I am in the process of building a cabin and I have just turned the water supply on and I can't get water the bathroom sink. I think something got in the line during construction. The bathroom sink is at the end of the water lines that run to various locations in the house. I have removed the wire braded hose that comes from the shutoff valve to the sink as well as the shutoff valve and I have no water coming from the supply line in the wall. I hooked a garden hose to the supply line to try and back flush it but I couldn't get water through that way. I hate to tear out the new walls to get into the connections inside the wall and unstop it. Is there any way to unstop it short of having to redo the wall. The shower beside the sink has plenty of water pressure so I know I have water within 5 feet of the sink.

Sounds like a line never got hooked up. I've seen it happen. Not by me I hasten to add.

I assume you are working on the cold supply. Do you have hot water to the faucet? If you have neither maybe the two lines got hooked to each other instead of to the correct supply trunks.

If you hooked a garden hose backwards and didn't get any flow at least you don't have an open end inside a wall. Of course that would tell you where the problem is very quickly. Run that hose back into the cold line and open the hot at the sink. If you get flow you have a dead loop.

EPM