If, in emergency, a quick change-over to tiller steering is required - installation of a by-pass valve is required close to the ram. The Vetus BYPASS10 Valve is supplied with compression fittings and olives for 10mm copper tubing. For systems using Vetus HHOSE6 (6 x 10mm) nylon hose, order the 4 x HS145S sleeve inserts. Chromed brass with painted steel removable handle.