Assuming 3/4 inch PVC. I would use two 3/4 inch couplings and a two foot piece +/- stick of 3/4 inch PVC and glue it all together. Dig back about four feet to expose existing PVC pipe. You may want to glue the first joint and half of the second joint and let it set for a day. Then make the final glue joint by lifting and slightly bending the existing exposed pipe to shorten it slightly so you can fit it in the coupling. The more exposed pipe the easier it will be.

Yes it is 3/4 inch PVC. I'm not sure what you mean by "and half of the second joint." It will be tedious to dig back four feet (on each side?) because it's next to a fence, but we could do it.

Thanks so much for your advice!

Each coupling has an in and an out. So each coupling has two glue joints. If you are experienced you could glue all at one time. However you don't want to apply pressure to one joint while it is still drying. It is going to take a little force to gently bend the PVC and you don't want to apply force to a drying joint.

You can install the first coupling (two glue joints) easily. You can also install the second coupling but only on the end of the two foot stick of pipe easily. Now comes the challenge and this is why I recommended letting the first glue joints dry first because you need to use a little force. You only need to expose about four feet of pipe in one direction. Stand over the exposed pipe and lift it with one hand. With the other hand force the end of the pipe down creating a slight bow in the pipe. This effectively shortens the pipe a little so you can slip it into the coupling. It won't line up exactly but close enough to give it a shove so it slips into the coupling.

Alternately if you want to do less digging. You will need four 90 degree slip (glue) fittings, two six inch +/- sticks of 3/4 inch pipe and one 2 ft stick of 3/4 inch pipe. Then splice a U into the gap. It is a little less pretty but works just as well and easier to install. It is underground so it doesn't really matter what it looks like. When using 90 degree fittings pay attention to the sequence you join them to minimize misalignment.,

Thanks for that idea. I did see it done online.

Have a wonderful weekend and thanks for your help with this.

Ginny