We salvaged some pavers from a demolition site, to make a small area for a picnic table, and have some mason sand left over from an addition that we built over the past couple of years. I know that this is not the right sand for this application, but rather than leaving it in a covered pile indefinitely, or burying it, are there any reasons that it won't work under the pavers? No vehicle traffic in this area of the yard. Thank you.
I would say that the sand you ahve is okay provided it is not so fine it resembles mud when wet.
The good conscientious technician or serviceperson will carry extra oils and lubricants in case the new pump did not come with oil or the oil was accidentally spilled, so the service call can be completed without an extra visit.