how to open water tank inspection port - SailNet Community
Reply
 
LinkBack Thread Tools
post #1 of 20 Old 10-24-2010 Thread Starter
Senior Member
 
Join Date: Jan 2010
Location: Boston, MA
Posts: 525
Thanks: 2
Thanked 1 Time in 1 Post
Rep Power: 7
 
how to open water tank inspection port

I need to open up my water tank and see how bad it is, maybe clean it, and then shock treat it. I can't figure out how to open it up though. The tank is FRP, molded into the bilge. The "inspection port", if that is the right term, is a circular plate of metal (I think bronze) about 7" in diameter. There is a ring, also of the same metal, with screws regularly spaced around it, that goes around the plate. This ring appears to be sealed to the FRP of the tank (I can see something that looks a bit like butyl tape squeezing out of the seam). I don't think unscrewing these screws is the correct way to open it, but I could be wrong. There is no sign that the plate is intended to be rotated to open; it doesn't have the two shallow holes like for a deck fitting key. Also, all the hoses for the tank run through fittings screwed into tapped holes in this plate (the fill hose, 2 pressure water hoses, and the Tank Tender hose), so I don't think I can rotate it without removing those fittings/hoses. The fuel tank on my boat is set up exactly the same way, if that helps any. What is this thing called, and how do I open it? I can't find pictures online, and I don't have a camera, btw

1979 Gulfstar 37 Laissez Faire
rmeador is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 20 Old 10-24-2010
Just another Moderator
 
Faster's Avatar
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 17,417
Thanks: 119
Thanked 385 Times in 365 Posts
Rep Power: 10
     
Can you post a picture?

Except for the fittings described I'd be leaning towards a 'snap-in' type of plate, in which case there would be at least one indentation around the perimeter of the plate to use a tool to pry it up...

If it is threaded perhaps the intention was to remove the hoses and use the fitting to apply torque to unscrew it.

Ron

1984 Fast/Nicholson 345 "FastForward"

".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
Faster is offline  
Quote Quick Reply Share with Facebook
post #3 of 20 Old 10-24-2010 Thread Starter
Senior Member
 
Join Date: Jan 2010
Location: Boston, MA
Posts: 525
Thanks: 2
Thanked 1 Time in 1 Post
Rep Power: 7
 
I'm sorry, I don't have a camera. I really need to buy a new one (last one lost overboard), but I haven't had time. The idea of unscrewing it using the fittings to apply torque is an interesting one. I think I might give that a try, as it doesn't seem too hard to undo the hoses. I'm not sure if I could get it back together correctly though. I'm still hoping someone will come along that recognizes this from my description.

1979 Gulfstar 37 Laissez Faire
rmeador is offline  
Quote Quick Reply Share with Facebook
post #4 of 20 Old 10-25-2010
Senior Member
 
QuickMick's Avatar
 
Join Date: Oct 2009
Location: California
Posts: 1,381
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 7
 
i believe i have something similar, i will take pics tonight and post manana~if they are the same you might get a little more help.

How inappropriate to call this planet Earth when it is quite clearly Ocean ~ Arthur C. Clarke

Quinn McColly
Macgregor Venture
QuickMick is offline  
Quote Quick Reply Share with Facebook
post #5 of 20 Old 10-25-2010
Senior Member
 
mitiempo's Avatar
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,662
Thanks: 0
Thanked 102 Times in 93 Posts
Rep Power: 9
   
I'd remove the screws.

Brian
Living aboard in Victoria Harbour
mitiempo is offline  
Quote Quick Reply Share with Facebook
post #6 of 20 Old 10-26-2010 Thread Starter
Senior Member
 
Join Date: Jan 2010
Location: Boston, MA
Posts: 525
Thanks: 2
Thanked 1 Time in 1 Post
Rep Power: 7
 
QuickMick, I don't mean to bother you, but did you happen to get those pics? I still haven't figured this out. mitiempo, I tried to remove the screws last night with a hand screw driver and they wouldn't budge. I'd rather not try power tools until I know for sure that's the right way.

1979 Gulfstar 37 Laissez Faire
rmeador is offline  
Quote Quick Reply Share with Facebook
post #7 of 20 Old 10-26-2010
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 16 Times in 13 Posts
Rep Power: 14
         
Ryan—

If you need to borrow an impact wrench to remove those screws, let me know. I've got a cordless Makita that is a gem.

Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply Share with Facebook
post #8 of 20 Old 10-26-2010 Thread Starter
Senior Member
 
Join Date: Jan 2010
Location: Boston, MA
Posts: 525
Thanks: 2
Thanked 1 Time in 1 Post
Rep Power: 7
 
Thanks Dan, I'll keep that in mind. Though I have been looking for an excuse to buy an impact driver. Would I want an impact driver or an impact wrench for this job? And do you think removing the screws is the way to go, or is there some better way to open it?

1979 Gulfstar 37 Laissez Faire

Last edited by rmeador; 10-26-2010 at 05:52 PM. Reason: spelling, of course
rmeador is offline  
Quote Quick Reply Share with Facebook
post #9 of 20 Old 10-26-2010
░░░░░░░░░░
 
hellosailor's Avatar
 
Join Date: Apr 2006
Posts: 11,807
Thanks: 6
Thanked 147 Times in 144 Posts
Rep Power: 11
   
rm-
Your best bet would be to post a picture, or find sistership owners. It *could* be that they used a fitting like a gas tank fitting, where there's an outer "ring" (think of a Ball canning jar, with just the ring, no lid dropped into it) that you rotate by hitting the tabs on it with a hammer. That's cheap and effective, and typically used to secure a flat "lid" with fittings in the center of it. Sound familiar?
Of course whatever they used may have just been for the convenience of the fittings, the rest may be glassed over, accidentally or intentionally, thinking no one will ever need to open it again.
For slotted screws that are stuck, I'd suggest going to Sears and getting an impact driver. Heavy tool steel, about 6" long and an inch thick, that takes hardened screwdriver (or socket) bits on one end. Twisty gizmo above that end. Then you hit the backside with a mallet, and while the "hit" forces the screwdriver bit into the slot (so it doesn't chew up the screw) the twisty bit rotates just a little, forcing the screw to unscrew.
A VERY useful tool for stuck screws and bolts of all kinds, not too expensive, usually under $20 from someplace that has a large tool inventory for mechanics and machinists. (Not Home Depot or Lowes. Sears and Harbor Fright both carry them, as do auto supply stores.)
hellosailor is offline  
Quote Quick Reply Share with Facebook
post #10 of 20 Old 10-26-2010
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 16 Times in 13 Posts
Rep Power: 14
         
The impact wrench is a lot easier to use and less likely to do damage than an impact driver.

Does your inspection plate look anything like this:


Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Installing inspection port, SS water tank moonie5961 Gear & Maintenance 2 06-09-2009 03:12 AM
FS: Tank inspection port PaulSears Gear & Maintenance 1 01-12-2009 09:09 AM
inspection port for fuel tank ambianceack Gear & Maintenance 3 01-11-2009 11:06 PM
Add Inspection Port to Existing Tank mlitzkow Gear & Maintenance 4 03-22-2008 04:06 AM
Fuel Tank Inspection Port MrBreeze Gear & Maintenance 0 04-24-2007 02:45 PM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome