Hi Lynn,
Thank you for sharing your experience. The Venturi faucet #LF-042-VNBB is equipped with screens in the inlet adaptors #970-1159 to prevent debris from flowing into your faucet. The maintenance guide has cleaning instructions to clear any loose debris that may have gotten caught up in the screens that could be restricting the flow. Below is a link to these steps; please refer to the 3rd page, then step “Adaptor Cleaning.” If cleaning the adaptor screens does not help, it could also be the cartridge that would need to be replaced. Please call us at 1-800-732-8238 if you have any questions or need a new cartridge, and we will be happy to help.
https://pfisterstorage.blob.core.windows.net/documents/47362-0900%20web.pdf
Thank you,
Pfister