I have a petcock for my 1980G that has no intake filter. I have found some on line for 35.00 but that is a pretty high price if I can do otherwise. Could I source copper line the same size a s the inlet pipes and use the universal type filters I find much cheaper. or, should I just purchase this from Mikes XS for $30.00 complete?www.mikesxs.net/catalogsearch/result/?q=non+vacuum+petcock