I thought a recently installed Moen kitchen faucet had a clogged aerator because the flow seemed too weak. The aerator wasn't clogged. The apparently large spout of the faucet has a brass insert inside it that reduces the diameter of the opening to about 3/8 ths of an inch. Are there new water-saving regulations that apply to kitchen faucets ? ( the kind of kitchen faucets that don't have the sprayer at the end of the faucet.)