I went to take some measurements of the Valterra EZ Valve Double Electric Waste Valves # E85-8 and found it was about 12 inches wide as in the accompanying photo.
The depth was more difficult because it is electric and there are wires on either side but you would need 8 inches at the least for it to fit, so a space that is about 12-1/2" by 8" minimum would be needed.
Also keep in mind that you will need to use ABS Solvent Cement # A05-0303 for installation. view full answer...
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