to be honest i tried mild first but the use of different steels caused different expansion rates and caused poor sealing and cracking ,its best to go straight to stainless and its easier to fabricate….
Cheers lads, @dannyp, good suggestion but over here in ireland that’s definately a non runner unfortunateely but thanks for your input.
@solomk1 Cheers mate, think i’ll go the stainless route alright, what diametre did you use?? 2.5” ??