Rely on seller's septic inspection?

[Susan Herschell]

Hello BP community,

I am in the due diligence process of purchasing a 7 unit residential property in Carson, WA. The property runs on a septic system and the seller is required to provide a recent inspection and maintenance report prior to closing. Is this report sufficient or am I better off shelling out the extra $1,000 (and disrupting the existing tenants for a few days and potentially agitating the seller) to have an inspection of my own performed? As long as the seller's inspection is recent and from a reputable source, could  a second inspection just be considered a waste of time?