Plumbing leak help

There are any number of ways to get from your point A (the female thread in the pump) to point B (the female thread in the filter). If both are 1.5", one was is to go all 1.5" between the two points, eliminating the need to convert to 2" at either end.

You can find a union with a 1.5" thread on one side, and 1.5" slip on the other side, and run 1.5" pipe to the same sized union on the filter end.

Or glue a 1.5" slip-slip union onto the existing grey pipe coming out of the pump, and run 1.5" pipe from there to the filter.

Or convert the 1.5" slip of the union to 2" and then run that to the filter, covering back to 1.5" if need be on that end.

Etc. Lots of other possibilities as well.

In the pic you provided it looks to be all 1.5" originally, so you wouldn't lose anything by leaving it all 1.5".

Pardon if I'm not understanding the dilemma exactly, but it seems simple enough...

If you're determined to screw a 1.5"-thread-to-2"-slip union into the pump, that's fine, too. As I mentioned, call inyo and see if they have the part you want.

Wanted to post this here as an outside option for this type of repair. They sell an inside PVC cutter for not too much money.
PVC Pipe Fitting Saver
This allows you to cut the pipe right before the fitting, and then drill away the glued in section, thus allowing you to reuse the fitting already in place.

whatever you get, make sure it is SCH 40 PVC

Wester97 said:

3 examples here.
Too small
Too small
Too big

Click to expand...

Those appear to be Jandy fittings. You have Hayward equipment. They are not compatible.