Hey guys currently I'm working on upgrading to a RIMS system. The design I found calls for 2" Stainless steel fittings. All said and done the fittings for the element chamber in SS come to over 200$. Much more then is in the budget. Can you use copper, or brass? Does the chamber need to be 2" diameter seeing as the element is threaded for a 1" hole. I appreciate your help, pictures of your non SS RIMS heating element chamber welcome. Thanks.