I'm putting together my water mixing station, and it seems I have a little problem. The outlets at the bottom of the barrels are lower and the inlet of the pump, and I failed to compensate for that by angling the 90° elbows upwards slightly. Everything else important is already glued in, and now I've got this height difference. Can I use a block to prop up the horizontal line of plumbing so everything lines up? I mean, I could force it together as is, but it would put stress on the connections to the pump. I've already tried loosening the unions and trying to adjust, but it's all glued solidly. Thoughts?