Heard about these about 2yrs back, and have been curious about them ever since. Well my curiosity has gotten the better of me and I've ordered one of these:
March 893-09
Yes - the model number on the picture is a typo.
Very small. 10cm long x 7cm high x 6cm wide.
Being an industry quality pump, has a fully qualified 50,000hrs MTBF with a fully sealed (and submersible) brushless DC motor.
12VDC. 12W peak power consumption in wide-open mode. I would imagine it would draw less when operating against resistance.
According to the sales engineer who has heard both, says it's near silent and quite a deal quieter than the Laing D4.
It has a peak pressure and flow rate very similar to the old Swiftech MCP600, but it's PQ curve is more attractive than the MCP600 with it still offering very good pressure (~2.15mH2O) at 2gpm, unlike the MCP600's ~1.5mH2O.
For moderate to highly restrictive systems, the PQ curve implies that it would offer flow rates that very closely matches the newer muffled Laing D4 revisions at anything up to around 8LPM (~2.1GPM), and still be drawing substantially less power, and due to the separated magnetic armature (like the MCP600's had) be putting less heat into the water as well (I would estimate about half).
The pump comes with either 3/8" or 1/2" OD outlets, and people can fit whatever barb size they want on the inlet. Personally I'll be fitting a 5/8" OD barb on the inlet.
Rated voltage operational range is 7-14v.
Once I get this baby I'll assemble a full 12v pump lineup review which will include the following:
Davies-Craig EBP (Australian automotive cooling system booster pump)
Swiftech MCP600
Swiftech MCP650
Laing D4 (original non-muffled version)
March 893-09-1/2 (1/2" outlet version of 893)
Will assess peak flow, peak pressure, pump power draw, pump power->water heat transfer ratio, and measured flow rates in a full system, along with estimated flow rates for some hypothetical systems.
Only drawback is the price. $125US for a single pump through the local USA reseller I tried. I would imagine that in bulk with the "usual" water-cooling market tight margins, a company might be able to offer it for ~$100US if sourced direct from the manufacturer.
But do the D4 at 7V make more noise than the unmodified Eheim 1048? I speak about unmodified 1048 because I have absolutely no idea how I could make the 1048 quieter... Is it easy? That pump is big but I could accept it if it's the quietest and as reliable as the D4.
