Originally Posted by Huaco
I have to pose a question... Is Lock-line or Flexible coolant line really that great of a deal? From guys that have used it for extended times they say it doesn't last more than a year of brewing. Most of these are not intended for food contact. That being the case, what will be leaching out of the plastic as you mash. Most of these lock lines are rated only to about 150*F. Much less than the 168*F mash out temps that many brewers hold. If these are degrading to the point of failure in just a YEAR, and most brewers only brew once or twice a month at most... That tells me that these things degrade pretty quickly which would also mean they are leaching a massive amount of crap into your hot wort!
If I could make a suggestion, why not go with a silicone tube wrapped around the top of the grainbed and recirulate/sparge with that? Silicone is food safe.
I've been using the same white loc-line for about 3 years with no signs of degradation. Loc-line most certainly is food safe.
Qouted from Loc-line website:
Q: Is Loc-Line safe for food contact?
A: The material used to manufacture Loc-Line is an acetal copolymer. This material, in accordance to the rules 21 CFR 177.2470, meets the requirements of this regulation for aqueous food contact. Not applicable for fatty foods and alcohol. All colorants are used at the recommended let-down ratio and meet 21 CFR 178-3297 for food contact.
Melting Point: 329°F
Maximum Operating Temperature: 170°F