Hey Midnight, I was just thinking of something that may put your mind at ease. Your pipe will flow 1200-1400gph under the power of gravity (the range is because I have to guess at the pipe size). You stated that you are flowing 1000gph. If that is the rating of the pump, keep in mind that it will actually only be 700-900gph due to the height of the tank.
The discrepency between the actuall flow and what the pipe wants to flow is why it is gurgling. The real solution is still to tune the pipe to your flow. However, I came up with an alternate solution (but isn't perfect).
It involves changing the plumbing from one large waterfall to a series of smaller ones. Take a drinking glass into the bathroom and pour a full glass from shoulder height and note the sound level. Then pour a glass from one foot and then again as low as possible. Use these results as a comparison to the noise level that you are currently dealing with. If you feel that smaller cascades will solve the problem, get more 90 elbows and zig zag your way down the pipe. There will still be some gurgling but the first and last cascades will muffle the inside noise.
And the idea of using P-traps is some good thinking. However, to function, they must be vented; Otherwise they are gurgle machines. The vent will be an express lane to the waterfall sounds. In homes, they are vented outside through the roof.
The discrepency between the actuall flow and what the pipe wants to flow is why it is gurgling. The real solution is still to tune the pipe to your flow. However, I came up with an alternate solution (but isn't perfect).
It involves changing the plumbing from one large waterfall to a series of smaller ones. Take a drinking glass into the bathroom and pour a full glass from shoulder height and note the sound level. Then pour a glass from one foot and then again as low as possible. Use these results as a comparison to the noise level that you are currently dealing with. If you feel that smaller cascades will solve the problem, get more 90 elbows and zig zag your way down the pipe. There will still be some gurgling but the first and last cascades will muffle the inside noise.
And the idea of using P-traps is some good thinking. However, to function, they must be vented; Otherwise they are gurgle machines. The vent will be an express lane to the waterfall sounds. In homes, they are vented outside through the roof.
but ya good idea
