The copper pipe where the water runs immediately after the drain hole for a kitchen sink faucet is cracked and needs to be replaced. How do you get this tube to come off?Is there a washer thats needs to be unscrewed for the copper drainage pipe to come off? Can anything else besides channel lock pliers be used to take this off? Can this simply be replaced by buying another copper drainage pipe at the hardware store?
Here's what you really need to do to fix the pipe. Turn off your water supply to the house and open the faucet to drain off the water pressure. Using a pipe cutter or hack saw, you'll have to cut your existing pipe near where the leak is. Note that many have advised using a torch to melt the solder in a close joint, but with the water in the line (because you won't be able to get the water out of all the pipe), it will take forever to heat the pipe up enough to melt the solder and the water that comes out if and when you do get it melted will be dangerously hot). Go to the hardware store and get a new coupling and see if you have enough room (straight pipe) to install this where your leak is. If you do, measure how much pipe you need to remove on the piece with the leak and cut it off. If you can't fit the coupling, you may need to remove the bad section of pipe and install a new piece of pipe. If you have to do this, you should be able to apply heat to a joint and pull out the old piece of pipe. then, use the pieces you removed to cut your new piece. Prepare your existing pipe and coupling, or new pipe and existing joints for sweating, and apply a good coat of flux.
It threads into the sink strainer it is brass it it will be hard if not impossible to get out in one piece. Trust me it unscrews right under the sink strainer. if you have a rubber strap wrench it might help some or a small pipe wrench. If you can't budge it cut it out and remove it from the p trap. you will also have to replace the sink strainer as well. It really isn't that hard. I hope this helps.
Undo the whole assembly under the sink or at least the broken part and take it to your local hardware store. You may not get copper but you will have a trap and all that other stuff you need. I think channel locks will be sufficient to loosen. PVC is the cheap way to go out and you will figure it out once you get started. Oh! Its screws on the bottom of the sink. Plumbers putty for 99 cents is a good gasket for reassembly.
If you are talking about the 1-1/2'' tube directly under your basket strainer[which is the part that sits in the bottom of the sink bowl] you may be talking about what is called a ''brass tailpiece''. You call it copper, but is it a gold , brassy colour? If it is then it just threads onto the bottom of the basket strainer I mentioned earlier and can be removed with channellock pliers. If it is actually copper, then it may be hooked up solid. Which means that it was threaded onto the basket strainer, and then the joints were soldered making it impossible to remove without actually cutting the copper. One other possibility is that it's a brass tailpiece that was threaded on and then slipped inside the copper pipe and soldered, as the 1-1/2 brass tailpiece has an outside diameter that fits inside the 1-1/2 copper pipes inside diameter. If this is the case it would have to be cut or ''sweated'' out using an acetylene torch, heating the joint until the solder melts and the tube can be twisted out while the solder is a liquid again. I'm sorry for being long winded, but there are several possibilities as to what you actually have there. I hope I've been of some help anyway. Finally, if this is a brass tailpiece as I would suspect it is, then replacements are readily available at any hardware, good luck!
