Okay, this was unexpected. We took our Hunter for a shake down cruise and found that after hardly using the head (unless on the hook or middle of night and no facilities avail) the tank is filling far quicker than we expected :cussing:. Is this normal? We have a jabsco manual pump head. We had just had the tank pumped shortly before departure and about 3 days in (after some fairly rough weather) it was nearly full again! What gives? We have a macerator, but haven't used it and the seacock for it is closed. Apologies if this is a duplicate post. We just pumped out day before yesterday, spent one night on the hook, and now it's already half full. The access cap is taped off to seal from water intrusion since we went through some rain...thinking perhaps the seal was leaking. Ideas welcome. Thanks in advance.