New home and pool, and left over gaskets / parts when de-winterizing?

[Cpeed]

Hi, I am new to the forum and plan to be an active user. Appreciate the help in advance.

I purchased the home last year (first pool), and had a company come and winterize it (I am in Utah, so cold winters). They disconnected quite a few things (plugs in heater and line to filter, pump, etc) and when I go to put the pieces back together, there are several parts that I can't find a home for. The companies are insanely busy right now, and are weeks out. I'd like to get it started up on my own if I can. It looks like the pump was disconnected from the filter, and then the basket was disconnected from the main lines (apologize if my terminology is off). I dont see any other pipes disconnected. They did plug the filter basket off the pool (assuming so that they could drain water out of the piping). A few pictures of what I have.

The first shows the leftover pieces I have, the second and third show the pump assembly going to/from the filter/heater and pool. Any Ideas what they could go to? Or any thoughts/suggestions on what I should do as I reconnect the equipment?

 

[danpik]

The first one looks like a washer that may have come from an old expandable winterizing plug. The second one may be the gasket that goes in the union that is disconnected. The third one I am not sure. The fourth one is a leftover jamb nut for a Romex clamp. The last one is some sort of thread in cap to close off a pipe

 

[Richard320]

The first one looks like a washer that may have come from an old expandable winterizing plug. The second one may be the gasket that goes in the union that is disconnected. The third one I am not sure. The fourth one is a leftover jamb nut for a Romex clamp. The last one is some sort of thread in cap to close off a pipe

The third looks like an insulated bushing that fits inside electrical conduit ends.

 

[danpik]

^^^^^^I was on my phone when I posted that. Back on a computer and can see it better now. Yes, bushing

 

[Cpeed]

Thanks so much for the quick help! After looking up what you guys had suggested, I think you are right. I didn't realize what went into winterizing the pool, and after doing some reading it makes sense. I'm sure i'll be back, haha..