Hey,
Where is the best place to go to get 6"/150mm 90 degree PVC bends.
I went into bunnings and the largest they had was 4".
Any help would be much appreciated.

Try a plumming supply store?

or an irrigation store.

any decent sized bunnings will have it

plumBing

but any big bunning, any irrigation supplies shop, or any plumbing place should stock it

I hate to sound rude, but why post if what you're saying has already been brought up in this thread? You're just repeating what's already been said.

beacuse i wanted to be a smartarse and post what everyone else was thinking...why be so bitter???

I remember a tutorial a while ago that mentioned it is possible to bend the PVC to suit your application using a heat gun and sand.
Memory going soft here, but apparently...
cap one end of the pipe, fill it with sand, and then heat (carefully) the area you want to bend, and slowly bend it manually.
The sand was used to keep the shape to allow the same surface area internally, and not just kink it.
The heating method should be the same as for flaring the end of the pipe too.

Anyone else remember this method?