I have seen this question a couple of different times and have yet to come across an answer that relates to my problem. Someone who answers on this site a lot is probably about to laugh with a sigh "asked a thousand times". If so, here we go again. Sink pressure is very low. I cleaned out the faucet aerator with water and there was a bit of sand in it. When I turned the water back on it was a little better but not the solution. So I turned the stop valves off and opened the lines. Not much came out... it just trickled out. When I turned stop valves back on to check to see if pressure had improved it had, in fact, gotten worse. Now it is coming out a little more than a trickle. It is a one stem valve and my assumption is that my next move is to detach the faucet, diassemble it, and check the o-rings. Is that correct? Is there anything else I can try before crawling under the sink and going to HD ten times to find the right repacement valve or o-ring?

Additional info: The bathroom shower that is also on the same line has always had low pressure. It is brand new bathroom, meaning we just constructed it from an old kitchen pantry a year ago, so I know that the lines are new (copper) however they run from the original galvnized steel (house built in 1900). We ran the lines from the kitchen inlet galvanized steel pipes. The sink right next to that shower has great pressure and comes from the same line, the shower line is second in the line. We changed the valve on this handle set twice already, found sand and dirt in the valve, and it improved but is still had low pressure compared to the bathroom sink. No need to answer this question because it is not really a problem yet but thought it may be useful information for the kitchen sink. Also concerned that I might have a larger problem with the old galvanized pipes but on the other hand thinking that it is just the valves because of the inconsistencies in the various sinks. Bathroom sink great pressure, dishwasher great pressure, kitchen sink and bathroom shower low pressure... all on the same line.

So when you closed the stops I assume you also mean you disconnected the supply lines from the stop to the sink and that is where you "...it just trickled out" Next step is to close you main and disconnect the lines going to the stops. Then hold a towel or bucket over the lines and have someone in ear shot reopen the main. You obviously have a restriction somewhere and we just need to keep going up stream until we find it.

my next move is to detach the faucet, diassemble it, and check the o-rings. Ihave the same concerns as Bob. Your next move should have been to open up the angle stop while you had the valve open to see if you have pressure in the supply. Follow Bobs directions and get back to us with the results, Good luck, Tom

Thanks Bob and Tom, but I am not sure that I follow. If I do, then it is going to be a wet one. What you are saying, is that I should do is disconnect the supply line from the stop vavle under the sik, place a bucket over (and under) the stop valve and then open the stop valve? That sounds pretty frign messy, but I will do it if you say so ("jump off this bridge")

Bob.. to answer your question above, no I did not detach the supply line. At this point I do not know what I expected to happen but I thought that I would be able to see some dirt or gunk come out (I realize now that this makes no sense). I left the supply line on, turn off the stop valve, and opened the faucet. Nothing really came out, not even the water that was left in the supply. Also Bob, I would appreciate it if you could explain further what you mean when you say "close your main and disconnect the lines going to the stops" The only shut offs in the house are under the sink, next to the bathroom toilets and the main shut off valve. Are you referring to another stop vavle after the main but before the sink shut off valve. If so, I am not sure one exists. There could be another one in the craw space under the house one but we live on the second floor of a two story Triplex and I am not sure if I understand what turning off the line at the main and then thirty feet from the main would accomplish. Wouldn't that be redundant? Please explain.

Thanks for the help guys.

Bob's asking you to go out tyo the house shut off and shut the entire house down whild you unscrew and remove the aqnmgle stop that's clogged. Now he wants you to hold a towel around on hold a bucket under the open line and then turn the water back on to flush out the line. You should have a full stream when doing this. If not click on back and tell us.

If I do, then it is going to be a wet one.
Hey! Nobody said this would be easy, (or dry). These valkves and supplies must be cleared and the only way to do it is with water pressure. Good luck, Tom