If your boat smells, it's almost always permeated sanitation hose. Cheap hose lets odor through the wall after 3–5 years.
What to Check
1
Smell test the hose
Wipe a damp cloth on the sanitation hose and smell it. If it stinks, the hose is permeated.
2
Check vent filter
Holding tank vent filter prevents tank odors from venting outside the hull.
3
Check Y-valve and pump
Failing valves leak waste into the bilge — obvious, awful smell.
When to Call Us
We replace permeated hose with proper Trident or Sealand sanitation hose, install vent filters, and rebuild the system. The smell goes away permanently.