Do any of the DEWALT pressure washers include a muffler cap or spark arrestor? Support November 06, 2020 16:51 Updated Follow No, none of the DEWALT pressure washers include a muffler cap or spark arrestor. Related articles Who can I contact for support with my gas powered pressure washer? I would like to contact DEWALT customer service Where can I buy DEWALT tools? Where can my product be repaired under warranty? Where can I start an online warranty repair claim? Comments 0 comments Please sign in to leave a comment.