Pro Faucet Filter Replacement

As soon as I changed my filter, my sink began to leak since June. I’ve been working with filter baby to resolve this and on two video calls. They sent the wrong adapter. All I asked for was replacement small thin, black O-ring that clearly split that was never sent horrible process. Poor customer service and then they won’t let me return. Also, every time I want to change my other filters, I own three of these they were completely clean my water must not be bad enough to need this.

Not sure it makes a difference since the filter is always clean inside. I compare with the new one and it looks the same

Black stuff is growing in the filter baby and I don’t wanna buy another