Cruisers Forum
 


Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 02-06-2019, 08:46   #1
Registered User

Join Date: Jan 2013
Location: Victoria BC
Boat: John Alden 36 foot cutter
Posts: 3
Fiberglass built in holding tank.

I plan to build a, large as possible holding tank : 46"x 16 x 12 approx. shaped to the sailboat hull under the V. It will pump out through the existing deck fitting and would like to be able to drain into the Ocean (as regulations allow)

I'm wondering if I can gravity drain, shaping the tank toward the drain and using a new electric toilet.
donmitchell is offline   Reply With Quote
Old 02-06-2019, 08:59   #2
cruiser

Join Date: Jan 2017
Boat: Retired from CF
Posts: 13,317
Re: Fiberglass built in holding tank.

You aware that will add 400+ lbs at that point when full?

Might affect sail performance. . .
john61ct is offline   Reply With Quote
Old 02-06-2019, 12:49   #3
Marine Service Provider
 
peghall's Avatar

Join Date: Feb 2011
Posts: 3,012
Re: Fiberglass built in holding tank.

To gravity discharge, the entire tank must be well above waterline...so I don't THINK a tank shaped to fit the hull under the v-berth will be able to do that. Nor do I think there's enough space under the v-berth for a tank that big...remember, you have to allow space for the fittings and hoses.

Plus, as John said, it would add a lot weight to that part of the boat--at least 300 lbs plus the weight of the tank...and a FG tank that size would be heavy!

You might want to consider a Plan B: A smaller plastic (rotomolded PE) tank. And your best source is Ronco Plastics Ronco Plastics marine Tanks They make TOP quality thick-walled water and waste tanks for a very reasonable price and have more than 400 shapes and sizes, over 100 of which are non-rectangular, and they install fittings in the sizes and locations specified by the customer when they make the tank.

However the toilet has nothing to do with emptying the tank..it only sends bowl contents TO the tank. So the type of toilet is immaterial as long as it's capable of getting the waste into the tank.

--Peggie
__________________
© 2024 Peggie Hall
Specializing in marine sanitation since '87.
Author "The NEW Get Rid of Boat Odors"
peghall is offline   Reply With Quote
Reply

Tags
fiberglass, holding tank

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Sanblasting inside built-in fiberglass tank? Disielcustoms Engines and Propulsion Systems 1 26-05-2019 23:27
Holding Tank Holding Tank Leaff Construction, Maintenance & Refit 17 01-07-2012 05:12
Inspection Plate in Fiberglass Holding Tank. Necessary? pressuredrop Construction, Maintenance & Refit 6 11-04-2011 15:24
Fiberglass Holding Tank ? pressuredrop Construction, Maintenance & Refit 13 15-11-2010 18:35

Advertise Here


All times are GMT -7. The time now is 12:19.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.