I am trying to figure out how to properly vent a new washing machine drain line that will tie into an existing drain; however, the existing drain is 10.5' away from the washing machine drain.
Sources seem to indicate this is either fine, or needs to have a vent within 5' or 8' of the washing machine p-trap. The first figure shows the setup.
Is this setup ok as is, b/c the existing vent is above the water line of the washing machine p-trap? (See https://www.jlconline.com/how-to/plumbing/maximum-length-for-fixture-drains_o).
Or do I need to add in a vent for the washing machine? If so, can I connect it to the existing vent to keep from having to run a second vent line. See the second figure.
Thanks in advance for any help!