So to do the mods first is the water return line that supplies the heater.
It had to be shortened to allow the 3 inch line
This is the bypass water return to the heater which is in the way for my 3 inch line.
So with another pipe i had it shortened and a u return welded on.
This way all ill have to do is shorten the hose so as not to make a new one.
and now just make the line.
For those who havent seen how i make them here is the process
This is the pipe exterior, 3 inch line that will feed the Rotrex.I turned some pine to the correct diameter , used a little filler then sprayed it with filler
Now ill make the inner diameter of the pipe and then pour urethane in between.
Just a pic to show the difference with the previous mould
[URL=http://img816.imageshack.us/i/dscf7299.jpg/]
First made a box out of MDF , put the outside pipe profile in and poured the silicon rubber
This is the rubber sections
This pic shows the inside profile of the mould ready for the urethane to be poured.
This is the urethane poured
This is with the pipe removed
This is the final piece removed from the mould.
As you can see the are quite a few steps in making the piece.
Either way i have permanent moulds to make them again.
They need to be final sanded , machined and then powder coated.
So here is the aluminium cast of the above mould.
Came out great.
On to the next piece. Long process but i enjoy doing it.
Now it of to the machine shop.
3 inch line. Now roughly 2.5 times bigger than the first one i did. Surely now it wont be restricted
