6100 impellor help please

[mark97r6]

hey guys,
I wasnt sure if i should post this in Filtration or controls... So please move if i picked the wrong one!

Right then, as im currently moving tanks i have given my pumps and things a real good vinegar soak. When stripping down my 5 Tunze 6100's to soak the impellors, i got a bit of a surprise! they have different impellors!!
I have 3 like this one;

This i beleve to be correct as it has the brakes on for the 6100.
But the other 2 are like this;

As you can see they have no brakes on and are a quite different impellor! Is this an old version?
This is them all for comparison;

I only have 3 (not sure which 3) out of the 5 on my controller, the other 2 run full 24/7 so i dont know if they are able to vary the speed.
Anybody else cum across these? They were all bought around the same time. Are they infact 6100's? It says so on the back but who knows what they are kicking out and there might only be an impellor difference between 2 models? If i buy a replacement impellor with brakes on can i fit it to these?
Any help?

Cheers
Mark

 

[rvitko]

The three with brakes are older ones, some look to have bigger propellers (could be the photo), these are 6200 propellers, they should have 48 in small print at the tip where the screw goes in. That is 48mm. The 6100 props will say 42. The two without brakes are the new style. The new ones will fit in old pumps.

 

[mark97r6]

Thanks alot for that.
I was a little worried there. I cant spot any numbers on them but they all look the same size, probebly just the picture.

Thanks for your help
Mark