![Brass BSP Female Thread + Copper Welding Pipe Fitting Straight Union Nut Socket Connector for Air Conditioning Refrigeration-1I4-12mm - Amazon.com Brass BSP Female Thread + Copper Welding Pipe Fitting Straight Union Nut Socket Connector for Air Conditioning Refrigeration-1I4-12mm - Amazon.com](https://m.media-amazon.com/images/I/51XQpRHwhVL.jpg)
Brass BSP Female Thread + Copper Welding Pipe Fitting Straight Union Nut Socket Connector for Air Conditioning Refrigeration-1I4-12mm - Amazon.com
![EZ-FLUID Plumbing 1/2" C X MIP LF Brass Copper Pipe Union C x Male Iron Threaded (Copper Sweat Sockets X MIP) Connection Copper Fitting,Straight (5 Pack) - Amazon.com EZ-FLUID Plumbing 1/2" C X MIP LF Brass Copper Pipe Union C x Male Iron Threaded (Copper Sweat Sockets X MIP) Connection Copper Fitting,Straight (5 Pack) - Amazon.com](https://m.media-amazon.com/images/I/61CyZXazC3L.jpg)
EZ-FLUID Plumbing 1/2" C X MIP LF Brass Copper Pipe Union C x Male Iron Threaded (Copper Sweat Sockets X MIP) Connection Copper Fitting,Straight (5 Pack) - Amazon.com
![Everytime I connect one of these female copper fittings to a threaded male piece, it leaks. It's not the solder but seems to be the threads? I've used Teflon paste, and not, Everytime I connect one of these female copper fittings to a threaded male piece, it leaks. It's not the solder but seems to be the threads? I've used Teflon paste, and not,](https://i.redd.it/xm1jdmwd2l981.jpg)
Everytime I connect one of these female copper fittings to a threaded male piece, it leaks. It's not the solder but seems to be the threads? I've used Teflon paste, and not,
![Threaded Copper Pipe Price of Refrigeration Copper Tube and Insulated Copper Tube Is Cheaper - China Copper Insulation Pipe, Insulation Tube | Made-in-China.com Threaded Copper Pipe Price of Refrigeration Copper Tube and Insulated Copper Tube Is Cheaper - China Copper Insulation Pipe, Insulation Tube | Made-in-China.com](https://image.made-in-china.com/202f0j00vpFYnNJgfEbz/Threaded-Copper-Pipe-Price-of-Refrigeration-Copper-Tube-and-Insulated-Copper-Tube-Is-Cheaper.webp)