- Compatibility: Designed for Karcher steam cleaners including SC1.010, SC1.020, SC1.030, SC1.035B, SC1125, SC1202, SC2.000, SC3.000, SI2125 and many more. Replacement part number 4.590-105.0 with safety valve and black O-ring 6.363-279.0. - Upgraded safety features: Includes a reliable safety valve and durable black O-ring to create a secure seal and prevent leaks during operation. Helps maintain optimal pressure for safe and effective cleaning. - Premium construction: Made of high quality materials that withstand high temperatures and pressure for exceptional durability and consistent performance under regular steam cleaning tasks. - Easy installation: No special tools required. Attaches quickly and easily to your Karcher steam cleaner, letting you return to cleaning without hassle or technical knowledge. - Practical use scenarios: - Routine home cleaning: use during regular steam cleaning of floors and surfaces to maintain safety and efficiency. - Bathroom and kitchen upkeep: helps tackle grout lines, tiles, and stubborn buildup with reliable pressure retention. - Upholstery and car interiors: supports safe, leak-free operation when refreshing fabrics, curtains, and vehicle interiors.