Does bulkhead size matter?

[Bloodasp]

It would just make it easier to match the amount of water draining from your tank and the return that way. You want them to be close to equal as possible. If you have a small drain compared to the amount of water returning to your tank your tank will eventually overflow and cause a flood. On the other hand if you have a larger drain compared to your return it would just stop as soon as it goes below your overflow line and resume once it starts filling up again, but then the noise issue comes into play here but that is easier to deal with than causing a flood on your floor. I don't know if that made sense but hopefully it did.

[tHeHEYzeus]

Yah that makes a lot of sense thank you, what is the deal with the noise? Do smaller pipes make more noise?

[Bloodasp]

not really. kind of similar to your sink, bathtub or toilet, when water drains you sometimes hear a gurgling noise, which is sometimes pretty loud. same thing happens when water drains from your main tank to your sump.

[mark]

large bulkhead for you drain since just gravity whereas the return is under pressure so can use the smaller.

A open drain will cause noise. Since you only have the single drain, look into the Durso, Stockman or Hofer to help quiet.

[tHeHEYzeus]

Thanks Mark that was very helpful!