all pvc overflow flow rates?

[coffeetwitch]

Thank you for that! I don't get how you maintain a siphon on a power out.


And did you say your flow rate was through this?

 

[Rscomia]

As long as the water never drains below the inlet to the overflow your siphon will not break so as soon as the power comes back on it will begin again Ive never tested my actual flow rate but im gonna guess it to be 700-800 gallons per hour Ive got a pretty large return pump but I also send part of my water back through the fuge with it to

 

[Rscomia]

Ive seen alot of people using a pump that will pump the air out of them but once I start my siphon it has always restarted itself

 

[mrbee2828]

Linear... got it. I just didn't know what the technical term was I guess I have read a lot about toothless overflows as well since making mine. I think I am going to off the teeth on mine and redo the top 1/2 of my dual intake like you said with the "T" connection higher to siphon less in the power outage.

 

[Rscomia]

You also need to make sure you put a anti siphon hole in your return to

 

[mrbee2828]

My hole spray bar is a 1/8" from the surface so the whole thing is basically a siphon hole

 

[Rscomia]

Some pictures of mine hard to get good ones since my tank is up against the wall

 

[Rscomia]

My hole spray bar is a 1/8" from the surface so the whole thing is basically a siphon hole

That works to I didnt do a spray bar mine just returns under the water surface

 

[mrbee2828]

BTW, I took the end off the spraybar and put an elbow on it and the flow was way higher (from our discussion on the other thread). I'm wondering if I make the spray holes larger and put the cap back on if I can keep such a god flow. They aren't really "spraying" anymore... just a little flow until it blows out the end.

 

[Rscomia]

BTW, I took the end off the spraybar and put an elbow on it and the flow was way higher (from our discussion on the other thread). I'm wondering if I make the spray holes larger and put the cap back on if I can keep such a god flow. They aren't really "spraying" anymore... just a little flow until it blows out the end.

Probably if you get enough holes in it to equal the same size as the pvc it should be close to that

 

[mrbee2828]

I was thinking about doubling the size of them and then adding some that shoot directly down or at a 45° angle into the middle of the tank.

 

[Rscomia]

Make the holes closet to where the water flow is coming from smaller then as you get farther away make them gradually bigger and you will get a more even spray

 

[mrbee2828]

Make the holes closet to where the water flow is coming from smaller then as you get farther away make them gradually bigger and you will get a more even spray

ooohhhh fancy lol. I'll give it a try. Sorry for jacking the thread.... back to rates.

 

[coffeetwitch]

Good info is good info.

 

[coffeetwitch]

BTW, I took the end off the spraybar and put an elbow on it and the flow was way higher (from our discussion on the other thread). I'm wondering if I make the spray holes larger and put the cap back on if I can keep such a god flow. They aren't really "spraying" anymore... just a little flow until it blows out the end.

That makes since now I was thinking the spray bar for your wet/dry. Hahaha I was think about the wrong end of the tank!

 

[coffeetwitch]

Some pictures of mine hard to get good ones since my tank is up against the wall

I guess my confusion is when I had this set up



As soon as I stopped water the siphon would continue and drain the whole thing.

 

[coffeetwitch]

I guess my confusion is when I had this set up

<img src="http://www.aquariumadvice.com/forums/attachment.php?attachmentid=54210"/>

As soon as I stopped water the siphon would continue and drain the whole thing.

When I was testing in the sink I had a pipe in that 90

 

[Rscomia]

I guess my confusion is when I had this set up

View attachment 54210

As soon as I stopped water the siphon would continue and drain the whole thing.

It will if there is nothing on the other end to stop the flow as soon as my sump fills during a power outage it stops the water from flowing completly through which keeps it from draing the whole thing

 

[coffeetwitch]

How did you figure out how to do that?

 

[David S]

Probably if you get enough holes in it to equal the same size as the pvc it should be close to that

It doesn't equate that way,just like 2 x 1" pipes dont have the same flow as a 2" pipe.