These quick Connecting fittings use push in technology for easy installation and removal and require none tool Suitable for reverse water filtrations systems 3 / 8inch outlet hose These quick Connecting fittings are strong and can be firmly Connecting with other fittings with high stability : Before installation, cut the pipe flushes and insert Single way check Valves Good sealing, not easy to leak, easy and quick to plugs and unplug, and will not damage pipes or fittings, Manufacturer: Nucelit