Best position for external pump on the W/D

  • We are currently upgrading MFK. thanks! -neo
Ok. The return line will split into 2 lines that each line will be run up into the overflows. The I'll have 2 flexible output spouts coming out of each overflow (4 total spouts).

Should I drill hole in each just below the water line?

Also what does this hole exactly give me and how does it work?

Thanks
 
Your output is going back to your overflow?

By output we mean the water that exits your pump and goes back to the tank.
Also what does this hole exactly give me and how does it work?
Click to expand...

When your pump shuts off for any reason your output to the tank will act as a siphon and drain water backwards through your pump. It will siphon until there is no more water to siphon.

If your output is 6" below your water line then 6" of your tank will siphon backwards through the pump and into the sump. If your sump isn't big enough to handle 6" of tank water then your sump will over flow.

To prevent this you drill a small hole in your output line "in" the tank just below your waterline. I put mine about 1/2" below the water line.

Now when your pump shuts off for whatever reason the line to the tank will start siphoning, but when the water level in the tank drops to the hole your drilled, in my case 1/2" down, air will enter through that hole and into the output line breaking the siphon.
 
I'll type it out simply, because it's easier for me to explain this way. The return water from the W/D is being pumped up to the tank where it will be split into 2 separate lines that run into each of the overflows? (i have 2 overflows) then in each of the overflows the return lines will split into 2 flexible nozzles that will poke out into the tank. That's the plan, does it seems correct. So would the holes be drilled into the nozzles that sit in the tank below the water line. Or should I put the hole in the return line that runs up inside the overflow.

Thanks for the help
 
How far below the water will the nozzles be placed?

If they are near the surface you probably won't need to drill any holes. If they are more than an inch or two then you could put the holes just below the waterline on either place you mentioned. Just as long as the line can suck air when the water level drops.
 
They will probably sit about 2 - 3in below.

Also. would you have an idea on what size drain and return lines I should run to and from the tank.
 
At 14' of head that pump will push 1500 GPH. Throw in some elbows and that will drop some more.

2" from the overflow to the sump will be plenty and 1" from the pump back to the tank will also be plenty. That pump has a 1.5" outlet so maybe johnptc can come along and comment about the best return line size from the output of the pump. I'm not sure what effect reducing from 1.5" to a smaller size would do to the head rating.
 
You say a 2" to go from the overflow to the sump. Should I run each overflow separate to the sump or join the drains after coming out of the overflow then run one line to the sump?
 
I'd join them and save some money on piping. I'm draining somewhere around 2000 gph through a single 2" line.

If you ran them seperate then you could get away with 1 1/2" for each line.
 
Thanks for the help. Also, the return line. Yoursay 1" for the return. Should that be 1" right from the pump to the tank. Then split it to 2- 1" lines that run to the overflows?
 
You must log in or register to reply here.
MonsterFishKeepers.com
Top Bottom