Sewage gases from toilets post shtf

[Highlander]

We have an old fashioned brick built septic tank, better we think than the new fibre glass bulb type, and our systems lifetime is 30 years,... but in theory these tanks should be able to go on indefinitely, providing they are looked after, i.e. as Bortblanc says, easy on the chemicals

---

I have never heard of anyone emptying and replacing a whole tank though, our tank is the one they built with the house