Pump choice

[Somerandomtechyboi]

Used aquarium pump deal went bust so now ive looked at options that are 8-10$

 

The budget is 10$ but lowest possible is preffered, also dont wanna guzzle too much power cause then rip power bill + the rad also has to deal with cooling the damn pump too

 

Now ive found some generic aquarium pumps that im particularly interested in but mainly h max is what i think i should be looking for, i used a d5 pump as reference and all the pumps i chose blew it away with flow rate cause aquarium pump but h max is what really matters

 

 

D5 pump as a reference seems to have 1500l/h flow rate with ~3.8 h max and power consumption of ~23w

 

Now for the pumps that i have chosen

 

105b pump

48w power consumption with 4000l/h flow rate and 3.2m h max, its ~9$ + shipping

 

106 pump

 

This brand is going for dirt cheap and specs line up with other brands 106 pump, 4000 l/h flowrate with 4m h max at 70w power consumption, ~1$ more than the 105b pump

 

107 pump

Same goes for this one, 5000 l/h flowrate with 5m h max at 95w power consumption

 

 

Realised that most of these pumps were just generic models with slightly diff but mostly same specs between brands so searched for the cheapest ones and this is what i got

 

 

Now im leaning towards the 106 for futureproofing reasons as the next upgrade for this loop will add this massive car evap rad i can get for 8$ w shipping

So the only issue remaining would be how the hell am i gonna move it around cause 7kg is not light xD

 

 

Now would the 107 be worth it over the 106? Or would it be better to go for the 105b instead?

 

If a d5 can run a car rad then id assume matching its spec would help futureproof the pump

[ddennis002]

1 hour ago, Somerandomtechyboi said:

Used aquarium pump deal went bust so now ive looked at options that are 8-10$

What are you planning to submerge the pump in?? What kind of container?

[Somerandomtechyboi]

3 hours ago, ddennis002 said:

What are you planning to submerge the pump in?? What kind of container?

Literally just a reused tupperware like these

7 cm high and thats my crummy 2$ aquarium pump for scale

 

This is the rad i wanna use

Its an evap rad i got for 2$, 23.5 x 21 for size and i can fit 4 120mm fans so guess its effectively a 480mm rad, thiccness is 4cm, its in pretty horrible condition at the front but ill just put the fans on the rear since its in pretty good shape

 

And my block is literally just a reused 92mm tower, specific model is alseye eddy 90b plus, kinda regret getting a 92mm when i could have gotten a decent used 120mm tower that doesnt suck ass

 

ill be using those generic chinese led fans and a psu fan i got off my dead chinese psu, ill overvolt them all to 24v cause good god these chinese fans are slow, might even run higher volt since it seems like these fans can tolerate pretty high volts considering they run fine at 24v

[HM-2]

Higher flow rates are not necessarily a good thing. Your evaporator is going to be much lower restriction than a typical water cooling radiator so you really won't need much much flow.

 

I do find it odd how you appear to be concerned with electricity costs, but will happily look at pumps with 2-4x the power draw of a D5 (which nobody tends to run above 50% speed anyway...mine is set for 35%)

 

You probably need 1000l/h or less in reality. 

[Somerandomtechyboi]

31 minutes ago, HM-2 said:

You probably need 1000l/h or less in reality. 

Though what h max do i need? Cause my current pump is 1000l/h with hmax of 1m

 

32 minutes ago, HM-2 said:

I do find it odd how you appear to be concerned with electricity costs, but will happily look at pumps with 2-4x the power draw of a D5

Yea im somewhat concerned cause 70w is literally what my tec uses, but if its futureproof and i can still get decent flow out of a larger car rad then sure itll be worth it. Then the secondary concern would be heat output that my evap rad will need to deal with

 

What other pumps should i look at that are dirt cheap but have high h max? Cause i do know h max is apparently the only thing that really matters

[thrasher_565]

probly wont matter at this point no one knows what will work and what wont. just got to try and see. this is far from being optomised

 

in theory the faster the flow the lower the temp to a degree. lets just say it complicated.

[fonzz1e]

• besides power draw, how loud will your pump be? lol
• you'll probably run automotive coolant since yer loop will be mixed metals (40% ethylene glycol + 60% distilled water)
• depending on radiator FPI u might need high static pressure fans (more than 2 mmH2O)

 

[Somerandomtechyboi]

2 hours ago, fonzz1e said:

• besides power draw, how loud will your pump be? lol
• you'll probably run automotive coolant since yer loop will be mixed metals (40% ethylene glycol + 60% distilled water)
• depending on radiator FPI u might need high static pressure fans (more than 2 mmH2O)

 

Def know ill run server fans for static pressure but for now ill have to stick with some chinese fans and run them at 24v to compensate for the prob garbage static pressure, same goes for antifreeze cause mix metal but ill deal with tap water for a short while

 

Prefferably not overly loud, im fine with it being audible but not like my 92mm server fan, since its an aquarium pump itll mostly be vibrations making the noise and my current pump is audible but acceptable by my standards

[AnonymousGuy]

I'm skeptical these pumps will make anywhere close to the head pressure you get out of a D5.  They use paddle wheel impellers which aren't meant for making pressure...and being aquarium pumps they're meant to move water around in an open tank with little resistance.

 

This is the cheap pump I recommend, I've used one in my guest box for years and  it seems to be reliable and quiet and has an impeller concept similar to a D5.  "SC600" is the keyword.

 

https://freezemod.com/product/freezemod-12v-none-brush-dc-pump-sc600b-with-speed-measurement-wire-maximum-flow-450l-h-pu-sc600/

[AnonymousGuy]

On 4/2/2022 at 7:58 AM, HM-2 said:

Higher flow rates are not necessarily a good thing. Your evaporator is going to be much lower restriction than a typical water cooling radiator so you really won't need much much flow.

 

I do find it odd how you appear to be concerned with electricity costs, but will happily look at pumps with 2-4x the power draw of a D5 (which nobody tends to run above 50% speed anyway...mine is set for 35%)

 

You probably need 1000l/h or less in reality. 

When you have a giant radiator you need really crazy flow rate to actually make use of the surface area.  You basically need to create resistance with enough flow so water will fill all the channels equally.  Otherwise if you only have a trickle, water is just going to go in and out in a direct fashion because there's effectively zero resistance there.  It's not going to flow down to the bottom of the radiator.

[ddennis002]

2 minutes ago, AnonymousGuy said:

I'm skeptical these pumps will make anywhere close to the head pressure you get out of a D5.  They use paddle wheel impellers which aren't meant for making pressure...and being aquarium pumps they're meant to move water around in an open tank with little resistance.

I agree, i did this once as a stop gap used a large plastic tub and a 1000gpm pond pump when my d5 went out, and i didn't have the money at the time to replace it. I had to take the jet plates out of the blocks it was just trickling though, and temps were shit.

[Somerandomtechyboi]

43 minutes ago, AnonymousGuy said:

I'm skeptical these pumps will make anywhere close to the head pressure you get out of a D5.  They use paddle wheel impellers which aren't meant for making pressure...and being aquarium pumps they're meant to move water around in an open tank with little resistance.

 

This is the cheap pump I recommend, I've used one in my guest box for years and  it seems to be reliable and quiet and has an impeller concept similar to a D5.  "SC600" is the keyword.

 

https://freezemod.com/product/freezemod-12v-none-brush-dc-pump-sc600b-with-speed-measurement-wire-maximum-flow-450l-h-pu-sc600/

Im having doubts that itll even work for me cause sure h max is good but flowrate is abysmal, also its tiny g1/4 and i am gonna run 5/8 inch tubing cause rad needs big tubing and ill effectively be splitting that into 4 3/8 inch tubing cause thats how many heatpipes my chinese tower has

 

Any other cheap alternatives with good h max while being able to use big tubes and not be expensive?

[AnonymousGuy]

15 hours ago, Somerandomtechyboi said:

Im having doubts that itll even work for me cause sure h max is good but flowrate is abysmal, also its tiny g1/4 and i am gonna run 5/8 inch tubing cause rad needs big tubing and ill effectively be splitting that into 4 3/8 inch tubing cause thats how many heatpipes my chinese tower has

 

Any other cheap alternatives with good h max while being able to use big tubes and not be expensive?

For <$20 not really.  Used Iwaki pumps you can find for ~$50: https://www.ebay.com/itm/234411730657?hash=item36940726e1:g:n8UAAOSwUG9iAhFZ

 

 

[Somerandomtechyboi]

1 hour ago, AnonymousGuy said:

For <$20 not really.  Used Iwaki pumps you can find for ~$50: https://www.ebay.com/itm/234411730657?hash=item36940726e1:g:n8UAAOSwUG9iAhFZ

 

 

Oh ffs and this is already overbudget not to mention inaccessible since i dont use ebay

 

Tbh i think ill just go get the kcr 107 and be done with it, 5m hmax should be fine for a little while and its only 10$, main issue is ofc power draw but my 480mm rad is pretty thicc so it should be managable

[HM-2]

On 4/5/2022 at 4:00 AM, AnonymousGuy said:

When you have a giant radiator you need really crazy flow rate to actually make use of the surface area.  You basically need to create resistance with enough flow so water will fill all the channels equally.  Otherwise if you only have a trickle, water is just going to go in and out in a direct fashion because there's effectively zero resistance there.  It's not going to flow down to the bottom of the radiator.

Effective flow rate is a product of much more than pump LPH, and 1000L/H is in keeping with what you'd see through most smaller automotive heat exchangers.