I spent 2 years trying different elements and fittings. I ran water and PBW through the sytem to clean and test prior to brewing. Testing was good was able to hold about 1 degree. Took it all apart to see who thing looked. Found all the coating eaten off the element and it was rusted like it was 20 years old all in about 30 to 45 min of testing. Went through several different heating elements none worked. I must admit I never brewed until I it could pass the clean test. All the element I could find we not stainless steel they were some type of plated steel and the PBW ate them clean down to bare metal. Found a Stainless steel element at SABCO | Heating Element it's a little pricey but it works great and has the tri-clover end on it.