To day my two new filters arrived for my 11lts tanks so was quite happy.
So got my spare air pump out to use it while they got up to speed before removing the old diy job
I had two one I found forgotten and one I had replaced I for got that these two 802 doubles only had one operational outlet so I decide to exchange diaphragm so I would have two working outlets

Thus out came the tools first I removed both bottoms so I could see in side then I plug each in so I could id which was working properly and marked with tipp-ex (extreme caution should be take we don’t want a shock)


Then I unscrewed diaphragm, arm and chamber


And removed


This I then disasembled

The arm and diaphragm shown here show a lift and right arm (please note use the correct arm for the side it will be used on in the past I used the wrong arm and it lasted no time)


You will note in the center of the diaphragm the screw this will unscrew the diaphragm from the arm

And replaced with my spare then I just re assembled


It is important to note do not over tighten any screws! You do not want to rip diaphragm or crack housing as air will escape

And here it is running the filter

thanks for that Mickey
i need to do this job soon
so its good to see how its done

Oh you meant THAT kinda diaphram

Mickey why oh why couldn't you have done this months ago before i totally F*%@ed up my last pump,typical.. still at least i'll know if ever i decide to use one of these again
Cheers
Seamus

I was thinking the same thing Seamus
but i said no keep it clean

I know shame on me and silly me putting it away safely and forgetting where they are. But the biggest reason for putting it up now is Catherine got a new camera that will let you see these things.

I also find it useful to do it the ARMY way the first bit off goes to the left then work to the right and when it comes to reassembling I work right to left.

And yes I have a paper arrow to remind me which way i am working!