Overflow to sump plumbing

[bph]

Okay, still working on my AGA 125 tank. Has two 1.75 inch and two 1.5 inch holes pre-drilled overflows in the back. I have two 1.5 inch bulkheads for the feed to the sump and two 1 inch bulkheads for the returns.

 

Question one: can I tee the two overflows together and have one pipe emptying into the sump? Should I use 1.5" pvc pipe the whole length or smaller/larger? I have a lot of room to work with.

 

Question two: The tank's bottom is at 28 inches off the ground, but so is the wall of the sump (its behind the wall in another room). How does this work? I will be having the water come out the bottom of the tank, across about a foot or so horizontal length then go up to get into the sump.... that an issue? The top of the tank is at 51 inches above the floor(overflow is about 48 inches high), so gravity fed, there is a decent delta in height, but I am not a mechanical engineer and don't claim to know fluid dynamics or anything

 

That is about all I can think of for now... hope the description makes sense. I appreciate any help

 

Thanks in advance,

Brian

[Big Country]

With the bottom of the tank and the top of the sump at same height you are going to actually go uphill on the outflow, with the riser height it shouldn't slow it down a whole lot. I would not plumb the outflows together, that will only slow it down more.

[dschflier]

Pictures would be very helpful. It sounds like you are saying that the water will come down pvc piping and then have to go up to get over the lip of the sump. If this is correct I would say it is a bad idea. It should work, but I think it would slow your drain rate down a lot. I have a tank thread for my setup and from my experience going from smaller diameter PVC to larger works much better. My 2 back tanks are plumbed so that they each have 2x1" drains. The first tank goes from 1" pipe to 1.25 pipe and then when it gets to the second tank it goes to 2" pipe. I also always include air venting if I have the room. This allows for much quiter and efficient draining.

 

http://www.wamas.org/forums/index.php?showtopic=23855 This is the link I have for my thread. It has pictures of the drainage. Hope it helps.

 

David

[dbartco]

Question one:

Sure, providing you are are not going nuts with a huge return pump.

 

 

 

Question two:

I do this with my fowlr. I have to go through 2 walls to get back to the sump, underneath a frag tank for another system, them up over the edge into the sump.

[dschflier]

dbartco: Going over the ledge like this doesn't slow the flow rate at all? I can certainly see this working but I would think it would slow stuff down a bit.

[YBeNormal]

Not if you use a large enough pipe and the rise is not too high. BTW, I have two drains going into one pipe to the fuge. The second pipe enters through a Y fitting so it merges with the water from the first drain. Works great.

[bph]

So, here is a pic of my soon to be sump in the back room (blue plastic line is from my RO system sitting above):

 

Here is a pic stand and where the pvc will be going through the wall:

 

So, drill some holes in the sump or go for the slight incline and go over the lip? I guess I could just go for the slight incline and if it fails to perform adequately, I can always drill the holes later...

Edited August 13, 2008 by bph

[m3fan8ic]

I just finished plumbing for my sump where I Tee two darains and two returns due to the space/location. My sump is in basement and I only had two holes through the floor to work with. Checkout the link below w/pics..

 

 

http://www.wamas.org/forums/index.php?showtopic=24113