Plenty of connectors are rated for submersible use or resistance to high-pressure streams of water. An IP69 rating suggests best-in-class waterproofing. We tend to recommend two different connector series. One is Aptiv’s Metri-Pack or Weather-Pack series. The other is TE Connectivity’s DEUTSCH connector series. Both perform well, but we prefer the Deutsch connector series because the sealing portion of the connector is a part of the connector itself, requiring no additional assembly. The sealing element of Aptiv’s connectors need to be applied to the terminal before assembling the cable, which adds a step to the production process.