2Pcs IP68 Waterproof Electrical Junction Box Outdoor Underground Wire Connector Junction Boxes for 2 or 3 Pin Cables Range for 0.23-0.33 Inch(5.8-8.3MM)

Nice and strong

Not as easy to use, but for the price it works as expected

This waterproof electric cord splice saved me $150 when I accidentally cut my garden pond's air pump cord in two. Its simple to install, works on 3 conductor stranded wire cords and is rated for underwater use. It doesn't come with instructions which is why I deducted 1 star, otherwise this is a 5 star connector. Thankfully, we found a U-Tube video on how to use it!

Fountain is up and running again. Works great.

Glad I found this device. It was truly a snap to connect the wires--took all of 30 secs. The waterproof casing let me install it in my water tank when my pump wiring needed replacing. Saved me a lot of time and trouble.

I took my time installing this splice and made sure the gaskets where in the correct places, not linked or twisted. I tightened down the lock nuts and ends as hard as I could (but not to the point of cracking) and tested the connection prior to submerging in my backyard pond. It failed in 2 weeks. I pulled it up and carefully opened the unit to find it fully flooded.

For my yard fountain, took several attempts to succeed. Round 1) GFCI tripped within about 20 minutes. Believe that was because too much of the outer insulation was stripped, so the compression gasket could not compress enough to make a good seal.Round 2) after shortening the stripping of the main insulation to about one inch, re-tried and ran for about 8 hours before tripping. Note, it's one inch plus whatever amount you strip to the copper. See photos.Round 3) Dried out the connector then reconnected, and this time tightened the connector with pliers and a wrench (before was hand-tightened). I could see much more compression of that internal red gasket. As another precaution, I've tied the connector so that it is close to the surface level of the water. So far has run for 4 days without tripping.Fingers crossed, I'll report back if Round 3 fails. Other important notes: This is not an easy plug-in-out connector. Rather, disconnection requires screwing some tiny Phillip head screws. Further, working with stranded cable also adds to the challenge, as each individual connector must be inserted into a tiny hole (6 times). Also, for round 3 added plenty of slack in the cord to the fountain, to make it easier to access those tiny screws. Finally, the two connectors included the red compression gaskets only, which are the smaller ones. I see other similar items that offer an even smaller gasket than the red.... I might opt for one of those if round 3 eventually fails.

Although the product looks as if it will be watertight and do the job of an underwater electrical connector, I was a bit nervous and so consequently decided to fill each end with a silicon adhesive after doing the joining of the 2 ends of the electrical wire.I am now a happy customer