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Topic starter
June 30, 2024 5:59 PM
So, I have a 2020 3991RD, the bathroom sink and shower both drain into the same grey tank. When the tank valve is closed, I take a shower and the sink will burp up water... It's like a vent is blocked?? And YES, the tank is EMPTY.. There is a screw on vent cap under the sink, would that be the one that needs to be replaced? It is stamper Sewer Vent
