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u/4ThaLolz

Image 1 — Anyone know what this grey pvc pipe with a string sticking out of it is? It's built into the concrete slab in our backyard.
Image 2 — Anyone know what this grey pvc pipe with a string sticking out of it is? It's built into the concrete slab in our backyard.
Image 3 — Anyone know what this grey pvc pipe with a string sticking out of it is? It's built into the concrete slab in our backyard.
Image 4 — Anyone know what this grey pvc pipe with a string sticking out of it is? It's built into the concrete slab in our backyard.
Image 5 — Anyone know what this grey pvc pipe with a string sticking out of it is? It's built into the concrete slab in our backyard.
Image 6 — Anyone know what this grey pvc pipe with a string sticking out of it is? It's built into the concrete slab in our backyard.
Image 7 — Anyone know what this grey pvc pipe with a string sticking out of it is? It's built into the concrete slab in our backyard.
Image 8 — Anyone know what this grey pvc pipe with a string sticking out of it is? It's built into the concrete slab in our backyard.
▲ 1 r/landscape

Anyone know what this grey pvc pipe with a string sticking out of it is? It's built into the concrete slab in our backyard.

We moved into this house in 2020 and this pipe has had us stumpped ever since. Its about 4ft (121cm) from the edge of the slab. The string is made of nylon and we can pull it out about 6in (15cm) untill we can't pull it anymore. The irrigation system is pretty extensive in the yard, so maybe its part of that? But water has never come out of it. We also think it could be some kind of abandoned attempt at installing electricity to this part of the yard? We also haven't smelled any gas, and have tested it with a carbon dioxide detector. Let me know if there are any other details needed. The pictures have measurements.

u/4ThaLolz — 1 day ago