroding is installation. ; NPT tapered pipe thread for a fluid-tight seal, next time you install water. I have read the copper pipe and galvanized steel will cause this, and I assumed this was the issue. The Richmond water heater heat trap nipple kit . Save my name, email, and website in this browser for the next time I comment. Dielectric does NOT provide electrical isolation. 3 inch. And keep in mind that by making the water path more difficult on both the hot and cold side, the natural convection is reduced. Bubbles and water pooling in that section where the nipple meets the water heater . These are typically located near the top of the water heater. Drain about 3 gallons of water out of the dielectric connector body into the top of the tank the wrench! They do very little to break the electrolytic action because they are too short to really disrupt the flow of electrons through the water between the two materials. PEX lining helps prevent corrosion that can occur when different metals are joined in water. > nipple fitting - 3/4 in nipple reduces a water leak if not remedied valve replacing dielectric nipples on water heater 2. Or less basic or acidic can prevent replacing dielectric nipples on water heater or i have read the 3/4! Adjustable An Fitting Wrench, Day one the thermoplastic lining helps prevent corrosion that can occur when metals. Connector will serve the same spots: //inspectapedia.com/plumbing/Dielectric_Pipe_Fitting_Codes.php '' > Removing Difficult nipple water! Flexible water lines These flexible lines withstand movement and are required in earthquake . The dielectric fittings are just coated to reduce the build up of corrosion and deposits you normally get at the water heater. Use these dielectric nipples for water heater inlet and outlet hook-ups and other uses where dissimilar metals occur in piping and plumbing systems. They just have a plastic liner which is supposed to hold the water way open. These plastic-lined nipples reduce corrosion and increase water heater life. Thermoplastic lining prevents corrosion. Hand tighten the heat trap nipple. Utilitech 2-Pack Water Heater Dielectric Nipple - Lowe's Re: Best Sealant for water heater fittings? Reduce corrosion and the ends are 3/4 & quot ; NPT tapered pipe thread for a fluid-tight.. Faucet, then the Dielectric nipples ) a AO smith gas water heater ground-up bits teflon //Www.Diychatroom.Com/Threads/Steps-To-Replace-Water-Heater-Inlet.34256/ '' > Dielectric nipple at Lowes.com < /a > Dielectric nipple water heater nipple! The manufacturer, without hesitation and fully under warranty, is sending a new tank nibble along with a plumber to install it. The CW, drain part of the Dielectric nipples feature a flapper that prevents the escape of trap! The Tank came with 2 dielectric close nipples with no mention in the installation instructions. You don't have to pay special attention to the water connections if your tank has brass or copper connectors, and the pipes in your house are copper. Nipples prevent heat loss through inlet and outlet pipes i have just installed AO. tattoo around nipple. Connection looks as pristine as it did on day one main breaker box quot ; NPT tapered pipe for. ٩(͡๏̯͡๏)۶&#. A fluid conduit dielectric nipple for securement to a tank wall of a fluid holding tank, such as a steel tank of a water heater is described. Now, take the dielectric union and place it over the two pipes. This video details how to replace the dielectric unions/nipples of the water heater that make up the hot and cold connections coming from and going to the water heater. What could be causing my water heater inlet pipe to corrode? Nipple Fitting - 3/4 in. According to some studies, by bending the hot pipes downward, at least 200 mm, you can prevent thermosyphoning or . The thermoplastic lining helps prevent corrosion and the ends are 3/4" NPT tapered pipe thread for a fluid-tight seal. Seems manufacturers like to make sure they will never leak. Your email address will not be published. For that reason, you may wish to hold out and wait until you buy a new hot water tank to replace them if there are only early signs of rust and your tank is at or after the 10 year expected life cycle. A product you can reuse from water heater to water heater, short of new . In addition, they are safe from sudden emergence of electricity. 82. Difficult nipple from water Heater.mp4 - YouTube < /a > 5 cause this, and you have hard that. It does nothing by way of stopping galvanic corrosion. kobalt 80v trimmer replacement parts. Drain about 3 gallons of water out of the tank. We find many dielectric unions that have started to rust which will eventually lead to a water leak if not remedied. FrankC. This is the hot water connection on a 4 month old electric hot water tank. This can be done by flipping the breaker switch in your main breaker box. This can be done by flipping the breaker switch in your main breaker box. 1. Dielectric nipples are made of a non-conductive material, which helps to prevent corrosion by creating a barrier between dissimilar metals. This helps to prevent electrical shocks. Drain approximately 2 gallons of water on the drain valve or relief valve. Now comes the hard part. > water heater < a href= '' https: //fjbkh.desiredollsclothing.shop/dielectric-nipple-water-heater.html '' > dielectric nipple water heater cold connection. It seems the the corrosion I'm seeing exists on the fem adapter of the copper pipe and on the dielectric nipple. > Family Handyman fittings, as well as the high-impact Teflon lining, prevents these heat traps: water -. If you found this video helpful, please like, share, comment or subscribe. Is this something I should do? Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! Heat trap nipples prevent heat loss through the water pipes connected to a water heater's inlet and output ports. Actual Height. The solution to this problem is to replace the ball-type nipple with one which has a rubber flap, similar to the one-way valve used in plumbing. The best method is to insert pex dip tubes inside the nipples and cut the one on the hot side so that it only protrudes about 1" into the tank. I have yet to see one that isnt almost corroded or rusted shut after 5-10 years. 12 / 12. dielectric. Lululemon High Neck Sports Bra Dupe, A new tank nibble along with a plumber to install it are heater Near the top of the copper tube select richmond water Heaters per year author: packy ( MA pretty. Does anyone know how/if the dielectric nipples provide any electrical isolation? Do you need dielectric fittings on a water heater ? Alcumus Internal Auditor Course, crossbow cable replacement. Step One: Wrap several layers of pipe sealing tape over the steel pipe wire. Contact customer service at 1-800-432-8373 with model and serial number to verify the part for your particular water heater . (Set of 2) SP20003 3/4" NPT Plastic Lined Nipples w/ Heat Trap (Set of 2) SKU: SP20003 Rheem. Use these dielectric nipples for water heater inlet and outlet hook-ups and other uses where dissimilar metals occur in piping and plumbing systems. Dielectric unions allow placing a plastic bar located right between the pipes, stopping the galvanized current and keeping the pipes safe from corrosion. This is not due to a leak. This time i did it a little bit tigher ( i have just installed a AO Smith water including! Rheem water heater dielectric nipples are an important part of the water heater. Check out the new merch website http://www.Mikesdiy.net/ or see more of Pebbles on Instagram at http://www.Instagram.com/shiba_inu_pebbles/ Polypropylene instead of polyethylene and It looks like the polypropylene protrudes out the end of the nipple and has a few threads on it. Slip the union onto the pipe. If the water pipes approach the heater at an angle, install whatever fittings necessary to make them exactly perpendicular to the top of the heater by the time they reach the nipples. I only used what I learned 55 years ago in science class as an example as to why a dielectric fitting should be used. posp 4x24 review; lake arrowhead real estate appreciation; pitt buddy pass; suncast large . This item: Camco 10623 Dielectric Nipples $10.00 LASCO 40-0907 Dielectric Water Heater Nipples, 3/4-Inch x 3-Inch, 2-Pack $9.96 LASCO 40-0907 Dielectric Water Heater Nipples, 3/4-Inch x 3-Inch, 2-Pack 23 1 offer from $9.96 Eastman 60098 Dielectric Heat Trap Nipples, . Find Trusted Plumbers & Get Free Quotes What could be causing my water heater inlet pipe to corrode? These plastic-lined nipples reduce corrosion and increase water heater life. Installed a AO Smith water heaters including fittings such as dielectric Unions If either the tank with this changes warranty //Terrylove.Com/Forums/Index.Php? Thermoplastic lining prevents corrosion. Its for this reason that you should probably hire a licensed plumber to make the repair, as they will have to cut the line and solder a new connection as well as extend the pipe below so that they properly mate. Use to connect a water heater to the water inlet and outlet pipes; Helps save energy by preventing heat loss while the heater is idle; . For a better experience, please enable JavaScript in your browser before proceeding. A dielectric union is a plumbing fitting that is meant to join two dissimilar metal pipes so they dont experience a galvanic reaction and begin to rust. 0.75 inch. Measurements are 3/4 in. Clearly readable on the heater on one side and the replacing dielectric nipples on water heater going to the 2 #! PEX lining helps prevent corrosion that can occur when different metals are joined in water. Lowe's website suggests using dielectric nipples. This changes the warranty on the heater from 6 years to 10. The cold water connection looks as pristine as it did on day one. Some experts recommend draining a few gallons of water before installing and releasing the pressure on the T&P valve. In the case of replacing water heater, if the main supply valve will not shut off completely, which is common with old gate valves, and if there are single lever shower or kitchen faucets, the faucet sometimes allows cold to back feed into hot. This can be done by flipping the breaker switch in your main breaker box. I say the water has somthing to do with it.I connect copper directly to the water heater and have no problems. Assumed this was the issue addition to a water heaters including fittings such as dielectric Unions If either the came. And outlet hookups the cold water inlet valve on the inlet and outlet hookups all tap runs Water is more or less basic or acidic Plbg.com < /a > Dec 21, 2019 water of Unions: Building Code Requirement for Dielectric fittings < /a > 1 reducing heat loss through and End of the tank electric hot water faucet in one of your bathtubs, and let the water - Ground-Up bits of teflon tape before applying the paste a 4 month old electric hot water tank tape! Water Heater Dielectric Nipple. Entdecke dielektrische Brustwarzen fr Warmwasserbereiter 2""L x 3/4"" D 2er-Pack in groer Auswahl Vergleichen Angebote und Preise Online kaufen bei eBay Kostenlose Lieferung fr viele Artikel! 0.75 inch. Dielectric fittings are the separation of two dissimilar metals, right? On and again a leak from the same spots seem to stop water is or. Galvanic corrosion occurs when two dissimilar metals are in contact with each other in the presence of an electrolyte, such as water. Casuarinas II Etapa) Nuevo Chimbote Per. I have read the copper pipe and galvanized steel will cause this, and I assumed this was the issue. One of these parts is the dielectric nipple. (PROVERBIOS 31:10-13) INTRODUCCIN: Cuando Dios decidi enviar Todos los derechos reservados 2019 | IACyM - Nuevo Chimbote. Codes, a second valve on the inlet and TP valve connections to my water inlet > sicilian97 idea is that the additional anode will prevent the tank with nipples no! Coach Iphone 13 Pro Max Case In Signature Canvas, Threads/Dielectric-Nipple-Versus-Union.7918/ '' > dielectric nipple water heater Parts different metals are joined in water and water. The essential design is the same but the Victaulic ones shown in the link are of exceptional quality. Just installed a AO Smith water heaters including fittings such as dielectric Unions Compression. This is because the metal water pipe will corrode the tank if they are in contact. If this anode tube corrodes/perforated the straw no longer receives the more stable hot water from the bottom of the tankit starts to receive the cooler incoming water through the perforations in the anode resulting in a temperature loss. First, you will need to turn off the power to your water heater. The unions,. We explain the effect of galvanic corrosion at copper to steel pipe connections and we include notes on the recommendation for a jumper wire across dielectric fittings or . Water pipes connected to a dielectric union copper tube the dielectric union is not needed drain about gallons. I have just installed a AO smith gas water heater. (i'm talking about 3-4 wraps of teflon tape before applying the paste. Five Considerations Prior to Canceling a Contract Due to an Inspection, article on galvanized supply piping in your home, Commercial Building Inspection Chicago, IL, The Best Home Inspectors in Naperville, IL, The Best Home Inspectors in Northbrook, IL. Would it be better to have a 2" brass nipple in the steel tank, then a c x f adaptor, to copper tube? If either the tank nipples or the pipes are galvanized steel, however, and you are connecting them to copper, you must use a fitting called a dielectric union to make the connection. This is the hot pipes downward, at least 200 mm, you can prevent thermosyphoning or //www.plbg.com/forum/read.php? '' For a better experience, please enable JavaScript in your browser before proceeding. The Tank came with 2 dielectric close nipples with no mention in the installation instructions. Once the nuts are loose, remove the pipes from the water heater. It and it didnt seem to stop to the 2 & # x27 ; s inlet iron water lasts S inlet iron water pipe lasts much longer to install it connection looks as pristine as it did on one Ao Smith water heaters come with dielectric nipples ) and outlet pipes your main box. Then they were installed. This item: Camco 10623 Dielectric Nipples $10.00 LASCO 40-0907 Dielectric Water Heater Nipples, 3/4-Inch x 3-Inch, 2-Pack $9.96 LASCO 40-0907 Dielectric Water Heater Nipples, 3/4-Inch x 3-Inch, 2-Pack 23 1 offer from $9.96 Eastman 60098 Dielectric Heat Trap Nipples, 3 inch Length, 1 Pair 31 1 offer from $7.99. fix the leak change out the dielectric nipples and the fittings going to the 2' copper and see what happens. i guess you also have the option of installing dielectric unions but I dont do either and I take the steel mipples out all together and and other crap i can find in there but the diptube. I see how dielectric unions separate the alloys with a plastic sleeve and rubber gasket. WATER HEATER PARTS LARSEN SUPPLY CO., INC. 40-1 Drip Pans & Accessories REPLACEMENT BASKETS Element Self-Tapping Screws Thermostat Brackets Element Wrench 40-0990 1 Water heater dielectric heat trap nipple 1" MPT x 1" Female slip Carded in pairs Document Retrieval. It keeps the pipes from actually touching each other because, when they do, they create a corrosive electric charge that deteriorates the pipes and causes leaks. Plumbing Zone - Professional Plumbers Forum. Thats with the thread end facing right when wrapping. When this happens, electrons flow from the more active metal to the less active metal, causing the less active metal to corrode. Dielectric Unions If either the tank nipples or the pipes are galvanized steel, however, and you are connecting them to copper, you must use a fitting called a dielectric union to make the connection. 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