March Pump Impeller Upgrade

[msjulian]

Wow!! Just got the new impeller in for my pump.... time to bump up the horsepower.

impeller.jpg

[msjulian]

Just finished up a Belgian Quad with the new pump impeller. It made all the difference in the world. Not only did I get better flow but all the priming issues are gone. This thing fired up and acted just like a self priming pump. I usually have to lower the outlet side hose so it is lower then the pump to get everything going. With the new impeller I did not have to disconnect any of the lines to get the pump flowing.

Doing some research on putting the 815 impeller kit in the 809 I have found that if you do not have the 809-HS pump the 815 impeller will not increase your flow rate. After today's brew session I think that the fact that it fires up without the need of purging the air out of the pump head far outweighs the increased flow.

So, if you have a 809 or 809-HS I would highly recommend the 815 impeller kit upgrade.

Here is a link to the Web site that I purchased from.

http://www.tescopumps.com/servlet/the-5 ... 000/Detail

[Don]

Looks like Michael is on to something, I found a post in another Brew site form by a March Pump Rep
"the 815 impeller has a stronger magnet and can take the torque and will work no problem with any of the pump heads in the 809 family..."
"The HF impeller (The larger on in the pic above) actually has a stronger magnet then the standard 809 impellers do. All these pump were orriginaly designed for specific applications and have since been used for so many variations that over the years we have made them more or less fool proof to the point we now have. The reason for the smaller impeller on the HS models is that the motor spins at 3400RPM and places a bigger stress load on the magnetic coupling. For us, not knowing where the pump may be used we gave it a smaller impeller so the pump is less likely to de-couple. For water type applications you could use the bigger impeller out of the standard 809 (slow speed 1750rpm) and never have a problem......but once you put something heavier into the pump then the mag-drive would de-couple and you would be on the phone with us complaining!

-Walter"

I'm ordering mine today.
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Here is another post from an upgraded pump user I found online.

Here is a summary of my results, using 5 gallons of water, with about 4 feet of vertical and 2 x 3ft 1/2'' tubing.
Standard Impeller Upgraded Impeller
Trial #1 01:07.9- 00:43.6
Trial #2 01:01.3- 00:48.8
Trial #3 01:08.5- 00:50.1
Trial #4 01:05.7- 00:53.5
Trial #5 01:05.8- 00:49.0
Average 66 sec - 49 sec
Gal / Min 4.56 - 6.12
% Increase 34%

All in all, worth the $29.

[BREWsmith]

I just installed my new 815 impellers. Neither of my pumps originally had the small white washer. I put it on followed by the impeller. Is this correct?

[msjulian]

The thrust washer goes on the fin side not the magnet side. It is just a spacer to keep the fins from getting into the housing