[quote=“Brew On”]Hey GarretD,
Typically ss washers you buy from a hardware store would be made from a 300 series of ss which would typically be very, very weak magneticly but due to some manufacturing processes can make them more magnetic. So a magnet test can be misleading. The zinc one will be magnetic for sure, so a weak magnet would stick easier to zinc plated washer than a ss washer. Maybe try a vinyl refrigerator magnet, they tend to be weak.
Zinc plating can have a bluish hint to it or even yellow, maybe a very, very slight mottled iridescent in the right light and reflection. SS will be more dull grey.
Use a file and file down a edge to get past the zinc plating. Place the washer in a salt solution for half a day, as long as you filed past a coating, the inner steel will start to have rust on it. SS should not look to be corroded as long as you didn’t transfer and embed steel particles from the file into the ss.
I would go to the effort to be sure to use ss on the inside. As far as hard plastic goes, it depends on the plastic. What seems like a stiff, resilient plastic at room temp can become soft and yielding at mash temps.
Why not make sure and use ss washers in and out? IIRC I had to tweak the inside diameter of the washer very slightly with a file or maybe it was the thread on the nipple. ???
I hope this was helpful. Good Luck!!
Thanks! The magnet trick is spot on as the zinc one stuck to it like glue and the SS on did not at all. I guess I’ll have to find a way to increase the hole size.
I am a bit confused though…I guess I assumed the SS washer is just a coated washer…so if I increase the hole it will expose what the real washer is. Are SS washers solid SS?