Making 3 gallon batches, 5 gallon pot and mash tun. I heat 4-5 gals in the brew pot and use it for strike and sparge water. Problem is the plastic bucket I drained the mash into appeared deformed by the heat, worried that it could fail and/or hot melting plastic may not be the best thing to contact wort. Do I need to boil in another 5 gal pot ? I'm thinking about scaling up to larger brew batches and think it may be excessive to need two 40gt pots.. Wondering what the common practice is ?