Does the buyer or seller pay for the repairs?

In practice the seller. Because they can’t sell to anyone without fixing it. But it’s negotiable.

But the buyer gets the benefit of the repair. I'd probably push for at least a 50:50 split (or, have the line inspected before listing the house for sale, and if it needs repair add that to the asking price).

	▲	gnopgnip 3 days ago \| parent [-]
		The seller gets the benefit if they can’t sell it to anyone else