The Hydro/Vac Adapter (M-407) adapts the P-400 Hollow Bit to any SDS Plus drill. For dry concrete using the Vac Swivel Head (P405), Vac Cleaning Connection (P-400), and the Vac Tubing (P-788), enables the user to extract the drilling dust and any contaminants from the crack opening a clear path for the injection resin.
If the concrete is damp, use the Hydro Swivel Assy (A-933). Water is introduced through supple nylon tubing connected to a Delrin swivel. The water flushes the debris from the socket as it is generated. The hydro system is very thorough, keeping hairline fissures free of impacted debris.