LPP Septic System Home › Forums › Archives › Old Bulletin Board Archives › LPP Septic System This topic has 0 replies, 1 voice, and was last updated 24 years, 10 months ago by Thor E. Eilertsen. Viewing 0 reply threads Author Posts 14 Jun 1999 at 11:28 am #282183 Thor E. Eilertsen Perk test indicates that lpp system is needed. What problems should I expect with installation and coct? Author Posts Viewing 0 reply threads The forum ‘Old Bulletin Board Archives’ is closed to new topics and replies.