hi guys i was trying to think of a cheap way to make a good quality swirl filter. my system will be run as two seperate systems and i need two filters,this is the way i did it. you need a plastic welder which worked for me cause i wanted a good reason to get a plastic welder.i used two drums to make one filter, i was hoping to make it out of one but their isnt enough material to work with, you could make two filters out of two drums if you were happy to use the top of the drum as a base of a filter.this one is just a test to see if i could get the plastic to form the cone.
First i made a template.Their is a good free metric cone calculator at
This is the drum i cut the cone out of, you can see thier is enough material to make another cone
this is the finshed cone,the plastic forms the cone pretty easily i just rolled it up like a cone and then clamped it to weld
Like my scroll saw. I used it to trim the excess material from the fitting that i cut of the top of one of the drums. No responsibility is taken by me for the loss of fingers if you try this at home.
I decided to put this fitting in the base of the drum because these drums dont have flat bottons to seal on and you dont have to buy a fitting for it
this is the finished product not bad for a first try, all the welds turned out good,its really strongand no leaks
when i make the the real ones i will do a few things differently, use a drum with a large lid and section it so its chopped low and i will get some proper hdpe threaded fittings for the inlet and outlet and use a jig to keep it round this one is a bit out of round.if anyone wants it in perth make a offer