Which D5 pump should i buy?

[bullydog]

I just bought a Koolance RP-452X2 Dual 5.25in Reservoir Rev1.2 and will need to get 2 D5 pumps to run it, but the problem is there are so many types of D5 on the market and i know they are all based on the Liang series pumps but i was just wondering if those pumps i've short listed below is worthy to buy as Swiftech now offers PWM mode and Aquacomputer offers RPM signal and its made in Europe instead of China, the XSPC should just be the normal rebadge unit of the Liang pump.
Aquacomputer D5 Pump Mechanics with RPM Signal

*** NEW *** Swiftech MCP655-PWM 12v Water Pump Module - PWM Enabled (Single Version)

*** NEW *** XSPC D5 Vario Pump - Without Cover

I was thinking of getting those units without speed control as i dont have any intention to run it on any lower speed other than at level 5

Thanks in advance

[Deton]

My D5s are all Swiftech due to avaliability and they haven't fail on me yet. They are all speed adjustable and I always keep it at #5. However, two at max speed can be very noisy. The reason I didn't turn down the speed because I want maximum performance. Therefore, I would go with PWM instead of RPM, because RPM is only displaying the pump speeds.

As for the res, I do have the RP-452X2 R 1.2. Beware it's still very hard to prime and bleeding, it will make a lot of noise until it's completely bled and they can they HOURRRRRRRRS. However, after all air are all gone then no more coolant chugging.

What was the reason you bought the Revision 1.2 instead of 2?

[bullydog]

Thanks deton, I got the rev1.2 as I'm getting a good price. I also prefer the L-shaped window design of the 1.2 over the2.0.
Heard lots of prime n bleed issues with this pump, but I'm going to give it a shot. Do u know why koolance discontinued the other dual bay reservoir that could fit 2xmcp355 pumps ? I really like that one more.

Do u know if my airplex is able to run dual loops ? Especially when mine is a single circuit

Thanks again for your inputs n recommendation

My D5s are all Swiftech due to avaliability and they haven't fail on me yet. They are all speed adjustable and I always keep it at #5. However, two at max speed can be very noisy. The reason I didn't turn down the speed because I want maximum performance. Therefore, I would go with PWM instead of RPM, because RPM is only displaying the pump speeds.

As for the res, I do have the RP-452X2 R 1.2. Beware it's still very hard to prime and bleeding, it will make a lot of noise until it's completely bled and they can they HOURRRRRRRRS. However, after all air are all gone then no more coolant chugging.

What was the reason you bought the Revision 1.2 instead of 2?

[Deton]

I didn't aware Koolance discontinue the other res

but this one is till listing on their site thought



As for AMS, you can do parallel setup but it's still a common radiator unlike the dual circuit AMS, it divides into 70/30 rads.

Here's tip to help you do priming the 452X2 res in series setup.
use the pump in Res #1 for priming, disable the pump #2, you can turn the pump down if you like, this eliminate the excess air bubbles, keep the filler port open, let the pump runs until you see no bubbles left in the res then you can turn on the second pump. However, when the second kick-in it will create more bubbles, just let two pumps running until you see no bubbles in the res, and don't top the res to full.

Good luck....you know where I am if you need help.

[Solara2xb]

I had the Koolance 452x2 Rev 1.2 res for my Th10 build for a while with 2x MCP655 pumps installed set at 5 and for the life of me I was never able to get the combo to run silently no mater want I did, I think I spent about 8 hours bleeding and priming the unit and still wasn't quiet enough for my liking. Don't get me wrong, its a great looking unit if you don't mind all the work. But IMO, it was such in pain if I ever have to drain and refill again I decided to get rid of it. I think I sold it for like $80 to someone on overclock.net.

Now I use the EK top for 2x MCP655 and my pumps are SILENT, I can't even here them on unless I put my ear up to it and I am using a XSPC -Single 5.25" bay res in the loop and I can get it drained and refilled in a matter of 1 hr. Easiest set-up I have works with.

[Deton]

Kenny I know how you feel.
My is no longer making chugging noises but the noise I heard now is the pump humming via vibration through the case. Yes, it's very pain to bleed if there is air in the loop.
Now I can't wait to the day I have to redo the filling of the loop....

[Solara2xb]

Kenny I know how you feel.
My is no longer making chugging noises but the noise I heard now is the pump humming via vibration through the case. Yes, it's very pain to bleed if there is air in the loop.
Now I can't wait to the day I have to redo the filling of the loop....

yea, thats going to be a fun day!. lolz

[bullydog]

Wow seems like guys had massive efforts to bleed and prime this res! OMG im getting worried now...i hope mine does fine

Deton thanks for the tip, sounds like a plan, i will need lots of time to get this thing running, i really do not want to install this res and spend 3 days priming and bleeding this res.

What do you think is causing this res to take so long to bleed? is it the poor design or due to the pump being integrated into the res itself?

[Deton]

Design problem, especially in series setup.