You can avoid the copper washers! The main reason to change them is under compression the copper work hardens to seal up. To get a good seal though you just nee

You can avoid the copper washers! The main reason to change them is under compression the copper work hardens to seal up. To get a good seal though you just need to re-anneal the copper so it's soft - heat it to cherry red and let it cool down. Takes about 5-10 seconds with a blowtorch - I've been doing it for oil changes on my car for several years now with no problems.