Water Guard #W40510-F Water Guard Spin on Replacement Filter Keeps harmful water in fuel from reaching the burner. May be used with the W11BVR & W11BVRK filter kits, but requires adapter #WGB15.
These warnings are not an indication that these products are violating any safety standards or regulations.
However, as our products might be sold in the state of California, we are legally obliged to inform customers about the potential presence of these chemicals in our products.