Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 18-07-2008, 16:01   #16
Registered User

Join Date: Jan 2006
Location: North Carolina
Boat: 44 footer
Posts: 923
PVC pipe is an intriguing idea!

A whole lot easier to find places to slide in a few tubes, rather than tearing apart the whole boat to add a tank. A fair bit of wasted space though...
__________________

__________________
Zach is offline   Reply With Quote
Old 18-07-2008, 17:38   #17
Registered User
 
Delezynski's Avatar

Join Date: Feb 2008
Location: Aboard Guenevere
Boat: Nor'Sea 27, Guenevere
Posts: 227
Send a message via Skype™ to Delezynski
Hint....

If you make one, PVC or other stuff, put the "IN", "out" and "vent" on the TOP! That is how our tank is and makes for NO LEAKS!

Greg
__________________

__________________
Our boat is our bedroom, the world has become our living room.


Greg & Jill Delezynski
Cruising aboard Guenevere
Home Page:www.svguenevere.com
Delezynski is offline   Reply With Quote
Old 18-07-2008, 22:40   #18
Senior Cruiser
 
Lancerbye's Avatar

Cruisers Forum Supporter

Join Date: Mar 2007
Location: Ladysmith,BC, Vancouver Island , Canada
Boat: Lancer 44 Motorsailer
Posts: 1,758
Images: 32
the vent and the "in" are usually on top but the "out" will need an internal pipe going from the top to the bottom to be able to empty the tank.
__________________
The basis of accomplishment is in never quitting
Mengzi Meng-tse
Lancerbye is online now   Reply With Quote
Old 19-07-2008, 15:24   #19
Registered User

Join Date: Jan 2006
Location: North Carolina
Boat: 44 footer
Posts: 923
I'm a little intrigued by the pipes idea, and setting them up vertically... above the water line with a valve/T to the outlet sea cock. The ability to gravity drain overboard... (Could have other dangerous gravity related results... but the plumbing maze would be reduced by miles...)

A dip tube inside would still be required for vacuum pump outs...

Sitting vertically, the gap between the pipes would allow for the head to tank line to nest in between making for a more compact installation too. Only one Y-valve...
__________________
Zach is offline   Reply With Quote
Old 19-07-2008, 16:18   #20
Registered User

Join Date: Jan 2006
Location: North Carolina
Boat: 44 footer
Posts: 923
Found a slick idea... this system does away with the Y-valve, and has the ability to link multiple tanks with only one dip tube... and it gravity drains. Southwinds - August 2000

Pretty sure I'd put a valve at the tank though... grin. There are few things less fun to mop out of the bilge...

Edit: I guess using hoses and fittings larger in diameter than the outlet of the head might allieviate some concerns of clogs too, or at least make the clogs easier to find. (Grin) Either a built in restricted section, or large enough diameter...
__________________
Zach is offline   Reply With Quote
Old 19-07-2008, 17:00   #21
CF Adviser
Moderator Emeritus
 
Hud3's Avatar

Cruisers Forum Supporter

Join Date: Sep 2007
Location: Virginia
Boat: Island Packet 380, now sold
Posts: 8,929
Images: 49
A lot of cruisers I know have good things to say about Ronco plastic tanks. They make them in a lot of different shapes.

Marine Tanks - Ronco Plastics
__________________
Hud
Hud3 is offline   Reply With Quote
Old 29-07-2008, 05:16   #22
Registered User
 
bmartinsen's Avatar

Join Date: Dec 2007
Location: Grand Cayman
Boat: Lavranos 39 S/v Continental Drift
Posts: 88
I checked into the prices for 12 pvc. Wow. The pipe wasn't bad but the end caps range between $160- $460 each. So I'm back to looking at square tanks and think
I can use a Todd tank if I can turn it on it's side( verticle) so holes are on top and build a siphon to remove waste. I don't want to relocate hole for removal. Anyone
done this?
__________________
bmartinsen is offline   Reply With Quote
Old 29-07-2008, 05:33   #23
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,596
Images: 240
There should be no need to flip the holding tank on itís side.

Goto:
Appendix 3.0 - Sewage Holding Tanks (Voluntary) | TP 1332 | Marine Safety
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 29-07-2008, 16:59   #24
Registered User
 
bmartinsen's Avatar

Join Date: Dec 2007
Location: Grand Cayman
Boat: Lavranos 39 S/v Continental Drift
Posts: 88
Hi Gord
The space that I want to utilize is 20"wide x 16 deep x 30" high. Todd makes one like this but is designed to be 20 " L with the input, output and vents on the side.
1: doesn't fit this way.
2: can't put as much in
3: contents tend to plug vent easily when rocked or healed ( only have one hull. might be easier to add hull than holding tank

I thought if all holes where one top everything would be better.
I live on an island in the caribbean, nice but not enough boat stores.
Cheers
__________________
bmartinsen is offline   Reply With Quote
Old 29-07-2008, 17:08   #25
CF Adviser
Moderator Emeritus
 
Hud3's Avatar

Cruisers Forum Supporter

Join Date: Sep 2007
Location: Virginia
Boat: Island Packet 380, now sold
Posts: 8,929
Images: 49
Quote:
Originally Posted by bmartinsen View Post
... I live on an island in the caribbean, nice but not enough boat stores...
I know the feeling...
__________________
Hud
Hud3 is offline   Reply With Quote
Old 29-07-2008, 19:33   #26
Registered User

Join Date: Jan 2006
Location: North Carolina
Boat: 44 footer
Posts: 923
Bmartinsen:

Might want to call up the manufacturer and see if they'll do a one off for you. If the tank is rotomolded the holes and fittings are probably welded in after its molded. In any case they ought to be able to locate the fittings where you need them.

Zach
__________________
Zach is offline   Reply With Quote
Old 01-08-2008, 09:47   #27
Registered User
 
ausieman's Avatar

Join Date: Dec 2007
Location: Sydney Australia
Boat: Citation 34' Center Cockpit (Australian design and build)
Posts: 61
Images: 12
Just thinking out loud here but would it be possible to fiberglass the ends of pipes over and maybe incorporate some fittings into this whilst at it.
__________________
I used to be undecided but now I'm not so sure.
Beauty is in the eye of the beerholder!
ausieman is offline   Reply With Quote
Old 01-08-2008, 13:26   #28
Senior Cruiser
 
Lancerbye's Avatar

Cruisers Forum Supporter

Join Date: Mar 2007
Location: Ladysmith,BC, Vancouver Island , Canada
Boat: Lancer 44 Motorsailer
Posts: 1,758
Images: 32
FG does not adhere to PVC very well but one can weld PVC and sheet PVC is readily available at Industrial Plastics. You use PVC rod and a high heat gun with a concentrating tip.
__________________
The basis of accomplishment is in never quitting
Mengzi Meng-tse
Lancerbye is online now   Reply With Quote
Old 01-08-2008, 14:47   #29
Registered User

Join Date: Jan 2006
Location: North Carolina
Boat: 44 footer
Posts: 923
It is an interesting idea... Just use the PVC tube as a form and abandon it in place... a piece of polystyrene and carve it into a bowl... slap one on each end and glass the whole shooting match, drill a hole toss in some acetone and pour out the foam.
__________________
Zach is offline   Reply With Quote
Old 01-08-2008, 16:29   #30
Senior Cruiser
 
Roy M's Avatar

Cruisers Forum Supporter

Join Date: Feb 2007
Location: Southwestern Yacht Club, San Diego, CA
Boat: Searunner 40 trimaran, WILDERNESS
Posts: 3,042
Images: 4
Why not just build the whole tank out of plywood, coat it with epoxy, bolt the lid on (to allow access to the interior), and gain the advantage of more volume? All of this stuff about tubes just reduces the holding tank capacity, doesn't it? The tank in the picture fit into an unused space and provides about 20 gallons of storage. It is above waterline, so it can be discharged overboard without pumps, or alternatively removed via a deck mounted access for the sewage pump.
Attached Thumbnails
Click image for larger version

Name:	6-9-2008 8-47-13 AM_0001-reduced.jpg
Views:	101
Size:	142.5 KB
ID:	4514  
__________________

__________________
Roy M is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Pump up -gravity out holding tanks GMac Plumbing Systems and Fixtures 26 21-03-2009 18:16
Holding Tank Pumpout marc Plumbing Systems and Fixtures 16 19-07-2008 02:32
Privilege 39 holding tanks scotte Plumbing Systems and Fixtures 10 21-12-2007 04:15
holding tank requirement sundown Rules of the Road, Regulations & Red Tape 5 07-10-2007 14:26
CONNECTING FUEL/WATER,HOLDING TANKS wind rose ll Marine Electronics 2 14-06-2007 14:10



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 09:52.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.