help with leaky compression fittings
So, just put all my plumbing back together, a million sweated joints, none of them leaking a drop, shutoff valves on sink and toilet also leak free.
i have chrome looking supply lines to the tub, that come down into a brass compression fitting, which is threaded onto a copper adapter.
the end that goes into the tub faucet just has a rubber washer with a nut behind it. no leaks from that end.
the other end has a little brass washer that's slightly wider int he middle, with a nut behind it, apparently meant to be compressed onto the supply line and seal it.
the hot side seems to be OK. the cold has a slow bead drip. i've wailed the down to the point that the entire supply line starts to turn, along with all the copper below it.
there must be some kind of better system? can i use a rubber washer instead of the brass one?
any cleaner, tighter way to get from copper to supply line?