Hello Everyone. I'm finishing my basement which has a rough in for a bathroom. I'm going to install a shower and wanted to know what size wood to use for the water wall frame. I framed the wall for the vent/drain line with 2x6's to accommodate the drain line for the sink. My question is the wall where the shower head will be located, should I frame it out with 2x4's or 2x6's. Thanks for your help.