Someone more knowledgable please correct me, but I'm pretty sure you only need to pump the average household septic system every 3 years. Unless there isn't a drain field, then things would be different
https://fountain.fm/episode/GqpdOZGn4xuiSnIIJ6RZ
nostr:nevent1qvzqqqpxquqzpztegvtexrkvfq7v349zvwmq69tngesrsfgn6u6hdjzan75h7wahygy9wu