Some lenders used to allow a "hold back" oe 1.5 times the estimated cost of the new system.
However, I have seen a change to requiring the system be in the gtound and operating at closing.
A cash deal will be worked out between the buying and selling parties, with the direction of their attorneys.
If a system fails, there are usually 24 months to "fix' it or replace it before there are health department problems.
I would contact a local legal professional to help with this answer and to save time and money.
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A Title V inspection is valid for two years. It is valid for three years before the sale if you have records proving that your system was pumped annually since the inspection.
If weather prevents an inspection at sale or transfer, the inspection must occur as soon as weather permits, but no later than six months after the sale or transfer.
While the law does not specifically mandate that the seller is responsible for repairing a failed system, as a practical matter a buyer's financing will usually not be approved unless a Title V certificate is obtained prior to closing.