hey guys, i’m a new member. i have a problem. noticed a couple months ago when we use the big garden tub in the master bath that i get a sewer smell in my basement. if i close the drain off some with a washrag where it will drain slowly, then we don’t get the smell. about a month ago we left the house one day and we’re gone about 6 hours. the toilet was running when we got back and the whole house reeked of septic that’s the only time it’s gotten upstairs. today we have gotten a whole lot of rain and i can smell a septic smell in the basement only. seems that when a whole lot of water is turned loose at one time that the septic smell shows up. don’t see any signs of any sewer leak in the basement. any idea what my problem is? Do I need to have my septic tank pumped? it’s never been pumped. or is it something else? thanks for the help.