When our single stem kitchen faucet is opened less than fully, a vibrating noise develops where the water service enters the house (about 35' from the faucet). This occurs if the faucet is turned to full cold, full hot or anywhere in between. The pipe comes through the block basement wall and is mortared in place. It turns 90 degrees up and turns 90 degrees again to run along the bottom of the floor joists above. The distance from where it enters the house and the first nylon pipe hanger (on the bottom of the closest joist) is about 4'. This does not seem to occur when other faucets are turned on. The faucet is about 2 years old. Any ideas on why this vibration occurs? Thanks in advance!!!