RUSTLICK Rustlick Sump-Side Defoamer 1 Gallon | Sump Sludge & Sediment Removal with Built-In Pump MSRP: Price: 2099-12-31 $107.36 The Rustlick Sump-Side Defoamer (Model 78640) is a 1-gallon capacity defoaming unit engineered to effectively remove sludge and sediment from machine sumps, helping maintain clean coolant and... Add to Cart Add to Cart