Reply
 
Thread Tools Display Modes
 
Old 09-02-2016, 10:38 AM   #1
Veteran Member
 
Mach_cat's Avatar
 
City: Renton
Country: USA
Vessel Model: 1981 Hardin Sedan 42
Join Date: Sep 2014
Posts: 26
Adding inspection port to fiber glass tanks.

My new to me 81 Hardin has original Fiberglass tanks.
Would be nice to have a clean out and inspection port. Hoping someone on the site might have done this and can share how A person can do this?

Thanks Ed
__________________
Advertisement

Mach_cat is offline   Reply With Quote
Old 09-02-2016, 11:43 AM   #2
FOG
Senior Member
 
City: Wilmington, NC
Country: USA
Vessel Name: DreamQuest
Vessel Model: Prairie 36
Join Date: Jan 2016
Posts: 240
You can buy inspection plates plastic or metal and install them.

But if you want to make one yourself here are the basics on how I did it:

Cut a hole where you want the inspection port.
Glass a flange to the piece that was cut from the hole.
Once cured put the hole piece with the new flange back in the hole and drill holes for bolts around the flange.
Remove the hole piece and Epoxy stainless steel bolts from inside the tank with threads on the outside.
You now have a cover that you can remove and replace.
__________________

FOG is online now   Reply With Quote
Old 09-02-2016, 12:26 PM   #3
TF Site Team
 
Larry M's Avatar
 
City: JAX, FL
Country: USA
Vessel Name: Hobo
Vessel Model: Krogen 42-120
Join Date: Nov 2008
Posts: 4,649
Seabuilt makes access plates. Not cheap but well built and relatively easy to install.


Seabuilt - Access Plate Systems
Larry M is offline   Reply With Quote
Old 09-02-2016, 10:31 PM   #4
Veteran Member
 
Mach_cat's Avatar
 
City: Renton
Country: USA
Vessel Model: 1981 Hardin Sedan 42
Join Date: Sep 2014
Posts: 26
Inspection

Thanks Larry
I see you are at Friday Harbor. Do you also live on the island or just have your boat there? We will probably move the boat up there next summer. We have a second home over by Roche Harbor.
Ed
Mach_cat is offline   Reply With Quote
Old 09-03-2016, 08:07 AM   #5
TF Site Team
 
Larry M's Avatar
 
City: JAX, FL
Country: USA
Vessel Name: Hobo
Vessel Model: Krogen 42-120
Join Date: Nov 2008
Posts: 4,649
Ed: Hobo has been based in Florida for the last few years. We left FH a few weeks ago to head back to the heat.
Larry M is offline   Reply With Quote
Old 09-03-2016, 08:56 AM   #6
Veteran Member
 
Mach_cat's Avatar
 
City: Renton
Country: USA
Vessel Model: 1981 Hardin Sedan 42
Join Date: Sep 2014
Posts: 26
Larry,
Where do you stay when up in the the northwest?
Did you take hobo down though the Panama Canal from Friday harbor?..??

Ed
Mach_cat is offline   Reply With Quote
Old 09-03-2016, 09:07 AM   #7
TF Site Team
 
Larry M's Avatar
 
City: JAX, FL
Country: USA
Vessel Name: Hobo
Vessel Model: Krogen 42-120
Join Date: Nov 2008
Posts: 4,649
Quote:
Originally Posted by Mach_cat View Post
Larry,
Where do you stay when up in the the northwest?
Did you take hobo down though the Panama Canal from Friday harbor?..??

Ed
PM Sent
Larry M is offline   Reply With Quote
Old 09-03-2016, 02:03 PM   #8
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 14,915
GRP is almost always strong enough , but it takes thickness to be stiff enough.

I would glass on the outside of a GRP tank till it with the existing material was at least 1/2 or better 3/4 thick.

The tank wall flexing now is no problem, should it flex with the inspection port installed , you may get a leak.
FF is offline   Reply With Quote
Old 09-04-2016, 11:16 PM   #9
Senior Member
 
DHeckrotte's Avatar
 
City: Philadelphia, PA
Country: USA
Vessel Name: Revel
Vessel Model: 1984 Fu Hwa 39
Join Date: Nov 2015
Posts: 445
I added a clean out/inspection plate to our in-keel water tank on our 1970 LeComte Northeast 38 sailboat. The tank top is about 3/8" thick originally bolted to fiberglass of similar thickness forming the tank top. Good old early '60s practice! I screwed the tank top 'permanently' in place and added a Beckson PVC access port. I've used these ports on a 1968 Flying Dutchman sailboat as well. Screwed into the 3/8" tank top and bolted to the flexible 1/8" 'glass on the FD. Bedded in 5200.

These Beckson PVC ports come in several diameters; 4", 6", and 8", if I remember correctly. Pick what's suitable for your purpose.

Entirely satisfactory.
Attached Thumbnails
Click image for larger version

Name:	IMG_0101.jpg
Views:	12
Size:	146.7 KB
ID:	56047  
DHeckrotte is offline   Reply With Quote
Old 09-04-2016, 11:37 PM   #10
Senior Member
 
Brisyboy's Avatar
 
City: Brisbane
Country: Australia
Vessel Name: Malagari
Vessel Model: Island Gypsy 36 Europa
Join Date: Mar 2015
Posts: 132
Hey guys, you forgot one piece of critical advice - and that is..........................make sure the contents of the tank is BELOW where you want to cut the hole, BEFORE the first cut
__________________
George
Brisbane
IG 36 Europa
Brisyboy is offline   Reply With Quote
Old 09-05-2016, 01:10 AM   #11
Veteran Member
 
Mach_cat's Avatar
 
City: Renton
Country: USA
Vessel Model: 1981 Hardin Sedan 42
Join Date: Sep 2014
Posts: 26
Well I think empty is better. Do not want Fiberglass in the fuel!
Also want to clean the tank.
Mach_cat is offline   Reply With Quote
Old 09-05-2016, 02:29 AM   #12
Moderator Emeritus
 
BruceK's Avatar
 
Join Date: Oct 2011
Posts: 6,222
Quote:
Originally Posted by Brisyboy View Post
Hey guys, you forgot one piece of critical advice - and that is..........................make sure the contents of the tank is BELOW where you want to cut the hole, BEFORE the first cut
George, might you have learnt that sage advice by experience?
__________________
BruceK
Island Gypsy 36 Europa "Doriana"
Sydney Australia
BruceK is offline   Reply With Quote
Old 09-05-2016, 03:38 AM   #13
Senior Member
 
Brisyboy's Avatar
 
City: Brisbane
Country: Australia
Vessel Name: Malagari
Vessel Model: Island Gypsy 36 Europa
Join Date: Mar 2015
Posts: 132
Bruce............shame on you for even suggesting it.............luckily the answer is no.
__________________

__________________
George
Brisbane
IG 36 Europa
Brisyboy 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 12:52 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