I have never smelled any Methane or sewer gases coming from either the one on our farm which is on a septic tank or
the house here that is on city sewer.I still prefer the old types that used water though. We have a old Toilet that
has the hole backwards than what you normally see and it works great but, would when it uses 10 gallons a flush.
I have only seen one other to look like that one that is up there at the farm with that backwards hole ever.I don't know who
made it though but I know its over 40 years old but they work great. Sorry about my link, You tube is been on the fritz
for me.
the house here that is on city sewer.I still prefer the old types that used water though. We have a old Toilet that
has the hole backwards than what you normally see and it works great but, would when it uses 10 gallons a flush.
I have only seen one other to look like that one that is up there at the farm with that backwards hole ever.I don't know who
made it though but I know its over 40 years old but they work great. Sorry about my link, You tube is been on the fritz
for me.