overflow not filling up

[techrider6]

finished setting up my tank filled it up and started pump but the overflows are not filling up
what is the problem need help?
thanks techrider62 :help:

 

[acrylic51]

What type of overflow? Is it a drilled tank with intank overflow or HOB overflow??? Any pics to help out?

 

[techrider6]

it is a 150 aga with built in megaflow i figured it out i turn down the flow coming out
of tank.i guess i need a bigger pump, i am using mag 18 now. will a bigger pump fix the problem?
techrider62

 

[techrider6]

bump

 

[bigb]

not familiar with tank and megaflow . What is gph megaflow rated? If pump isn't returning enough water for them to fill is sump emptying? How is pump on without water movement?
Add more water to entire system.

 

[dogstar]

Mag 18 should be plenty. Do you have the stand pipe snug into the bulkhead. Heard many do not fit tight and may have came loose.

 

[squidd]

Do you have a standpipe "in" the overflow...??
It's an add on part you need to ask for or DIY build seperately...

 

[techrider6]

Yes it is made with 1 14 pvc.Should the part be glue together?
thanks techrider62

 

[dogstar]

If you have the Mag in your sump pumping water into the main tank, then the water has to flow into the overflow box where it can not drain back to the sump untill it fills to the top of your stand pipe. If you are saying its not filling to the top of your stand pipe so it can drain thru the stand pipe back to the sump, Then where is the water going ????? Is any water flowing into the overflow at all ????

 

[techrider6]

The water is flowing into the overflow box. But it will not fill them up unless i turn the
flow down coming out of the boxes in the sump.
techrider62

 

[dogstar]

I saw your edit about glueing the stand pipe. Should not have to do that unless they are really loose enough that the water leaks under them befor it rises to the top. But like I said some ppl. have posted here that theirs were loose and had to modify them with tape or some thing. You have to determine if thats whats happening and deside to replace your kit or glue/ modify. I dont know if you should glue it because that might prevent you from doing future mantanence or repairs in the future. Your call. Plus I would not restrick the drain with a valve at all. Should never have to do that.

 

[acrylic51]

Like Dogstar said wouldn't put valve on output side of overflow box to sump......Sounds to me if water is flowing into overflow box and you have to shut the drain lines down a bit that your pump isn't pushing enough water back fast enough!!!!!!!!
I'd definitely use something bigger than a Mag 18 on a 150......JMO though!!!!!!!

 

[techrider6]

If the overflow boxes are rated at 600 gph how can you feed more to them than they are rated for? a mag 24 would feed around 1700 gph.
techroder62

 

[acrylic51]

Just because the pump is rated at 1700gph doesn't necessarily mean that is what's getting pushed back to the tank......The overflows may handle 600gph each for 1200gph, but with the use of standpipes or durso pipes you can increase it's handling capacity.....
You have to take into account the head pressure being asserted on the pump so in reality you might not be supplying the tank with 1200gph???? How long are your pipe runs, elbows and fittings also play a factor into what the pump is pushing back to the tank as well!!!!!

 

[dogstar]

Originally Posted by techrider6
The water is flowing into the overflow box. But it will not fill them up unless i turn the
flow down coming out of the boxes in the sump.
techrider62
If the water is flowing into the overflow box but the box is not filling to the top of the stand pipe but it is flowing somehow down the drain to the sump then how is it geting in to the drain pipe? Do you have just an open bulk head on the bottom or drain pipe that comes almost to the top of the box ?

 

[techrider6]

I am using pipestands made with 1 1/4 pvc.
techrider62

 

[acrylic51]

Are your stand pipes all the same height????

 

[acrylic51]

Have you tried shutting the tank down and filling the overflow just below the stand pipes to see if you are getting water drainage another place?

 

[techrider6]

there is little to no drainage.

 

[acrylic51]

If the water level is below the standpipes there shouldn't be any drainage at all....I still think it's the return pump.....