I do offer pool inspections at an additional cost. I do explain to the clients that it is a visual inspection only. I do not perform pressure tests on the return and supply lines and I don't do a swab test of the liner or shell of the pool. If the client is well aware of the scope and limitations of the pool inspection, then you are fine. Being familiar with pools is obviously better. I have owned and serviced my own pool for the last 16 years.