durso problem

[EMUreef]

Here is my issue.

The water drains into my over flow where i have my durso.
Durso takes in the water, than lowers the level of the overflow so much that it doesn't have anymore water to take in untill it fills up again. Gurgles than does this over and over.

at first it almost seemed like the return wasn't able to keep up with the durso/drain.

so to compensate i turned the ball vavle on the drain a little to restrict the drain and now i have a constant level but things could get caught and clog that and create a flood.

Discussing with sir pat and chort maybe the hole at the top of the durso is to small what is everyones input?

here are pictures to kinda help what im describing

picture one is normal water level, how it should be


picture two is where the water level drops too and gurgles than the water fills back up to picture 1 line.



not my pics.

[Sir Patrick]

Almost like its flushing, and filling up again to flush all over again, right?

[Sir Patrick]

Is the end of your drain pipe under water in the sump, or is the end above the top water level of the sump below?

[Sir Patrick]

You using hard pvc, or flexible tubing for the drain?

[EMUreef]

Almost like its flushing, and filling up again to flush all over again, right?

correct. this is whats happening

[EMUreef]

Is the end of your drain pipe under water in the sump, or is the end above the top water level of the sump below?

under water.

[EMUreef]

You using hard pvc, or flexible tubing for the drain?

spa flex. that slopes a little into the sump

[Sir Patrick]

Raise that end of spa flex out of the water. See what happens.

[EMUreef]

Raise that end of spa flex out of the water. See what happens.

alright ill give that a try tomorrow and see what happens. if not im going to make the hole bigger.

[Sir Patrick]

Not an exhaust hole problem- but close-

Copied and pasted from the durso standpipe site-

The flushing is caused by back pressure in the standpipe preventing air in the pipe from escaping the drain. Instead of escaping the drain, the air tries to rise in the drain slowing the GPH exiting the drain. The water level in the chamber rises. The increase in the chamber water level adds pressure to help clear the air from the pipe. Once enough water pressure builds up in the drain, the air and built up water flush at a fast rate, kinda like a toilet flush. This causes a rapid drop in the overflow chamber water level, below the end of the durso stand pipe, to start all over again.

The flx tube end should be above water level, or if possible, less than 2" below the water surface, for noise. Somtimes it will need to be above water level to stop this issue.