Why does water level keep rising and falling?

[ervine]

Hi guys,

I think I have encountered this problem before but it somehow went away or I managed to fix it... just can't remember how..

So here's the deal.. the water in my last compartment of the sump is rising and falling resulting in my auto-top up turning off and on every 20 secs or so...

I have not changed anything in the plumbing other than turn on the chiller pump after I got my replacement. Did not change the pump, so everything is the same as before...

I know it's a possible sign that the overflow pipe cannot take the flow but the thing is I didn't change the plumbing nor the flow rates of the pumps...

So what gives?

Thanks!

Ervine

[ervine]

Ahhh... nevermind I managed to figure it out...

for some reason the hole at the top of my durso standpipe became constricted (probably by dust?) resulting in the inconsistent flow down the pipe...