I'm replacing a broken flow-switch on a hot tub, and since I've never used PVC cement before, I want to make sure I don't screw this up. The flow-switch has a fitting (hope that's the right word) on either end that slides over 1.5" PVC pipe. It's all standard schedule 40 PVC.
Now I have everything I need, and I've watched some how-to videos on youtube, and it all looks straight forward, except for one thing. The fitting on the end flow switch is ever-so-slightly tapered - it gets slightly narrower as it goes in. I'm pretty sure it's designed this way so that you get a nice snug fit. However, doing a dry run, as I push the pipe into the fitting, it will not go all the way down to the hard-stop. I'm not sure it needs to - looking at the broken piece, there is a small gap there (BTW, the flow switch was cracked from having water frozen inside - nothing to do the PVC joins). In the videos I've watched, you just push the pieces together, rotate 1/4 turn and hold in place until set. However, I'm unsure how far to push in. In the dry run, if I push in as far as I can, the pieces are so tight that I can't turn them at all. Once there's PVC cement on the pipes, I'm sure it will be even harder to push these things together.
The hard stop is maybe 1.25" in. With force, I could push the pipe in a little over 1", but it was a bear to get out again. Without forcing it, it goes in maybe about 1/2 to 3/4 inch, which doesn't seem far enough.
Any advice?
Thanks.
-J