Re: plumbing vent and hepvo
Yup, I'd have to agree with you. I'm in the process of installing my grey tank and the 5er I tore up for parts included a spring loaded one way valve (1 1/4" D) down stream of the P-trap on the kitchen sink. This will let the grey tank drain freely. But your post reminds me that I haven"t vented that particular grey tank. I vented the black tank and the shower grey tank (which empties via a pump to the main grey tank), but completely forgot the need to vent the main 40 gal grey tank. Since drainage won't be a problem I'll just thread a 1/2" fitting into my black water vent and use PVC from the main grey tank. Talk about perfect timing--thanks.