Internet out yesterday, so finally the pictures for the previous post:
1. Full unit with top-plate in it as well.
2. Top plate removed
3. Drain with air-pipe front.
4. Looking in the drain from the top.
5. The bottom-plate with the 2 rings glued and epoxy to be 200% sure.
6. Bottom plate from the top.
The 2 PVC rings, after glueing them together and pushing in the small wedge, became a solid ring with nothing to spare on the flange. Had to send out a little bit and then used a hammer to slowly get it on the aluminium flange. Went on without glue, but they really are solid and water-tight around the flange.
The drain-assembly slides on very easy and I'll get it glued together once we are ready to install at the pond.
Just to be sure, I used 2-part epoxy and filled in between the aluminium and plastic as well as the opening from top-plate to flange. So there's absolutely no way water can go anywhere.
I can now get the Drain-pipe, dig the trench further to horizontal and then put the pipe and glue all together.
The ugly blue / brown ring on top is a quick and dirty air-ring. Drilled a lot of holes and air comes straight through the pipe that is used to screw the dome on.
Plate is a simple plastic dinner-plate, hole in the middle, epoxy and a pipe-fitting. Can just unscrew it without messing with airlines to unhook from the diffuser. Makes for easy changing that part as well if I ever want to.
Best part: Total cost is THB 200 or about USD 6.50
This compares to USD 100 - 150 for a 'professional' one.
Cheers,
Luc