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We used a line wrench to loosen and tighten the 3/8-inch line fittingwhile holding the hose with an 1116-inch wrench. If you have troubleremoving the line fitting nut, cut the old hose off and apply heat witha torch on the hose fitting. This process works well and keeps thefitting in good shape. Make sure you cut the old rubber hose so it canbreathe or it will blow off at high speed.