Review on 💧 JQK Faucet Aerator Insert, 4.75 GPM Bathroom Replacement Parts 10 Pack - FAG-P10 by Brent Saake

Since nobody seemed to bother to test them, I did. I fully opened both sink faucets and filled a gallon jug in 15 seconds at 90psi. 15 x 4 = 60 seconds or one minute. So YES THE FLOW IS AT LEAST 4 GPM. Now I don't have a scientific flow tester, just a cheap kitchen faucet, so the claimed flow rate is probably accurate. The fit is very precise. So if you have limescale deposits, you may need to clean the tip before attaching it. I pour it into every faucet in the house. I love her.