Watts 1R-1Y-1B Kwik-Change WQC4RO11 Annual Replacement Filter Kit for 11 50 GPD System - Not for Premier By IPW Industries

We had some problem with one of the cartridges having a leak in it. It was not the sellers fault. They had great communication and replaced our defective filter properly.

Was hard to find these Watts filters, Amazon was a supplier of my models filters! Work just fine!

Can't tell difference from previously