Just shooting from the hip.....(and opinionated!)
But PVC is used in drainage, not supply.
CPVC can be used for supply.
CPVC has a melting point of 212C and working temp of 90C (but where is its outgassing point?)
Plastics are usually made from oil/petroleum doesn't sound all that safe to me. (especially at elevated temps) Many thing were deemed safe then taken off the market. BPA, Asbestos, etc.
Brass isn't all that much more, why risk it? Spend all that time, money and effort on the beer/ingredients just to skimp there? (weakest link saying comes to mind)
quoted from Wiki:
CPVC Comparison to polyvinyl chloride (PVC)
Chemical resistance
CPVC as well as PVC exhibits a good resistance to acids and bases (depending on the acid/base). There are several cases where it is useful to stay with PVC (e.g. ammonia hydrous solution, hydrofluoric acid). Additionally, it exhibits excellent resistance to salts and aliphatic hydrocarbons.
Since the chemical properties of resins may vary according to the amount of chlorination and the types and quantity of additives, manufacturers' recommendations should be consulted before designing material handling systems using CPVC.
Heat resistance
CPVC can withstand corrosive water at temperatures greater than PVC, typically 40°C to 50°C (104°F to 122°F) or higher, contributing to its popularity as a material for water piping systems in residential as well as commercial construction.
Mechanical properties
The principal mechanical difference between CPVC and PVC is that CPVC is significantly more ductile, allowing greater flexure and crush resistance. Additionally, the mechanical strength of CPVC makes it a viable candidate to replace many types of metal pipe in conditions where metal's susceptibility to corrosion limits its use.
Fire properties
CPVC is similar to PVC in resistance to fire. It is typically very difficult to ignite and tends to self-extinguish when not in a directly applied flame.
Due to its chlorine content, the incineration of CPVC, either in a fire or in an industrial disposal process, can result in the creation of dioxins.
OK- so yeah im digging up older stuff here but......
Why arnt more people using pvc for the MLT converstion instead of brass or SS.
Yes metal is cool and all but isnt the pvc fittings just as good?
So the thing about leaching ~ what about the plastic cooler that your mashing in.... isnt that some type of pvc plastics? is it any more designed to handle the heat that would pull chemicals out of pvc pipe/fittings????????
Explain please...