March Pump For Whirlpool

[Pumpy]

we not alone Sav read this

http://www.aussiehomebrewer.com/forum//ind...c=14882&hl=

 

[Yorg]

The issue with the March unit's whirlpool flow - leaving aside the priming discussion - stems at least partly from it using the same pump head as that sold in the US, but running at 50hz not 60Hz power. This means we are getting a lot less head from this pump compared to what is the norm there - and its not proportional to the 10 Hz difference, its worse.
The solution for us is to purchase an impeller designed for the 815 model, and place it in our 809 head - drops straight in.
I have done this - process pumps recommended the solution, and charge about $60 for the part.
This brings the spec up to about the same as an 809 running at 60Hz.
This should provide a better whirlpool, though Andy's comments about the physics are valid.
Still, if you have a few elbows, some length of plumbing and a pump mounted low, like I have, getting any whirlpool at all is a problem, and this should make all the difference for you.

Here are a couple of pics.

 

[roller997]

The issue with the March unit's whirlpool flow - leaving aside the priming discussion - stems at least partly from it using the same pump head as that sold in the US, but running at 50hz not 60Hz power. This means we are getting a lot less head from this pump compared to what is the norm there - and its not proportional to the 10 Hz difference, its worse.
The solution for us is to purchase an impeller designed for the 815 model, and place it in our 809 head - drops straight in.
I have done this - process pumps recommended the solution, and charge about $60 for the part.
This brings the spec up to about the same as an 809 running at 60Hz.
This should provide a better whirlpool, though Andy's comments about the physics are valid.
Still, if you have a few elbows, some length of plumbing and a pump mounted low, like I have, getting any whirlpool at all is a problem, and this should make all the difference for you.

Here are a couple of pics.

I purchased one of the impellor upgrades as well from Process Pumps. Haven't installed it but for my kettle pump, I was intending on performing the upgrade to get more power through the March pump.
Seeing that it is quite a bit longer, it is very likely that it will also remove the niggly issue if you have air in your pump since the air bubbles would be less likekly to be pushed out with the shorter impellor limbs.
Have you found that it is easier to prime and less prone to mis-behaving because of air in the head since you installed the upgraded impellor?

Thanks

Roller