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Your code might require metal conduit for an outdoor, above ground installation. Mine didn't & one electrician quoted the install using the PVC the whole length for about the same price. I figured I'd be better off with the metal - less chance of tearing it up with the weed whacker or some other dumb thing.
There are two grades of electrical PVC- schedule 40 and 90 (or is it 80- it's been a while).
Patty, we are having an electrician run the wiring from the tub into the house and hook everything up. He is also installing a breaker in the tub. We will be digging the trenches and burying the wire once he is done. We need about 85 feet of wire. His cost is about $575.Hope this gives you an estimate.