Review on Kohler 1131481 Hot Ultraglide Valve Assembly: Efficient and Durable Metallic Concealed Valve Solution by Douglas Irwin

I bought this to replace the valve assembly on an 18 year old Kohler Alterna faucet. I agree with other reviewers that trying to remove and replace the cartridge (actually the leaking part) is nearly impossible on an older build - don't even bother. The original design was sturdier and wider at the bottom, but the replacement still matched the original pickguard at the top. In general, it looks like it's well done. The supply hose is shorter. So if you don't have the flex line from the input power supply you will need to replace that as well. The flexible hose from the valve to the outlet tee is also slightly longer than the original. I did not notice any difference in the noise level of the device. Installation instructions are ok. I don't know if it will last as long as the original valve assembly, but Kohler still make good products for what they stand for.