Reply
 
Thread Tools Display Modes
 
Old 10-17-2017, 07:52 PM   #1
Senior Member
 
Bigfish's Avatar
 
City: Salem, Oregon
Country: USA
Vessel Name: My Lady
Vessel Model: Formosa 42 Double Cabin
Join Date: Jan 2013
Posts: 148
New Holding Tank Fittings?

I finally got my stainless steel holding tank out with a come along. I have a new custom made plastic tank that I need to put fittings on. Has anyone done this? I ordered the new tank with no fittings because I didnt know where they needed to be until I got the old one out. How do they put these fittings in at rhe factory? Can I do this myself? How do I get flanges inside?? I found a "relocation," diy kit that includes a big port that I assume is to allow you to get the flanges inside and it's got a big o ring to seal it back up. Anybody ever use one of these kits? How do they do it at the factory??
__________________
Advertisement

Bigfish is offline   Reply With Quote
Old 10-17-2017, 08:07 PM   #2
Veteran Member
 
MYMT's Avatar
 
City: Stuart
Country: USA
Vessel Name: Caretta
Vessel Model: Marine Trader Sedan
Join Date: Apr 2012
Posts: 86
Had mine made. Different ways to do it. Does it have baffles inside? Suggestion is to put all fittings on the top so that you donít have the worries of fittings leaking. And at least an inch diameter vent (2 would be better) you and those next to you will appreciate it in the future.
__________________

MYMT is offline   Reply With Quote
Old 10-17-2017, 08:10 PM   #3
Senior Member
 
Bigfish's Avatar
 
City: Salem, Oregon
Country: USA
Vessel Name: My Lady
Vessel Model: Formosa 42 Double Cabin
Join Date: Jan 2013
Posts: 148
Any idea how I install fittings?
Bigfish is offline   Reply With Quote
Old 10-17-2017, 08:13 PM   #4
Guru
 
City: North Charleston, SC
Country: USA
Join Date: Sep 2010
Posts: 4,390
Quote:
Originally Posted by Bigfish View Post
Any idea how I install fittings?
Buy the kit. I would expect it to have instructions. If not, it should be obvious.
rwidman is offline   Reply With Quote
Old 10-17-2017, 08:15 PM   #5
Guru
 
City: North Charleston, SC
Country: USA
Join Date: Sep 2010
Posts: 4,390
Quote:
Originally Posted by MYMT View Post
Had mine made. Different ways to do it. Does it have baffles inside? Suggestion is to put all fittings on the top so that you donít have the worries of fittings leaking. .......
If you put the outlet on the top it will suck air. The outlet has to be on the bottom or on a side as close to the bottom as possible. The inlet and the vent should be on or near the top.
rwidman is offline   Reply With Quote
Old 10-17-2017, 08:20 PM   #6
Guru
 
HopCar's Avatar


 
City: Miami Florida
Vessel Name: Possum
Vessel Model: Ellis 28
Join Date: Aug 2011
Posts: 3,446
There are a couple of different types of tank fittings that are do it yourself. Post a picture of the fitting and maybe someone here can help. You also might call who ever you bought the fittings from and ask them.

I have always bought tanks from Ronco Plastics and had them install the fittings. I think they spin weld the fittings onto the tank.
__________________
Parks Masterson
www.hopkins-carter.com
HopCar is offline   Reply With Quote
Old 10-17-2017, 08:29 PM   #7
Veteran Member
 
MYMT's Avatar
 
City: Stuart
Country: USA
Vessel Name: Caretta
Vessel Model: Marine Trader Sedan
Join Date: Apr 2012
Posts: 86
I really donít. I know they used pvc fittings and pipe to go from the topside to the bottom of the tank where I had them cut the bottom of the pipe at an angle so that if the pipe became dislodged it wouldnít fall over and at the same time wouldnít lay flat on the bottom unable to suck the contents out. One for Pumpout and one for overboard discharge. I do remember them having to reduce the pipes outside diameter a bit to be able to fit it into the factory fittings. Inch and a half on the discharge hose side, Iím thinking it may have been inch pipe inside to fit. Not sure, but Iíll bet Home Depot would have the fittings youíd need.
Iíll be back there in about a month or so, give you a hand with it if need be. Glad you survived the storm.
MYMT is offline   Reply With Quote
Old 10-17-2017, 08:29 PM   #8
Guru
 
HopCar's Avatar


 
City: Miami Florida
Vessel Name: Possum
Vessel Model: Ellis 28
Join Date: Aug 2011
Posts: 3,446
Are they Uniseal fittings? I think Peggie Hall favors Uniseal fittings.
Here is a video on how to install them.
__________________
Parks Masterson
www.hopkins-carter.com
HopCar is offline   Reply With Quote
Old 10-17-2017, 08:31 PM   #9
Veteran Member
 
MYMT's Avatar
 
City: Stuart
Country: USA
Vessel Name: Caretta
Vessel Model: Marine Trader Sedan
Join Date: Apr 2012
Posts: 86
They used PVC glue adhesive to put the fittings together.
MYMT is offline   Reply With Quote
Old 10-17-2017, 08:36 PM   #10
Senior Member
 
Bigfish's Avatar
 
City: Salem, Oregon
Country: USA
Vessel Name: My Lady
Vessel Model: Formosa 42 Double Cabin
Join Date: Jan 2013
Posts: 148
Thanks folks.. No video showed up but I'll track it down! I have not bought the fittings yet. Peggy Hall! Thanks for reminding me. She will know the best way to proceed!!
Bigfish is offline   Reply With Quote
Old 10-17-2017, 10:01 PM   #11
Guru
 
HeadMistress's Avatar


 
City: AR
Country: USA
Join Date: Jul 2009
Posts: 1,179
Quote:
Originally Posted by Bigfish View Post
Thanks folks.. No video showed up but I'll track it down! I have not bought the fittings yet. Peggy Hall! Thanks for reminding me. She will know the best way to proceed!!
Yup...we need to talk to figure out where the fittings CAN go and how to do it. So send me a PM that includes your email address and we'll go from there.

Meanwhile, here's the link to the Uniseal that includes instructions so you can get an idea of what it is and how it works: UNISEAL

Peggie
"If you can't explain it to a six year old, you don't completely understand it yourself." --Albert Einstein
__________________
© 2017 Peggie Hall
Specializing in marine sanitation since '87.
Author "The NEW Get Rid of Boat Odors"
HeadMistress is online now   Reply With Quote
Old 10-17-2017, 10:18 PM   #12
Senior Member
 
Bigfish's Avatar
 
City: Salem, Oregon
Country: USA
Vessel Name: My Lady
Vessel Model: Formosa 42 Double Cabin
Join Date: Jan 2013
Posts: 148
Thanks! Sent you a message
Bigfish is offline   Reply With Quote
Old 10-17-2017, 10:36 PM   #13
Guru
 
HopCar's Avatar


 
City: Miami Florida
Vessel Name: Possum
Vessel Model: Ellis 28
Join Date: Aug 2011
Posts: 3,446
For the smaller hose connections you might want to use a "spud" or "blind bulkhead fitting".
Like the Uniseal they allow you to attach fittings to the tank without access to the inside of the tank. These are threaded so it's easy to attach hose barbs to them. I haven't seen them big enough for the 1-1/2 hose you'll use for the pump out, but for 1" (vent?) or smaller lines they should work well. USI-RV Bulkhead Blind Tank Fittings
__________________
Parks Masterson
www.hopkins-carter.com
HopCar is offline   Reply With Quote
Old 10-17-2017, 10:38 PM   #14
Senior Member
 
Bigfish's Avatar
 
City: Salem, Oregon
Country: USA
Vessel Name: My Lady
Vessel Model: Formosa 42 Double Cabin
Join Date: Jan 2013
Posts: 148
Spendy!
Bigfish is offline   Reply With Quote
Old 10-17-2017, 11:02 PM   #15
Guru
 
HeadMistress's Avatar


 
City: AR
Country: USA
Join Date: Jul 2009
Posts: 1,179
Quote:
Originally Posted by Bigfish View Post
Thanks! Sent you a message
Just replied to your email.

Parks, not only is that thing VERY "spendy," but it appears in the illustration that part of it is metal, which isn't the best thing to use in a waste tank. Interesting though.

Peggie
"If you can't explain it to a six year old, you don't completely understand it yourself." --Albert Einstein
__________________
© 2017 Peggie Hall
Specializing in marine sanitation since '87.
Author "The NEW Get Rid of Boat Odors"
HeadMistress is online now   Reply With Quote
Old 10-17-2017, 11:03 PM   #16
Guru
 
LarryM's Avatar
 
City: League City, TX
Country: USA
Vessel Name: Pelago
Vessel Model: Wellcraft 3300 Coastal
Join Date: Aug 2011
Posts: 831
Quote:
Originally Posted by WesK View Post
If you put the outlet on the top it will suck air. The outlet has to be on the bottom or on a side as close to the bottom as possible. The inlet and the vent should be on or near the top.
Use a tank dip tube mounted in the top of the tank. This way, there is no standing waste in the head discharge lines to eventually permeate and stink, and in the event they become clogged, they can be withdrawn and cleared easily with minimal mess. All of the majors make these kits. No leaking fittings on the sides or bottom of the holding tanks.

__________________
Larry
M/V Pelago
LarryM is online now   Reply With Quote
Old 10-17-2017, 11:10 PM   #17
Guru
 
HeadMistress's Avatar


 
City: AR
Country: USA
Join Date: Jul 2009
Posts: 1,179
The "sealing grommet" in those kits are Uniseals. Easy to DIY fabricate for considerably less than the kits...the SeaLand version has a list price of about $50!
__________________
© 2017 Peggie Hall
Specializing in marine sanitation since '87.
Author "The NEW Get Rid of Boat Odors"
HeadMistress is online now   Reply With Quote
Old 10-17-2017, 11:47 PM   #18
Guru
 
HopCar's Avatar


 
City: Miami Florida
Vessel Name: Possum
Vessel Model: Ellis 28
Join Date: Aug 2011
Posts: 3,446
Quote:
Originally Posted by HeadMistress View Post
Just replied to your email.

Parks, not only is that thing VERY "spendy," but it appears in the illustration that part of it is metal, which isn't the best thing to use in a waste tank. Interesting though.

Peggie
"If you can't explain it to a six year old, you don't completely understand it yourself." --Albert Einstein
Yup those are pricy. Call Mac at Raritan and ask him for a bowl spud. Same thing, 1" thread (I think, maybe 3/4), all plastic, and should be less than twenty bucks. You can get them from Groco too.
__________________
Parks Masterson
www.hopkins-carter.com
HopCar is offline   Reply With Quote
Old 10-18-2017, 05:40 AM   #19
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 16,422
Normally tank fittings are spun in place.

A hole is cut and the fitting is placed on the hole ans a good sized (2hp) router with a fitting simply spins the fitting till both the firring and tank melt a bit from the friction.

It is a no brainer (except for cutting the hole in the right location) and usually a new hire job after 5 min of instruction.

Many places use plastic tanks , if you don't have a big router , you can visit any tank fabricator and they can install the fittings , it takes longer to drill the hole than spin weld the fitting.
FF is offline   Reply With Quote
Old 10-18-2017, 07:48 AM   #20
Senior Member
 
Conall63's Avatar
 
City: Cape Coral, Florida
Country: USA
Vessel Name: Gra Go Deo
Vessel Model: Roberts TY 43
Join Date: Apr 2014
Posts: 191
Three fittings in top...vent, inlet, discharge. As others have said use a dip tube for discharge/suction out.

All my fittings on my tanks are 1.5"

Use grommets if you didn't get fittings welded into tank, or try to weld them in yourself as Fred described.

McMaster has a any size and style grommet you'll need, and their delivery is insanely fast.

Conall
__________________

Conall63 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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





All times are GMT -5. The time now is 10:48 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012