Mueller copper tube - Our plastic-coated copper tube eliminates the need for on-site tape wrapping or sleeving, creating a savings on labor and ensuring a professional-looking installation. It can be used in a …

 
Streamline ® Copper Tube provides the strength, precision and cleanliness needed for the demanding conditions of HVAC and refrigeration applications. Preferred thought the industry, our products have set the benchmark for HVACR copper tube. Streamline ® Nitrogenized ® ACR Copper Tube is pressurized with nitrogen to provide maximum …. Intel chronicles

Copper Tube for HVACR Applications. Streamline® Refrigeration Service Tube is of a consistent dead soft temper, bright, thoroughly dried/dehydrated and packed in shrink wrapping plus individual cartons for the highest level of protection. For use in HVACR and mechanical applications. Made to applicable ASTM standards B280.A02708 2D/Revit/CAD. Streamline® Copper Solder-Joint Fittings for supply/pressurized systems have been the leading brand of copper fittings for over 80 years. Available in both wrot copper and cast bronze, our product selection has grown to become the most extensive in the industry. We are the acknowledged experts at engineering and ...DOWNLOADS. Copper Iron Tube for Refrigeration Applications. Streamline ® XHP TM Copper Iron Tube for use in refrigeration applications. Available sizes ranging from 3/8" to 2-5/8" for continuous 90 Bar / 1,300 PSI pressure ratings or 130 Bar / 1885 PSI pressure ratings at 120°C / 250°F. 1 - 10 of 10 | Results Per Page | View.We also distribute air-conditioning and refrigeration copper tube under the Mueller brand. Mueller Europe is a wholly-owned subsidiary of Mueller Industries, a multi-billion dollar revenue company that is publicly traded …Quality, consistency and reliability have made the Streamline ® brand trusted and specified all around the world. For use in above-ground potable water supply systems. Constructed of high-grade copper or bronze materials. Made to applicable ASME standards B16.15, B16.18, B16.22, B16.24, B16.50, B1.20.1. Wrot fittings meet NSF 61G.ABOUT US. Mueller Streamline Co. is a company of Mueller Industries, Inc. that provides products supporting the plumbing, HVAC, refrigeration, PVF, and other markets. Headquartered in Collierville, TN, the company’s flagship products are Streamline® copper tubing, line sets, copper fittings, valves, and related items.Back to all Companies. Servicing the plumbing, refrigeration, industrial and HVAC markets for 60 years, Great Lakes Copper LTD manufactures a full line of copper tubing for potable water, air conditioning, medical and aftermarket applications, plastic-coated copper, PEX rings and EZ-Roll Line Sets for air conditioning and ductless systems ...Ideal for durability and strength, the Mueller Streamline 3/4 in. x 60 in. Copper Type M Pipe is perfect for residential services. Used for thicker wall tube. It can be used behind walls inside a home to route water from a service line and water heater to a fixture.Copper Tube for HVACR Applications. Streamline® Refrigeration Service Tube is of a consistent dead soft temper, bright, thoroughly dried/dehydrated and packed in shrink wrapping plus …Product Description. Mueller Europe supply airconditioning and refrigeration tube, branded under the worldfamous Mueller name, to specification EN127351. The tube is supplied in straight length sizes from 3/8 up to 4.1/8 diameter.The tube has been specially cleaned and nitrogen charged to render it suitable for HVAC and refrigeration purposes.Jul 15, 2019 ... Mueller Co. provides utility and plumbing contractors with one of the broadest product lines of water service connections for distribution ...The UK based manufacturer of Wednesbury Copper Tube. Copper tubes for plumbing, heating and a wide range of industrial applications. Wednesbury Tube is a wholly owned subsidiary of Mueller Industries Inc, Memphis USA and operates from a site in Bilston, Great Britain. In recent years Mueller Industries has implemented a substantial capital ...A leading name in SMART and efficient flow control solutions, Mueller Streamline® Co. provides copper products for plumbing, HVAC, refrigeration, PVF and other markets. Leminar offers a wide range of Mueller Streamline products, including copper tubing, line sets, copper fittings, and related items.Mueller Industries' Streamline® XHP system consists of copper-iron alloy tube and fittings specially designed to manage the extended high pressures and ...ABOUT MUELLER STREAMLINE CO. Our Company Copper Tube Line Sets Fittings Find a Rep Contact. DOWNLOADS. Catalogs/Brochures Price Lists Technical Information Submittals CAD/BIM . Mueller Industries Terms of Sale(Kitco News) - Copper producer First Quantum announces $1 billion senior notes offeringRead more on 'Kitco' Indices Commodities Currencies Stocks Copper Tube for HVACR Applications. Streamline ® Refrigeration Service Tube is of a consistent dead soft temper, bright, thoroughly dried/dehydrated and packed in shrink wrapping plus individual cartons for the highest level of protection. For use in HVACR and mechanical applications. Made to applicable ASTM standards B280. Mueller Streamline® Coupling Rolled Stop (C x C) (19) Streamline ® Copper Solder-Joint Fittings for supply/pressurized systems have been the leading brand of copper fittings for over 80 years. Available in both wrot copper and cast bronze, our product selection has grown to become the most extensive in the industry. Quality, consistency and reliability have made the Streamline ® brand trusted and specified all around the world. For use in above-ground potable water supply systems. Constructed of high-grade copper or bronze materials. Made to applicable ASME standards B16.15, B16.18, B16.22, B16.24, B16.50, B1.20.1. Wrot fittings meet NSF 61G. Copper Pipes, Fittings, Flanges, Valves & Accessories. We stock products of the leading brands in the industry, which include Mueller Industries, Pegler, ITAP, Flowflex, Fillimori, E.G.Kistenmacher, Bailey Products & Alpha. Copper Pipes. COPPER PIPES TO EN1057 (PREVIOUSLY BS 2871/1) FOR HOT & COLD WATER PLUMBINGIncludes 10 ft. ( $2.47 /ft.) $24.71. Buy 10 or more $19.77 /ft. Mueller streamline product that is IAPMO certified. Mueller streamline product is NSF approved. Made in the USA. View More Details. South Loop Store. 187 in stock Aisle 08, Bay 001. Back to all Companies. Servicing the plumbing, refrigeration, industrial and HVAC markets for 60 years, Great Lakes Copper LTD manufactures a full line of copper tubing for potable water, air conditioning, medical and aftermarket applications, plastic-coated copper, PEX rings and EZ-Roll Line Sets for air conditioning and ductless systems ... streamline copper tube. co2 refrigeration; plumbing; hvacr; medical gas; specialty tube; streamline fittings. acr copper press; carbon steel press; copper solder-joint; prs copper …Manufactured in accordance with applicable standards, our ongoing commitment to quality continues to make Streamline® Copper Tube the preferred and specified brand of industry professionals. For use in plumbing, mechanical, and DWV applications. Made to meet ASTM standards B88 and B306. Meets NSF 61G. Made in the USA. Specifications. Dimensions./product/mueller-bk-d06010p-mueller-streamline-refrigerator-copper-tubing/446386.OF TANZANIA United States Minor Outlying Islands UNITED STATES OF AMERICA URUGUAY UZBEKISTAN VANUATU VATICAN CITY VENEZUELA VIETNAM VIRGIN ISLANDS (BRITISH) VIRGIN ISLANDS (U.S.A.) WALLIS & FUTUNA ISLANDS WESTERN SOMOA YEMEN ZAMBIA ZIMBABWE. Phone Number. Browse Copper Iron Fittings in … Streamline Plumbing Wholesale Catalog. Download. Streamline HVACR Wholesale Catalog. Download. Streamline Carbon Steel Press Fittings – Catalog. Download. Streamline ACR Copper Press Fittings – Catalog. Download. Mueller Refrigeration Products Technical Catalog. Copper Tube Supplier - Mueller, is specialized in supplying air conditioning and refrigeration spare parts such as copper tube, copper pipe, and copper fittings. We also supply building materials such as Rockwool, insulated PU jacketing, Superlon & Insulflex insulation sheet, aluminium flexible duct, and aluminium semi rigid duct.When it comes to purchasing a new home, one cannot underestimate the importance of thorough inspections. Mueller Home Inspections are known for their expertise in assessing the con...Browse Item # D 05050, Dehydrated Coil, 5/16" OD x 50' in the Mueller Industries Inc. catalog including Item #,Item Name,Description,Type,Standards,Weight,Material,Operating Temperature,Operating Pressure,Item Size,HVACR (OD) Size,Length,Style,Qty PcFor your next HVAC or Refrigeration project use Mueller 3/8 in. x 20 ft. ACR Hard Copper Tubing. This copper tube is charged Under Pressure with 99.9% Pure ... Our plastic-coated copper tube eliminates the need for on-site tape wrapping or sleeving, creating a savings on labor and ensuring a professional-looking installation. It can be used in a wide variety of situations including reclaimed water applications and the movement of natural gas. For use in protecting copper. Mueller Streamline® 90° Elbow Short Radius Reducing (C x C) (15) Streamline ® Copper Solder-Joint Fittings for supply/pressurized systems have been the leading brand of copper fittings for over 80 years. Available in both wrot copper and cast bronze, our product selection has grown to become the most extensive in the industry. Manufactured in accordance with applicable standards, our ongoing commitment to quality continues to make Streamline® Copper Tube the preferred and specified brand of industry professionals. For use in plumbing, mechanical, and DWV applications. Made to meet ASTM standards B88 and B306. Meets NSF 61G. Made in the USA. Specifications. Dimensions. Quality, consistency and reliability have made the Streamline ® brand trusted and specified all around the world. For use in above-ground potable water supply systems. Constructed of high-grade copper or bronze materials. Made to applicable ASME standards B16.15, B16.18, B16.22, B16.24, B16.50, B1.20.1. Wrot fittings meet NSF 61G.Customers specify Yorkshire Copper Tube when quality and performance count. They thereby enjoy peace of mind using products that can be trusted to last. ... A Mueller Industries Company. Follow us on Social Media. Site created by Brand Newark. Yorkshire Copper Tube is Registered in England 2045485 - VAT Registration No. GB 687 834 963. Quality, consistency and reliability have made the Streamline ® brand trusted and specified all around the world. For use in above-ground potable water supply systems. Constructed of high-grade copper or bronze materials. Made to applicable ASME standards B16.15, B16.18, B16.22, B16.24, B16.50, B1.20.1. Wrot fittings meet NSF 61G. Recycled Content – Copper Tube & Fittings. Download 2870. File Size 261.74 KB. File Count 1. Create Date December 14, 2018. Last Updated April 13, 2020. Download. Description.Copper Fittings. Product Availability & Highlights: Diameters from 1/8" - 8". Hundreds of different fitting types available. Specification: Meets applicable ANSI/ASME standards: B16.22, B16.29, B16.18, B16.15, B16.26, B16.24 & B16.23. Copper Tube and Coils, Copper Fittings, and Air conditioning products providers in the Kingdom of Saudi Arabia.Wednesbury Tube (Mueller Europe Ltd) are a wholly owned subsidiary of Mueller Industries Inc, Memphis USA and operates from a site in Bilston, Great Britain. Toggle navigation. ... Wednesbury Tube hold many national and international approvals for copper tube, including: UK Kitemark approvals for plumbing tube and medical gas tubes; … Download CAD and BIM files for copper tube products from Mueller Industries, a leading manufacturer of copper tube for various applications. Choose from different categories, such as air conditioning, refrigeration, medical gas, plumbing, and more. Recycled Content – Copper Tube & Fittings. Download 2870. File Size 261.74 KB. File Count 1. Create Date December 14, 2018. Last Updated April 13, 2020. Download. Description.Copper is strong, durable and resists damage. Suitable for all domestic & commercial plumbing installations.Streamline ® Nitrogenized ® ACR Copper Tube is pressurized with nitrogen to provide maximum protection against the formation of harmful oxides normally formed during brazing operations. Reduction of these oxides greatly reduces system contamination. For use in HVACR applications. Made to applicable ASTM standards B280.Cleaned and capped Type L hard copper tube Cleaned and capped hard copper refrigerant line Fire suppression system rated ANSI/NSF 61 Annex G Meets ...A01278 2D/Revit/CAD. Streamline® Copper Solder-Joint Fittings for supply/pressurized systems have been the leading brand of copper fittings for over 80 years. Available in both wrot copper and cast bronze, our product selection has grown to become the most extensive in the industry. We are the acknowledged experts at engineering and ...Mueller Streamline Co. is now able to offer the first refrigeration copper tube and fittings UL u0003Recognized to 700PSI in select sizes. In order to provide the highest level of assurance to u0003our customers that these products continue to meet the higher pressure demands of these modern refrigerants, we have taken the additional step of ... OVERVIEW. Streamline® XHP Copper-Iron Fittings for use in refrigeration applications. Available sizes ranging from 3/8” to 2-5/8” in outside diameter for continuous 130 BAR / 1885 PSI pressure ratings at 120°C / 250°F. First of its kind in the region, copper tube manufacturing facility to produce commercial copper tube for the regional air conditioning and refrigeration market ...Mueller Streamline Co. is now able to offer the first refrigeration copper tube and fittings UL u0003Recognized to 700PSI in select sizes. In order to provide the highest level of assurance to u0003our customers that these products continue to meet the higher pressure demands of these modern refrigerants, we have taken the additional step of ...Manufactured in accordance with applicable standards, our ongoing commitment to quality continues to make Streamline® Copper Tube the preferred and specified brand of industry professionals. For use in plumbing, mechanical, and DWV applications. Made to meet ASTM standards B88 and B306. Meets NSF 61G. Made in the USA. Specifications. Dimensions.Browse Item # D 02050, Dehydrated Coil, 1/8" OD x 50' in the Mueller Industries Inc. catalog including Item #,Item Name,Description,Type,Standards,Weight,Material,Operating Temperature,Operating Pressure,Item Size,HVACR (OD) Size,Length,Style,Qty Pcs. ... Copper Tube for HVACR Applications;The Mueller Group have numerous manufacturing plants throughout the United States and across the globe including in Canada, Mexico, UK and China. The Group have a wide range of products comprising: Copper Tube and Fittings. Brass and Copper Alloy rod, bar and shapes. Aluminium and Brass forgings. Aluminium and copper impact extrusions.Quality, consistency and reliability have made the Streamline ® brand trusted and specified all around the world. For use in above-ground potable water supply systems. Constructed of high-grade copper or bronze materials. Made to applicable ASME standards B16.15, B16.18, B16.22, B16.24, B16.50, B1.20.1. Wrot fittings meet NSF 61G.Quality, consistency and reliability have made the Streamline ® brand trusted and specified all around the world. For use in above-ground potable water supply systems. Constructed of high-grade copper or bronze materials. Made to applicable ASME standards B16.15, B16.18, B16.22, B16.24, B16.50, B1.20.1. Wrot fittings meet NSF 61G.Browse Item # LY04060, Plastic Coated Copper Tube, 1/2" x 60' in the Mueller Industries Inc. catalog including Item #,Item Name,Description,Type,Standards,Weight,Material,Operating Temperature,Operating Pressure,Item Size,Plumbing (Nominal) Size,HVAC ... Our plastic-coated copper tube …ACR COPPER PRESS FITTINGS Streamline® is the best known, most trusted name in the industry—with a nearly 100-year history of providing the best-in-class products you need to work more efficiently and productively. The ACR Press System is the latest example of the industry-leading innovation and commitment to customer needs that make Streamline® …A02708 2D/Revit/CAD. Streamline® Copper Solder-Joint Fittings for supply/pressurized systems have been the leading brand of copper fittings for over 80 years. Available in both wrot copper and cast bronze, our product selection has grown to become the most extensive in the industry. We are the acknowledged experts at engineering and ...Experience top-tier HVACR efficiency with Mueller's Streamline Copper Type L Tube. Marked & color-coded for convenience, available in diverse diameters.Streamline ® Nitrogenized ® ACR Copper Tube is pressurized with nitrogen to provide maximum protection against the formation of harmful oxides normally formed during brazing operations. Reduction of these oxides greatly reduces system contamination. For use in HVACR applications. Made to applicable ASTM standards B280.This MUELLER INDUSTRIES copper refrigeration tubing easily connects air conditioning and refrigeration equipment. Connect using sweating or flare fittings Copper tubing is nitrogen purged to reduce contaminants Item: Copper Tubing Tube Material: Copper Tube Size: 1/4" Outside Dia.: 1/4" Wall Thickness: 0.030" Max. Pressure: 1406 …Mueller Industries, Inc. is an industrial manufacturer that specializes in copper and copper alloy manufacturing while also producing goods made from aluminum, steel, and plastic. It is headquartered in Collierville, Tennessee and comprises a network of operations include tubing, fittings, valves, vessels, and similar items for plumbing and HVACR related …Over the last decade, Wednesbury Tube has undergone a major investment program. We have installed plant and machinery using only the latest technology to make our factory one of the most modern copper tube manufacturing facilities in the world. In addition, in early 2014 Mueller Industries acquired the Yorkshire Copper tube plant. With the ...Mueller Industries, Inc. is an industrial manufacturer that specializes in copper and copper alloy manufacturing while also producing goods made from aluminum, steel, and plastic. It is headquartered in Collierville, Tennessee and comprises a network of operations include tubing, fittings, valves, vessels, and similar items for plumbing and HVACR related … Quality, consistency and reliability have made the Streamline ® brand trusted and specified all around the world. For use in above-ground potable water supply systems. Constructed of high-grade copper or bronze materials. Made to applicable ASME standards B16.15, B16.18, B16.22, B16.24, B16.50, B1.20.1. Wrot fittings meet NSF 61G. Browse Item # DG06050, Plastic Coated Copper Tube, 3/8" OD x 50' in the Mueller Industries Inc. catalog including Item #,Item Name,Description,Type,Standards,Weight,Material,Operating Temperature,Operating Pressure,Item Size,Plumbing (Nominal) Size,H ... Our plastic-coated copper tube …Nov 7, 2019 · About This Product. Ideal for durability and strength, the MUELLER STREAMLINE 1 in. x 2 ft. Copper Type M Pipe is perfect for residential services. Used for thicker wall tube. It can be used behind walls inside a home to route water from a service line and water heater to a fixture. Find out what works well at mueller copper tube from the people who know best. Get the inside scoop on jobs, salaries, top office locations, and CEO insights. Compare pay for popular roles and read about the team’s work-life balance. Uncover why mueller copper tube is the best company for you.Phone Number. Browse All Categories in the Mueller Industries Inc. catalog including Copper Tube,Standard and Mini Split Line Sets,Copper Pressure Fittings,Copper DWV Fittings,PRS …This MUELLER INDUSTRIES copper refrigeration tubing easily connects air conditioning and refrigeration equipment. Connect using sweating or flare fittings Copper tubing is nitrogen purged to reduce contaminants Item: Copper Tubing Tube Material: Copper Tube Size: 3/8" Inside Dia.: 0.250" Outside Dia.: 3/8" Wall Thickness: 0.032" …Phone Number. Browse ACR Copper Press Fittings in the Mueller Industries Inc. catalog including Elbows,Couplings,Reducers,Tees,Flare Adapters,Caps,CYCLEMASTER® Ball Valves - FTG X FTG.Streamline® Copper Solder-Joint Fittings for supply/pressurized systems have been the leading brand of copper fittings for decades. Available in both wrot copper and cast bronze, our product selection has grown to become the most extensive in the industry. We are the acknowledged experts at engineering and manufacturing precision solder-joint ...First of its kind in the region, copper tube manufacturing facility to produce commercial copper tube for the regional air conditioning and refrigeration market ...Streamline sets the standard for quality and cleanliness in the HVACR and plumbing industries. With a full line of both copper and plastic-coated copper tube for plumbing, air-conditioning, …Streamline ACR Copper Press Fittings – Price List (PDF) [featured_image] Download. Download is available until [expire_date] Version. Download 9026. File Size 437.96 KB. File Count 1. Create Date November 8, 2021. Quality, consistency and reliability have made the Streamline ® brand trusted and specified all around the world. For use in above-ground potable water supply systems. Constructed of high-grade copper or bronze materials. Made to applicable ASME standards B16.15, B16.18, B16.22, B16.24, B16.50, B1.20.1. Wrot fittings meet NSF 61G. Recycled copper crafts can be a lot of fun to make. Visit HowStuffWorks to learn all about making recycled copper crafts. Advertisement Making crafts by hand can be extremely rewar...OF TANZANIA United States Minor Outlying Islands UNITED STATES OF AMERICA URUGUAY UZBEKISTAN VANUATU VATICAN CITY VENEZUELA VIETNAM VIRGIN ISLANDS (BRITISH) VIRGIN ISLANDS (U.S.A.) WALLIS & FUTUNA ISLANDS WESTERN SOMOA YEMEN ZAMBIA ZIMBABWE. Phone Number. Browse Copper Iron Fittings in …The exclusive supplier of Mueller Industries copper products in the UAE. We offer all types of copper pipes, tubes & fittings. Our products are used for HVAC refrigeration piping & plumbing in Dubai & all UAE. Leminar ServicePro +971 4 …

Quality, consistency and reliability have made the Streamline ® brand trusted and specified all around the world. For use in above-ground potable water supply systems. Constructed of high-grade copper or bronze materials. Made to applicable ASME standards B16.15, B16.18, B16.22, B16.24, B16.50, B1.20.1. Wrot fittings meet NSF 61G.. Team umizoomi television show

mueller copper tube

ACR COPPER PRESS FITTINGS. Streamline® is the best known, most trusted name in the industry—with a nearly 100-year history of providing the best-in-class products you need to work more efficiently and productively. The ACR Press System is the latest example of the industry-leading innovation and commitment to customer needs that make ... MUELLER INDUSTRIES 50 ft. Soft Coil Copper Tubing, 1/4" OD, 653R Technical Specs ItemCopper Tubing Tube MaterialCopper Tube Size1/4" Outside Dia.1/4" Wall ... The Mueller Streamline 1 in. x 10 ft. Copper Type M Rigid Tube is constructed from durable, long-lasting and corrosion-resistant copper. Great for use as a residential water supply line. This type M pipe features thin walls and is suitable for use behind walls inside homes to route water from service lines and water heaters to fixtures. Product Details. Copper tubing for air conditioning and refrigeration, also called ACR copper tubing, is commonly used for air conditioning, refrigeration, natural gas, LP gas, and compressed air. These tubes are easily connected using sweating or flare fittings. ACR tubing meets Medical Gas Industry standards and can be used with medical gases.With a full line of copper tube products to support most all plumbing supply and DWV applications, Streamline® Copper Tube is available in all common types including, Type K, Type L, Type M and DWV. Each piece of tube is incised marked and color coded for easy, long lasting identity. Manufactured in accordance with applicable standards, our ... OF TANZANIA United States Minor Outlying Islands UNITED STATES OF AMERICA URUGUAY UZBEKISTAN VANUATU VATICAN CITY VENEZUELA VIETNAM VIRGIN ISLANDS (BRITISH) VIRGIN ISLANDS (U.S.A.) WALLIS & FUTUNA ISLANDS WESTERN SOMOA YEMEN ZAMBIA ZIMBABWE. Phone Number. Browse Couplings in the Mueller Industries Inc. catalog including Mueller Streamline ... Each of our great companies plays an important part in the success of Mueller Industries. To learn more about any of our companies, click on their logos below. Howell Metal is an established manufacturer of copper tubing and line sets for residential and commercial construction markets. Copper tubing comes in coils and straight lengths, and ...This MUELLER INDUSTRIES copper refrigeration tubing easily connects air conditioning and refrigeration equipment. Connect using sweating or flare fittings Copper tubing is nitrogen purged to reduce contaminants Item: Copper Tubing Tube Material: Copper Tube Size: 1/4" Outside Dia.: 1/4" Wall Thickness: 0.030" Max. Pressure: 1406 …Customers specify Yorkshire Copper Tube when quality and performance count. They thereby enjoy peace of mind using products that can be trusted to last. ... A Mueller Industries Company. Follow us on Social Media. Site created by Brand Newark. Yorkshire Copper Tube is Registered in England 2045485 - VAT Registration No. GB 687 834 963.Are you looking for ways to grow your YouTube channel? If so, you’ve come to the right place. In this article, we’ll show you how to get 1000 free YouTube subscribers in just a few...Streamline ACR Copper Press Fittings – Price List (PDF) [featured_image] Download. Download is available until [expire_date] Version. Download 9026. File Size 437.96 KB. File Count 1. Create Date November 8, 2021. Each of our great companies plays an important part in the success of Mueller Industries. To learn more about any of our companies, click on their logos below. Howell Metal is an established manufacturer of copper tubing and line sets for residential and commercial construction markets. Copper tubing comes in coils and straight lengths, and ... Mueller Industries’ Streamline ® 125/150 lb. Companion Flange is a two-piece, wrot copper design that provides for quick installation and a professional finish. The copper sleeve allows installers to solder or braze the assembly as they would other wrot copper fittings. The EPDM Insulator provides 100% electrolysis protection above and below ... .

Popular Topics