601 Series Replacement ElementsThese replacement filter elements are specifically designed for our 601 Series Filters. They are easy to installsimply insert them into the inside of the outlet end fitting. Ensure the O ring within the filter is properly oiled before installation to maintain a secure seal. Remember to replace them during filter servicing or when reusing filters for different applications. It's always a good idea to keep a few spares in your toolboxyou never know when