Does your older Thetford 145/165 have an offensive odour? You can fix this with a few spare parts. Joe will show you how to replace the Vent Seal and Lip Seal. Whilst doing these repairs, he also replaced the Bellows Pump, which had a tiny leak. Our Thetford Porta Potti has had lots of use over a six year period, however it is still is very good condition, so we were loathe to simply place…