Seal holes for ground source heat pump

[Tobext]

The house was built in '67 and has had geothermal heating since the '80s. Pipes/hoses are at a depth of 0.9 meters, which means the entrance/exit is underground in the basement. No water enters during rain, but when the snow melts, the ground becomes saturated, and a little water finds its way in where the pipes enter and exit through the foundation. I know they don't build like this today, but unfortunately, they did back then. No signs of moisture in the basement or the foundation/wall. During the spring's patio construction, I plan to dig down and seal around the pipes, so I'm wondering if anyone has tips on suitable sealing. Note: I want to seal from the outside to make it properly tight.

 

[Testarn]

If you're planning on digging down, it might be a good idea to place Isodrän/Pordrän against the wall above, below, and beside the hole to prevent water from seeping into the wall. Install with a plastic edge as usual so that water from the surface is directed away from the wall and place a geotextile between the soil and the drainage board. If you then fill the holes around the pipes with foam sealant, I see no risk of water intrusion. We have it like this, and I've never seen water on the inside of our basement wall at the incoming pipes from the geothermal heating.

 

[Tobext]

If you are going to dig down anyway, it might be good to lay Isodrän/Pordrän against the wall above, below, and beside the hole to prevent water from seeping in towards the wall. Install with a plastic edge as usual so that water from the ground surface is directed away from the wall, and have landscaping fabric between the soil and the drainage board.
If you then fill the holes around the pipes with foam sealant, I see no risk of water intrusion.
We have it like this and I've never seen water on the inside of our basement wall where the pipes from the ground-source heating come in.

Thanks for your input! We will look into this further.