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Questions about sump and plumbing


RookieRock

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RookieRock

I made a mistake, sorry. The 1'' pipe has a flow rate of 1799 l/h. The turnover depends on the return pump and the powerheads obviously. My previous calculation was to find out the flow rate of 1 and 2 sizes up from the return pipe; and how low the opening of the pipe should be, below the water surface. Now I understand why the overflow boxes are tall. 

 

Anyway, about the turnover, I redesigned the plumbing and the total length of the return pipe is 90 cm or 3ft. I'm going to use two 45° elbows. So that's another foot. I guess I should add 1 foot for the 90° elbow before the nozzle. That's 5ft (or 1.5m) of head pressure in total.

 

The DCA 2000 has a flow rate of about 400l/h at 5ft. That's... meh.

On the other hand, an Aqua Medic DC Runner 2.3 has a flow rate of about 700-800l/h at 5ft. That's a decent turnover of about 10x. Sounds good?

 

Leistungsdiagramm_DC-Runner-x.3_1600px.png.78d5da5b45859757a973519a76f12e96.png

 

So, the return pipe will have the same diameter with the output of the return pump. It's 20mm for the DC Runner. That's 1/2'' for the return pipe then.

The drain pipes will be 1'', just to make sure that it can handle a higher flow. I'm going to use one pump for now though. The DT is only 70l. Don't want to turn it into a washing machine.

 

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Reefkid88

 With 45's you do not have to add anything,just 90's. Unless you want to be safe and add 6" but its not needed. 

 

  You would be safe with ¾" drain and ¾" or 1" return,I had once found a chart that showed how much pressure each sized PVC can handle,both pressurized and gravity. Let me see if I can dig it up and I will post it. 

 

 Basically if you use 45's,it will create less head pressure therefore not requiring you to have to get a bigger pump to combat the pressure it takes to push the water thru a 90 vs pushing thru a 45. 

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RookieRock

The return pipe is going through a hole in the cabinet, so I'd have to use two 90° elbows. Instead, I can use two 45° and have the same results.

 

IMG_5535.thumb.jpg.4b6407891c62f2c7693958eff109e070.jpg

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Reefkid88

Correct,and less restrictive flow. Thus eliminating some head pressure. 

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