Welcome to Carver Yachts Owners Forum

We are a boating forum for owners of Carver Yachts to enthusiastically discuss all aspects of Carver Boat ownership. Whether you are looking for your first Carver or currently own one, you are sure to feel at home on CarverYachtOwners.com

You are currently viewing our board as a guest which gives you limited access to view most discussions, articles and access our other FREE features. By joining our free community you will have access to searching the forum topics, post topics, communicate privately with other members (PM), respond to polls, upload your own photos and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

Holding tank

Discussion of AC's, plumbing and sanitation related issues.
User avatar

Topic author United States of America
Roxanne
Scurvy Dog
Scurvy Dog
Posts: 23
Joined: June 8th, 2017, 9:08 pm
Vessel Info: 1999 Carver 356
Location: Oakwood GA
Has Liked: 11 times
Been Liked: 5 times

Holding tank

Postby Roxanne » June 8th, 2017, 11:40 pm

:banghead: my husband and I purchased a 1999 Carver 356. I feel like I'm pretty boat smart but this has me stumped. He is out of the country this summer and I decided to do some good spring cleaning. While cleaning the aft air conditioning ventsp I noticed the holding tank is full. Maybe 2 to 3 inches from the top. This explains A LOT since this is not our first Carver and our old Carver only had 1 tank that we didn't pump out more than about once a month. This boat is always full of Poo! I went back to the pump out station and pumped both tanks. I stopped several times to get the system to build up more suction but it seems like it is empty. When I go look however it is far from empty! I looked all through the mounds of paperwork that came in the Carver "suitcase" but all of the diagrams and schematics are on the 355 model and don't look anything like our layout. I was thinking of reasons this might happen and all I can come up with is thAt maybe the vent is blocked. Wouldn't the vent need to be open to suck out the poo? Doesn't air have to replace the contents? I looked for the air vent for the tank but I'm not sure which one it is? I tried to look for the air vent by following it from the tank but wow that space is small. The holding tank is literally an inch from the air return Everything else works fine with the sanatation system. Thanks for any thoughts. It's a gross thought to have so much crap in the boat that I can't get rid of!

User avatar

United States of America
mjk1040
Admiral
Admiral
Posts: 667
Joined: July 30th, 2015, 8:15 am
Vessel Info: 1998 355 AC/MY "Deja Vu"
Location: Savannah, NY
Has Liked: 2 times
Been Liked: 81 times

Re: Holding tank

Postby mjk1040 » June 9th, 2017, 6:13 am

Can u take the vent line off at the tank and blow air or water out of it. It appears the vent is on the port (left) side of the boat next to the floor drain behind the ice maker. I believe your theory of air in as contents out. I don't think you can run anything from the vent bank to the tank because they loop the hose at the vent outlet. Go to the Carver Yacht site, they have diagrams for the 1999 356 under owners section in parts. The 355 paperwork should match the 356, but even that sometimes is not exact. A bug may have plugged the vent. Good luck!
Mike :down:
I'd Rather Be Boating!
1989 Sea Ray Seville
1990's Thompson 22' Cuddy Cabin
1990's 4Winns 245 Vista Cruiser
1980's Thompson 19' Open Bow
User avatar

Canada
Viper
Admiral
Admiral
Posts: 1316
Joined: July 10th, 2015, 9:58 pm
Vessel Info: Carver 3807
Location: Canada
Has Liked: 45 times
Been Liked: 228 times

Re: Holding tank

Postby Viper » June 9th, 2017, 6:56 am

Welcome aboard. You've come to the right place for Carver help. I applaud you for tackling this yourself. :down:

A venting issue is a possibility. If you have an overboard discharge option, some are plumbed in a way that incorporates a 3-way valve in the output side of the tank. If this is the case with you and the valve is switched to the overboard side, you won't be able to pump it out through the deck fitting.

Have you confirmed there actually is waste in the tank and that you're not simply looking at a sludge build up on the tank walls?

Canada
bud37
CYO Supporter
CYO Supporter
Posts: 474
Joined: April 23rd, 2015, 10:22 pm
Vessel Info: 2001 350 Mariner
Has Liked: 89 times
Been Liked: 82 times

Re: Holding tank

Postby bud37 » June 9th, 2017, 7:27 am

To add to all of the above, another visual clue might be to look at the tank and see if there is any evidence of it being deformed ( as in sucked in a bit ).....this would tell me the vent was plugged or restricted......vacuum is quite powerful.
User avatar

Topic author United States of America
Roxanne
Scurvy Dog
Scurvy Dog
Posts: 23
Joined: June 8th, 2017, 9:08 pm
Vessel Info: 1999 Carver 356
Location: Oakwood GA
Has Liked: 11 times
Been Liked: 5 times

Re: Holding tank

Postby Roxanne » June 9th, 2017, 7:34 am

Thanks Mike! I have spent about 20 minutes looking for then vet on this tank. I looked up the makers of the holding tank and going off the diagram on their website I should be able to see it but I don't. I tried to unscrew the top of the bed frame thinking I would get a better view of the situation but that is not the case. I am not sure how they got all of this in this compartment but I am sure it was easier when they were assembling it than it is now! If I can't find the vent before my husband Mike gets home, do you think I can untwist the screw on top of the tank itself and try vacuuming it out again? At least I might be able to get it cleaned out? Thanks so much for your help. :blush:
User avatar

United States of America
Samuel
Scurvy Dog
Scurvy Dog
Posts: 5
Joined: June 9th, 2017, 7:41 am
Been Liked: 1 time

Re: Holding tank

Postby Samuel » June 9th, 2017, 7:51 am

User avatar

United States of America
Samuel
Scurvy Dog
Scurvy Dog
Posts: 5
Joined: June 9th, 2017, 7:41 am
Been Liked: 1 time

Re: Holding tank

Postby Samuel » June 9th, 2017, 7:58 am

You should have 2 tanks the one in the aft cabin is under the rug remove floor board. If it is dark it can be empty i put hot water in mine fill it up add blue chemical in it and take a ride. Then go empty tank.
User avatar

Topic author United States of America
Roxanne
Scurvy Dog
Scurvy Dog
Posts: 23
Joined: June 8th, 2017, 9:08 pm
Vessel Info: 1999 Carver 356
Location: Oakwood GA
Has Liked: 11 times
Been Liked: 5 times

Re: Holding tank

Postby Roxanne » June 9th, 2017, 8:10 am

The tank itself is a little swollen looking. It might be my imagination since I've figured out what is in it and how long it must have been in it. It does not appear to be concave however. Last Sunday before Mike left town we pumped out and he left the vacuum on a few seconds just to make sure nothing else was coming out. Twice there was a strange pop noise that neither of us could identify. I have never heard it before on this boat but now that we are talking about it maybe it was the tank trying to re-pressurize ?? Like if you suck the last of some Coke out of a bottle and you continue to suck the bottle shrinks in but when you release it it pops back out? Another thing, I read on someone else's thread that the vent on this tank is on the back, or where my head would be when sleeping on the bed. He had a reply that spoke of the tank leaking into the filter if the tank is more than 2/3 full and you take the boat out, when you reach plane the tank contents runs back through the air filter and clogs or blocks it? True? The manufacturer of the tank shows the air exhaust at the front but this boat is 17 years old. Maybe I'm looking in the wrong place.
You do not have the required permissions to view the files attached to this post.
User avatar

Topic author United States of America
Roxanne
Scurvy Dog
Scurvy Dog
Posts: 23
Joined: June 8th, 2017, 9:08 pm
Vessel Info: 1999 Carver 356
Location: Oakwood GA
Has Liked: 11 times
Been Liked: 5 times

Re: Holding tank

Postby Roxanne » June 9th, 2017, 8:18 am

Samuel, thanks. The front tank is fine. It empties out completely and it's what the girls and I are using now. As I was doing spring cleaning I decided to wax our new boat. Turns out she's not white at all. She's cream or off white. I'll be living here this summer finishing this project!! Before/after pic. I'm screwed. I should have left it oxidation white color LOL.
You do not have the required permissions to view the files attached to this post.
User avatar

Topic author United States of America
Roxanne
Scurvy Dog
Scurvy Dog
Posts: 23
Joined: June 8th, 2017, 9:08 pm
Vessel Info: 1999 Carver 356
Location: Oakwood GA
Has Liked: 11 times
Been Liked: 5 times

Re: Holding tank

Postby Roxanne » June 9th, 2017, 8:20 am

Ahhhhh
You do not have the required permissions to view the files attached to this post.

Return to “AC/Heat, Plumbing & Sanitation”



Who is online

Users browsing this forum: Samuel and 2 guests