I installed a Moen single (hot/cold) faucett after noticing a dripping faucett from our old 2 knob faucet (Moen also). When I went to turn on the water there was no cold water and low hot water pressure. Had to replace a nipple below just above the cold water supply because it was rusted and leaking a little bit. However, that was done after the initial install so the no cold water pressure showed up after installing. Is that a problemwith single sprayers or should matter? Caviat... There was no water pressure issues prior to removing thew old faucett.

In the process of removing and replacing the faucets you disturbed the pipes and caused particles to break loose from the inside of your old pipes and to stop somewhere in your line or faucet. My first thought that it is in the spray diverter in the faucet. You can check this by turning off the water and taking the faucet apart and taking the cartfidge out, now using a plastic cup (use plastic instead of glass because the pressure could knock it out of your hand) hold the cup upside down over the faucet where the cartridge came out of. Have some one turn the water on very slowly and not very much, let it hit the cup and wash back into the sink, do this for thirty seconds or so and the put thing back together and see if you have water.

You mentioned a single sprayer so I am going to assume that you have a faucet that a spray pulls out of the spout, If this is the case you will have an anti syphon valve in the line where the spray hose connects to the faucet under the sink. You can disconnect this spray hose at that point and clean every thing out, you might even put a bucket under the sink to caatch the water and turn the faucet on for a couple of seconds. Put everything back and see it it works.

Let me know what you find.

Im a bit mystified how you put this. I take out the cartridge.. then run water through a pulled apart faucett? If I read you correctly.

The yes its is a single (ie one knob to handle hot and cold, just turned 2 diff ways... but the stretch sprayerdoes not come out of the spout. Its on the same assembly but sits to the left of the spout on the base.

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Originally Posted by letmetellu

In the process of removing and replacing the faucets you disturbed the pipes and caused particles to break loose from the inside of your old pipes and to stop somewhere in your line or faucet. My first thought that it is in the spray diverter in the faucet. You can check this by turning off the water and taking the faucet apart and taking the cartfidge out, now using a plastic cup (use plastic instead of glass because the pressure could knock it out of your hand) hold the cup upside down over the faucet where the cartridge came out of. Have some one turn the water on very slowly and not very much, let it hit the cup and wash back into the sink, do this for thirty seconds or so and the put thing back together and see if you have water.

You mentioned a single sprayer so I am going to assume that you have a faucet that a spray pulls out of the spout, If this is the case you will have an anti syphon valve in the line where the spray hose connects to the faucet under the sink. You can disconnect this spray hose at that point and clean every thing out, you might even put a bucket under the sink to caatch the water and turn the faucet on for a couple of seconds. Put everything back and see it it works.

Let me know what you find.

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What I meant is after you have turned the water off to the faucet, either at cutoffs under the sink or at the main cutoff, take off the handle and take the cartridge our of the faucet. Then you run a small of water through the faucet by turning the water back one where ever you turned it off. Doing this should wash any trash out of the faucet that may have collected in the faucet.

What I meant is after you have turned the water off to the faucet, either at cutoffs under the sink or at the main cutoff, take off the handle and take the cartridge our of the faucet. Then you run a small of water through the faucet by turning the water back one where ever you turned it off. Doing this should wash any trash out of the faucet that may have collected in the faucet.

Great analyzing by let metellu. That's exactly what happened. You disturbed minerals built up in the pipe walls and now they're in your faucet. Letmetellu gave you great instructions for flushing out the supplies and valve body. What he should have added was to check the inlet ports on the bottom of the cartridge for trash and debris in the inlet ports before you replace it. Good luck, Tom

So you have no cold water and very little hot water. Try cleaning the aerator at the end of the fuaucet spout. This will most likely not cure all of your problems, but it will most likely give you hot water pressure back to normal. I agree with above statements about cleaning cartridge and flushing vavle body. Only reason I mention the aerator is because if you flush the valve body and clean the cartridge, when you put it all back together, and the aerator is plugged, it can be quite perplexing as to why you still don't have good water flow from the fuacet. Hope this all makes sense, and please let us know how you make out. Lee.