Aft holding tank vent

I was referring to the Filter locations……

My 2002 406 Aft Cabin does not have filters on the vent lines from either holding tank. (Vac-u-flush toilets) I am adding home-made filters now filled with activated charcoal.

take a short hose and see if you can blow from the vent to the tank.. just to see if it is clear.. i tend to find dirt dobbers mud in my vents.. usually can just wash them out...

Vacu-flush toilets do have filters, unless someone cut it out. You might want to look again. In any case the idea of making your own filter is a good one. I just saw something on it. Very simple and costs about $5 instead of $80

sorry but all vacuflush's do not have filters mine have not been cut out and 3 of my friends at my marina purchased their boats brand new from carver and none of theirs have any holding tank filters either

News to me. Thanks for the education. I'll have to check further.

No, mine do not have filters. Absolutely certain. I have followed both vents from the tank to the external through hull vents. No filter. Never was a filter. Maybe they should have had filters but they do not. You cannot make absolute statements like you did, because each boat build is different. But that is changing as I am installing filters tomorrow.

It must smell LOVELY for about 100' around your boat when someone flushes one of the vaccuflush toilets.

Maybe that's why we don't have any boating friends anymore!!! I think the new filters I am installing will help. Our boat is "A Pretty Penny". Occasionally it is called "A Poopy Penny".

Head Flushing Waste

I have a 1991 3607 aft cabin and still don't quite understand the Crown Electric head operations. I am good with replacing the pumps to flush the bowl but the actual flushing of the waste out of the bowl to the holding tank is inconsistent. Is it possible I have a clogged vent line on the holding tank or what might be the problem. If someone could explain the actual operation and why it might be slow draining to the holding tank. There are macerators for both heads and holding tanks which I assume are only to be used when outside coastline limits as required by the Coast Guard. I do have the Y valved locked to discharged the heads to the tanks, so I am legal there. Any help would be appreciated.

Thanks,

Actually no. A boat with sealand pumps NEEDS the vent filter.......I removed one once, and when you flushed the toilet, the pump pumps so much air and water into the tank at one time, that it literally cleared out the entire backyard at the house it was docked behind........REALLY BAD odor out of the vent.

I have an 89 3607 with no filters and no smell. I use one of the enzyme treatments instead of the chemical deodorizers and all is fine for the past 5 years. My dock neighbors have attested to the fact that my boat does not flush any odor. The filters in my opinion are nothing but a maintenance nightmare. We have a built in pumpout system in our docks which pumps out my boat just fine and at the same time adjacent boats have a hard time pumping because of inline filters not allowing sufficient air back into the tank. Remove the filters and use the enzyme treatment and your world will smell like roses, or maybe daisies. Also check your vent line to make sure it runs uphill from the tank to the truhull., a little dip acts just like a trap in a sink.

Hi Sea Ya. After a significant investigation, we have just discovered one of our odour filters is failing the visitor’s head and after another significant amount of time to attempt to remove it, it will not come out. Clearly the cabinetry surrounding the filter was installed post filter install. Arrrrgh. My suggestion to the plumber to install another odour filter above it was considered a fair solution, but finding one around the Whitsundays is not an easy task. Hence, my response to your reply. I can obtain enzyme solutions to apply to the holding tank, however, my question is more along the lines of how frequent do you need to add the solution and how much do you use (assuming there is a ratio to tank size)? We are about to have visitors onboard for at least 10 days and do not want to have a smelly experience.
Yours in odour,
Illerom.