Here we have plastic hose connectors. They consist of a centre section and two screw on caps. The screw on caps have an internal taper which clamps down on a split tapered spacer. An O-ring is fitted over the pipe with a 5 or 6 mm backup ring/spacer. The ends of the hose spigot into the centre section then when the caps are screwed on the tapered pieces force the spacer against the O-ring to seal and then further tightening forces the split tapered spacer onto the hose to give a good grip to prevent the pipes pulling out. The inner diameter of the tapered spacer is grooved to bite into the hose. Everything is plastic and so you can bury it for 1000 years. I can take photos if anyone is interested enough.