Designed for both residential and commercial settings, our needle valve system is ideal for side water tanks. It helps prevent leaks and delivers a reliable, hassle-free sanitary experience. Easy to install for DIY enthusiasts and professional plumbers alike. These side inlet valves provide faster, cleaner water supply and are well suited for upgrading toilet systems. Constructed from plastic with a brass head, the components are resistant to corrosion and aging for long-lasting performance. Experience stable water discharge with bubble-free operation and a quiet, low-noise environment. The 4-way valve with copper tube inlets is a practical choice for bathroom renovation projects. Use scenarios - Home bathroom upgrades or toilet replacement to improve reliability and reduce leaks. - Renovating commercial restrooms that require durable, leak-resistant side inlet connections. - New bathroom installations or retrofits needing a reliable 4-way valve with copper tube inlets for clean, efficient water supply.