DIY pvc Overflow

[dhoffroad]

oh what the hell time to go get a bag full of fittings LOL

[shinbo]

Originally Posted by Doug1

Care to elaborate? I think I know what you mean, but your phrasing is a bit confusing. A properly designed overflow is self limiting, it can only drain as much as is pumped into the tank. Are you saying that you have reduced the water return rate to aid in noise reduction?

No, I reduced the amount of water that flows out of the tank into the sump to reduce the noise. Otherwise when the water level drops to a certain point, the intakes will create the flushing toilet effect (can’t find a better way to describe this). In other words, this overflow outputs more than what the return pump can input, that’s why I reduced the flow with valves at the end.

[shinbo]

Originally Posted by dhoffroad

hey I was checkin this out on a diff board I thought it was a cool idea how long have you been running or testing it ?

It has been in my tank for a month. Since it has been working great I thought it was time to post this .

[Doug1]

Originally Posted by shinbo

No, I reduced the amount of water that flows out of the tank into the sump to reduce the noise. Otherwise when the water level drops to a certain point, the intakes will create the flushing toilet effect (can’t find a better way to describe this). In other words, this overflow outputs more than what the return pump can input, that’s why I reduced the flow with valves at the end.

This is also a problem with "standard" overflows, thats why the Stockman/Durso mods are so popular, because it eliminates most of the noise associated with water being sucked down the drains

[Kevin1000]

Originally Posted by Doug1

This is also a problem with "standard" overflows, thats why the Stockman/Durso mods are so popular, because it eliminates most of the noise associated with water being sucked down the drains

I wonder whether you could adapt the same principle to this design?

[shinbo]

Could someone post a link or description on how they work?

[SPC]

http://www.dursostandpipes.com/

Steve

[thebrowns78]

i tried it last night with 1/2 inch pvc and only one inlet tube and one outlet tube.
and i got about 50 gph on. im going to try to putting diffrent sets of inlets on it today ( 2,3,4 ) to see what kind of gph i can get

[dhoffroad]

hey you said that the "twisted upward tube" is not needed? in the link that you gave in the first post to the computer generated drawing there is just a little stub coming out of the "cross" fitting is that just to help "prime" the system, and then when running, it needs to be capped off ?? or dose it need to remain open for air ?? TIA

[Geoff]

Originally Posted by dhoffroad

hey you said that the "twisted upward tube" is not needed? in the link that you gave in the first post to the computer generated drawing there is just a little stub coming out of the "cross" fitting is that just to help "prime" the system, and then when running, it needs to be capped off ?? or dose it need to remain open for air ?? TIA

i think it helps it do drain better. it keeps air from getting trapped in they system causing glub noises.

G~

[dhoffroad]

well I have spent a few hours trying to make mine work I can't get it to keep siphon.. when the pump shuts off the overflow sucks air ...any sugestions??

[Geoff]

can you post a pic of yours?

do you have that tube pointing upwards that is open to the air? this will act like a siphon break. without it it will just siphon water until the inlets get exposed to the air.

G~

[dhoffroad]

no I did'nt put that tube on, it seems like when the water level gets close to the inlets it starts sucking air in the inlets ( you can hear the suckin sound ). as for a pic right now it is kinda in two pieces and out in the garage ( started to get a little fustrated so I had to stop for the night) but if you think it will help I will get some in the morning.

[Geoff]

Originally Posted by dhoffroad

( started to get a little fustrated so I had to stop for the night)

been there before.

i think pics would help a lot. there are a lot of tubes that need to be longer than others. if they are not then there will not be enough water volume to work properly.

G~

[dhoffroad]

this is what I started out with and then I shortened this lengthend that tried all kinds of diff stuff ....