ATO issue.... maybe

[cale262]

I have a tall res for one of my tanks, much higher than the level in my sump so I ran the top off line to the DT overflow which is higher than both.

[paddyob]

Originally Posted by outacontrol

It is called gravity and the pump is starting a siphon. The reservoir needs to be lower than the output, or use a check valve, or use a different plumbing method.
I thought that you were putting your reservoir in the basement?

Yes it will be in the basement. But I do not have time to take that project on right now.

It's not back siphoning so I don't see a check valve being of any use.



I cant see everybody having their res lower than the sump. I Would bet
Most people have them at the same level, or are using a tall standing res.

[lee9]

Yes, I also run my top off line directly into my display tank which is higher than my resevoir because I have no sump on my RSM 250. If your pump is adjustable reducing the flow may be worth a try.

[sphelps]

Why not just pump into the overflow box instead of the sump?

[paddyob]

Originally Posted by sphelps

Why not just pump into the overflow box instead of the sump?

I guess I'll try that. Just worry about the delay to drain, make it's way to the sensors and still over fill.

Thanks people.

[Nate]

Pump output must be above the highest level the water can be in the resevoir. So water may have to fall 2 feet into sump.

What I usually do on these installs is plumb in a much larger line, like 1 inch pvc from the bottom of the stand to just above my water level in the sump. And then just run my pump line into the top of the PVC (close to the stand) and let it run through there down into the sump so you don't have water free falling 2 feet. Due to the line being bigger, that helps with your syphon stop.

Nate

[paddyob]

Originally Posted by Nate

Pump output must be above the highest level the water can be in the resevoir. So water may have to fall 2 feet into sump.

What I usually do on these installs is plumb in a much larger line, like 1 inch pvc from the bottom of the stand to just above my water level in the sump. And then just run my pump line into the top of the PVC (close to the stand) and let it run through there down into the sump so you don't have water free falling 2 feet. Due to the line being bigger, that helps with your syphon stop.

Nate

I just discovered this on another site. Was considering it. Might go this route.

[paddyob]

I have some of the grey PVC lying around. Is this able to be used in this application? I think I will try the larger PVC and just let the pump hose drain to this.

I used white (potable) for my tank... just not sure if the grey has some property that is undesirable.

[Mandosh]

It'll either be Sc80 or electirical conduit; both will be fine.

[paddyob]

Originally Posted by Mandosh

It'll either be Sc80 or electirical conduit; both will be fine.

I believe it was the electrical stuff.

So nothing to worry about in regards to contamination of my water?