Return Pump help For a 600 gallon

[Backfromthedead]

The Jebao 20000 says 5283 gph, I understand that due to plumbing/ head that you may only get half of that, just curious what size tank you have that on? I guess what I am really wondering is are you concerned that the pump could go to 100% flow from whatever you have it set at? possibly from a power outage or something like that. Then have the ability to overflow the tank due to the plumbing not being able to handle the flow?

I think a pump failure like that is unlikely to happen, but flooding can happen--more often the result of one or more of the drains clogging. Its for this reason that every sump setup should include a matching size emergency drain for every drain you are using. These drains are usually set just above the waterline to prevent flooding.

 

[Oskie Boy]

The rule of thumb is cut the to cut the rating of the pump in half. The reason being is that return pumps are rated at zero head height, and 100%duty cycle. Once you factor in diameter of the plumbing head height and 90* plus the fact that you won't be running the pump at 100% the actual gph is about half the advertised rating. For you returns the larger the diameter of the plumbing the less lops you will have. So a 3500 gph rated return pump should actually put put just shy of 2000 gph. I would suggest using 1-1/2" return plumbing for each return pump to get the most out of your return pumps. The return pump shouldn't be hard plumbed to your pvc. A 1' piece of flexible pond hose should be used to connect the return pump to your hard plumbing.

There are many different types of DCP models. They are all similar in price for the most part. What about the DCP 15000?
3962 GPH times two pumps 7924 GPH divide in half for head. = 3962 /600 so 6.6 turnover. I also want to be able to run the pump at 50%-60% (possibly keep the noise down) since I am using flex pvc for the return there is going to be very few 90's may be two on each run one to enter the bulkhead on the top of the tank and another on the other side of the bulkhead to create flow into the tank, I may use lock line for this not sure yet.

On your second point each return pump will go to two overflows that have 1" bulkheads.
so I am thinking: pump>1' of 1.5" hose> 1.5"X two 1" manifold Wye> 1" flex PVC all the way to bulkhead on top of tank.

I would use something like this from flex PVC.com


any thoughts?

 

[Oughtsix]

The Jebao 20000 says 5283 gph, I understand that due to plumbing/ head that you may only get half of that, just curious what size tank you have that on? I guess what I am really wondering is are you concerned that the pump could go to 100% flow from whatever you have it set at? possibly from a power outage or something like that. Then have the ability to overflow the tank due to the plumbing not being able to handle the flow?

Yes, I worry about accidentally setting the flow to 100% and causing a flood. I have been running my DCP5000 on my 35g tank at 80% for the past 5 years and have never accidentally bumped it up. But increasing the pump power is a matter of simply repetitively pushing the ^ button on the pump controller. A single push will only up the power in 2% increments. Holding the button down will NOT continue to ramp the power up. You have to press and release the button for EVERY 2% increase in output.

The overflow box I am going to use on my 180g tank with the DCP20000 pump is rated at 3400 gph. My numbers tell me that once all is said and done and the water is flowing through the pipes the DCP20000 will not be able to overwhelm my 3400 gph overflow.



BUT!

I am not much of a gambler and don't like living on the edge. My overflow box will be mounted ~3/4" down from the rim of the tank. The 3400 gph rating is the amount of water it should pass through the weir slots in the box. An overflow of the box would entail the tank water going over the top of the box and swamping the box before the top of the tank is reached.

My primary drain pipe will be 1.5". My emergency drain pipe will be 2". When the box is swamped the 2" emergency drain pipe should be able to easily handle the extra water.

If I am COMPLETLY off base on my calculations and 100% output could cause an overflow I will put a restriction in my 1.5" return to tank plumbing to physically limit the output of the pump to a level that will not cause an overflow even if the pump is turned up to 100% output via the pump control pad.

 

[TheWolfman]

I'm running those exact return pumps. They run quietly and move a ton of water with only a slight hum. I'm not quite following what your planing, are your going to split the return into two outputs per pump? If so that should work fine. I would just make sure your setting them up to have a proper syphon brake if your planing to run the bulkhead through the back of the tank. I prefer to plum them over the top of the tank for that reason.

 

[Oskie Boy]

I'm running those exact return pumps. They run quietly and move a ton of water with only a slight hum. I'm not quite following what your planing, are your going to split the return into two outputs per pump? If so that should work fine. I would just make sure your setting them up to have a proper syphon brake if your planing to run the bulkhead through the back of the tank. I prefer to plum them over the top of the tank for that reason.

Yes two outlets per pump, still trying to figure out exactly which size pump to get, possibly two DCP-15000. Also, they will be plumbed into the top of the tank.

What type/ brand of hose do you use for your 1' section to make the jump from the pump to hard plumbing? I was going to use a 1' silicone hose which are suppose to cut down on noise but I can only find it in 1" size. I need 1.5" size for that.

-Nic

 

[TheWolfman]

I'm using pond hose. You can get it by the foot from your local pond supply and LFS. Lowes sells it in rolls as well.

 

[TheWolfman]

Here is a picture of the way I have the hose connected to my plumbing Oskie Boy a union is inline for easy maintenance.

 

[Oughtsix]

I am also a big fan of Pond Hose/Tubing. It is quite flexible, does not kink and has a pretty smooth interior. I use it quite a bit!