On Aug 29, 4:38 pm, terry wrote:
Have 90 degree one inch diam. grey plastic tubing 90 deg. bend.

Want to bend it some more; hopefully to 180 degrees (or close to that)
to make shape of a 'J'.

Any suggestions. Heat gun? Flame? Oven? Also will it tend to flatten
as metal pipe does when bent further?

If this doesn't work could I use something else; that newer PEX water
piping for example?

Help/advice appreciated. TIA

They sell a lot of pre formed fittings. Google LB, LR, LL.

Also you can put the pipe in the oven. It helps to have water handy.
Get the pipe warm, then dry fit it in place and douse with water.