ok so just filled the Tank and them the Drain is noisy down at the Sump area making bubbles noises everywhere, So mu original plans was to run all 45S no 90s but the union made it that if i used a 45 it would hit the sump so i used the 90. I believe its the 90 causing the noise. So im debating removing the union from the top by the bulkhead and just putting a screw on 45 down to another 45 with a gate valve in between. or should i just add a gate valve to the straight pipe after the 90 ??