^ We believe there can be long term seal issues in this configuration.
The 750 is designed for low restriction / low back pressure operation.

Also it is not a designed to run low flow, like many other DC pumps. The MAG can run zero flow 24/7, just like an AC pump, and is your best choice of these very restrictive blocks from europe.

There is no need to be concerned about inlet or outlet restrictions, unlike other DC pumps, you can install as you would an AC pump like the Eheim models.

The problem with pumps with shafts (which the MAG is not) is that the seal is designed for low pressure (suction at the center, high pressure towards the circumference). If you run shafted pumps in series, the second pump's seal is now "backwards" as there's now pressure there.
Caveat: I've never seen a 750 "in person" and have definitely never dissected one to see the seal within - this is all from what I've read on the web - and the little bit I know about seals (was a bike mechanic a very long time ago).

The MAG is still on pre-order at D-tek so it hasn't been shipped yet.

I have another question. How does the sound/noise level of the MAG pump compare to the 750?

^ Very low.
We use a larger, low rpm impeller to reduce even the pumping noise.

D-Tek pumps shipped, we even shipped them some more today. I know because they had to ask me for there new address.

Sheesh I can't hear the pump even with it sitting directly in front of me.
Even temperature wise I feel no difference between the warm water entering the pump from the block than I do exiting the pump to the radiator.
Personally I think C-systems has a winner!

Yep, and a bitch to test.
I often have to pick the test pumps up to know if there running.

LOL ...even picking it up I'm still not always sure!

So how close are we to seeing some of these dave?

Curious as some sites (like dtek) have listed a 1week eta for more around a month :shrug: Still have mine preordered though :D

^No idea for D-Tek, shipped twice to them so far that I know of.
Retail MAG's are in high demand, and we are already facing another expension do to OEM / industrial demand alone.

They approved the $$ for Delrin case mold, so that will help out alot when it comes online :)

C-Systems put me on for another 20 hours per week to help with contract developed products, so there goes my summer.

Our stock arrived today - rear inlet, delrin... only received 20 or so.... rest are on their way.

Dtek is no longer offering pre-orders for the Mags, looks like they are ready to start shipping these beauties.

apparantly a shipment came in this morning and my two shipped out to me by noon.

Thats a good sign, hopefully my twins will ship out soon then :cool:

When should we expect something from cathar? I know he does like to take his time with things and do them properly but I am sure a quick top 3 pump comparison is in order.

Im hoping for a big pump roundup soon with the Mags included, its been a while since ive seen something that really puts all the new ones to the test.

Also hoping for a nice review soon...

By the way, why is there no CSP-MAG pump with TOP inlet and G 1/4 port ??

Well, my pair shipped out this morning from Dtek :cool:

edit: I can't read.

I was told by dtek that theirs will be rear inlet and G 1/4 with custom barbs to accomodate 1/2" tubing. I'm sure you can order with the 3/8" custom as well.

Yes G 1/4 listed

I have not sent Cathers pumps yet, sales took all my review samples :(

I made some myself this weekend; hope to get his out this week.

D-Teks pumps are NOT supported by C-Systems, and they are not standard G 1/4 ports. A standard G 1/4 fitting will work in them, but a D-Tek fittings will not work in a standard G 1/4 port, there too long.

Also there seems to be some confusion about upgrade program.
You can only upgrade via a purchase from C-Systems site, states so on our FAQ upgrade page.

I suggested to a customer he purchase a pump from D-Tek because they are closer, and people may have read this as a upgrade endorsement.

If so I do apologize, and I have edit my post to make this clear.

Not that isn't enough bad news, I also need to tell all, retail production will soon shut down for 3-6 weeks, well C-Systems re-tools and expands for our ever growing OEM market.

We will have all back orders completed before this occurs.


Again sorry for any confusion all.

Dave
C-Systems Support

Thanks for the update - I was wondering what was going on - but had simply thought that the vagaries of international mail was taking its time.

One package I shipped to the USA took 10 weeks to get there when most everything else I sent took 4-10 working days.

One package I sent to Japan arrived at its destination 3 months later by way of going to the UK first, despite it being clearly labeled JAPAN everywhere.

^ Oh really?
Ok I will get approval for Xpress post shipment Cather, just like UPS but 1/2 the costs.

Should get there in good time.

I would do it today, but upper management types all away for some big meeting, and I need to ask first.

I just full of bad news today, should go home a sleep this bad day off before something else happens!

Will this pump work under PWM?

I'm running a fairly advanced controller, the mcubed T-Balancerand would love to have it control my pump.

^ I tested the pump with as many fan controllers I could find, but not this one.
If you use RPM feedback, you should be safe.

You need to make sure the pump doesn't stop as your CPU temps go to high.
The pump itself is safe to use with controller, just remember you need up to 8W constant.

Most of our OEM/ industrial customers use PWM controllers in a PPL type circuit to control rpm at a specific value.

I might well go for it as it is using RPM and is rated at 15W per channel.

I have not such a good opinion of C-Systems. I prefer to wait for reviews and user impressions. And since I can wait I prefer to wait for TOP G1/4 ports (because of its compacity) and for improved propeler (for improved pressure).

well today is the day, I will post some pics when I get mine in today

Delivery Day
 

http://www.2bitsystems.com/pics/pumps1.jpg
http://www.2bitsystems.com/pics/pumps2.jpg

Twin CSP-MAGs from Dtek, 3/8 chrome barbs, rear inlet. These fit quit snug so there should be no problem with leakage I think. Hopefully ill get these hooked up soon. Until then, enjoy the pics.

^ looks like the black and silver look good with your computer and desk colors.

Be sure to check for leaks, some people have reported a leak out the open bolt hole right near the outlet fitting. This would be on the back side.

So far just been NPT fittings, and you just need to screw the fitting in another 1/4-1/2 turn.

The threads are cutting into the bolt hole, and not sealing proper.

This was my fault as the operator used my program to cut first run. On the drawings and sample I sent to AVT, the hole was not all the way through.

We only had one small run with this issue, if you have any problems just email me and I'll send you a new chamber half.

We leak test all pumps, but this problem only happens when you do the final fitting screw down, and does not show up on line test.

I tested all of D-Teks other shipment and could not reproduce the problem with there fittings.

* Note this is not an endorsement of C-System supporting D-Tek products.
Just letting everyone know of any issue we find.
**Delrin case NPT only so far, no AL case problems reported.