Should I use 1" or 1.5" for 260g?

[aldiaz33]

Thanks for reply in great details. My pump is a quietone 4000 HF internal pump. In the future i plan to use an internal pump since its more quiet. I am leaning toward going small since big drain pipe require a heavy duty pump which will surely run up the cost of pump and electricity. This will surely make the Misses hate the hobby due to costs.

Is there a way I can go 1.5" drain pipe and use a energy efficient internal pump without costing me a limb?


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here is a pic of the tank. I might have use the wrong terminology. It's one overflow on each side.

Maybe I'm misunderstanding, but drain pipe size has no bearing on the electrical consumption of your pump.

A 1" drain can handle about 600GPH
A 1.5" drain can handle about 1,350GPH

If you want to run a larger pump that will push more GPH, it will use more electricity.

I have a similar tank; 265 with two corner overflows. Each overflow has a 1" drain. I'm running 2 1350gph pumps full blast through 3/4 pipe with no issues. Lots of water movement. sump is 40gal.

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What pump are you running and how high is the water being pumped? I doubt you are actually getting 2,700 total GPH.

A 1" drain is capable of handling about 600GPH, so I'm thinking you are not really pushing 1350GPH through each 1" drain.

 

[Stramn]

to be honest, 1.5" plumbing is not expensive, come on the most expensive piece is the ball valve at 11.99$ at homedepot.

 

[jlnguyen74]

My pump is a quietone 4000 HF internal pump.

Just use 1in bulkhead, one per overflow box. They should handle that pump flow w/o a problem!

 

[Mayo]

my 400 gallon i run 40mm x2 overflows (1.5" for u americans) and return is 25mm or 1" i run a 10,000Lp/h (2641gallons) hour pump and its fine general rule of thumb have 1.5x bigger overflows x2

 

[jdhuegel1]

What pump are you running and how high is the water being pumped? I doubt you are actually getting 2,700 total GPH.

A 1" drain is capable of handling about 600GPH, so I'm thinking you are not really pushing 1350GPH through each 1" drain.

I'm running twin Deep Blue Triton 5's. water is being pumped about 6' from each pump up the return and these are rated good to 13'. You're right; probably not at 2700 but there's a lot of water moving. Was just making a reference.

Question: how would one go about bench testing a pump to measure flow? These are rated (usually high) at 1350 but I'd hope the true loss wasn't 50% from rating. If a 1" drain does 600 then max I'm doing is 1200. That means, these are waaaaaaaaay overrated.




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[wildman6809]

I think there is more to it than just the one inch will do 600 gal. More variables come into play

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[jdhuegel1]

I think there is more to it than just the one inch will do 600 gal. More variables come into play

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Yes, but I'm pretty sure if you were to use 600gph as a baseline for a 1" drain, factor in variables (aside from the water being frozen) to either extreme, it's still fair to think my pumps are way overrated at 1350 since I'm not overwhelming them. I wouldn't think the 3/4" return killed that much flow.

Anyway, thx for the input. Sorry to derail the thread!


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[FishNCash]

I just ordered my Laguna 2400gph electronic pump. I went to check the piping size that came with the sump and realized it was only 3/4". Is that too small for this pump? I have decided it's either 3/4" or 1.5" for dual overflows. I really don't want to drill the top of my sump unless I have to. The acrylic is thin so I am afraid to crack it. Here are some pics of the sump, flex pipe, and overflow.

btw, is electronic pump supposed to operate more efficient? I saw some that were not listed as electronic and some that were.

sump 28x15x15

flex pipe

one of the corner overflow

 

[FishNCash]

Bump


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[aldiaz33]

A Laguna Max Flo 2400 that does 1,664GPH @ 6' head. I think that two 3/4" drains will be overwhelmed by that pump, but there's only one way to know for sure...set it up and let her rip.

Out of curiosity, was the Quiet One 4000 pump previously running on that sump? A Quiet One 4000 will do ~528GPH @6' head, so with the Laguna you will be increasing flow by a factor of over 3.

If you have model PT348 then it draws 100 watts.
If you have model PT8248 then it draws 84 watts.

Both are pretty efficient.