Bad threads on the water tank. Ideas? - Fiberglass RV


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 04-22-2012, 11:53 AM   #1
Raz
Senior Member
 
Raz's Avatar
 
Name: Raz
Trailer: Trillium 2010
Vermont
Posts: 4,062
Bad threads on the water tank. Ideas?

The water tank in our Trillium sits in a molded well beneath the rear dinette. The drain pipe exits the drivers side of the well to a valve behind the rear tire. There is a 1/4" tee in this line that feeds the water pump. Very close quarters to say the least. The tank has always drained slow and never drains completely since the bottom of the tank is lower than the drain valve. Also there is always some wetness under the tank. I attributed this to sweating
Attached Thumbnails
P4170663.jpg   P4170664.jpg  

P4010663.jpg   P5150620.jpg  

__________________

__________________
Raz is offline   Reply With Quote
Old 04-22-2012, 11:55 AM   #2
Raz
Senior Member
 
Raz's Avatar
 
Name: Raz
Trailer: Trillium 2010
Vermont
Posts: 4,062
The tank hole is 1/2" mpt, so I took the whole thing apart and replumbed with 1/2" tubing and raised the tank up so it will better drain. Unfortunately the threads on the hole are worn, apparently from the tank moving around, and will no longer seal tight. The wetness I thought was sweating must have been a slow leak.

There is no access to the inside of the tank and that hole is the only one that can be used. I am thinking of epoxying the fitting into the hole but thought I would see if any one has a better idea. Raz
Attached Thumbnails
P4220648.jpg   P4170667.jpg  

P4170669.jpg  
__________________

__________________
Raz is offline   Reply With Quote
Old 04-22-2012, 12:00 PM   #3
Senior Member
 
Donna D.'s Avatar
 
Name: Donna D
Trailer: Escape 5.0 TA, 2014
Oregon
Posts: 24,433
Have you considered adding a deck plate to the top of the water tank? That would allow you to not only get all the water out, but thoroughly clean the inside as well.

Inspection plate installed in water tank

Deck Plate
__________________
Donna D.
Ten Forward - 2014 Escape 5.0 TA
Double Yolk - 1988 16' Scamp Deluxe
Donna D. is offline   Reply With Quote
Old 04-22-2012, 12:17 PM   #4
Senior Member
 
Thomas G.'s Avatar
 
Name: Kinga DeRode
Trailer: For Sale Or Rent
Rooms to Let 50 Cents
Posts: 5,103
Quote:
Originally Posted by Donna D. View Post
Have you considered adding a deck plate to the top of the water tank? That would allow you to not only get all the water out, but thoroughly clean the inside as well.

Inspection plate installed in water tank

Deck Plate
It would also allow you to use a fitting with a nut on it on the inside to get a clamping seal as opposed to a thread seal.

I like your idea of raising the tank with foam insulation - I have the same issue.
__________________
UHaul and Burro owners, join the UHaul Campers on Facebook. https://www.facebook.com/groups/529276933859491/
Thomas G. is offline   Reply With Quote
Old 04-22-2012, 12:21 PM   #5
Raz
Senior Member
 
Raz's Avatar
 
Name: Raz
Trailer: Trillium 2010
Vermont
Posts: 4,062
The deck plate is the solution of last resort. Thanks
__________________
Raz is offline   Reply With Quote
Old 04-22-2012, 12:30 PM   #6
Senior Member
 
Thomas G.'s Avatar
 
Name: Kinga DeRode
Trailer: For Sale Or Rent
Rooms to Let 50 Cents
Posts: 5,103
Quote:
Originally Posted by P. Raz View Post
The deck plate is the solution of last resort. Thanks
I'd be tempted to use lots of Teflon pipe tape and put a pig tail in the line so the hose flexes instead of stressing the fitting in the tank when movement occurs.
__________________
UHaul and Burro owners, join the UHaul Campers on Facebook. https://www.facebook.com/groups/529276933859491/
Thomas G. is offline   Reply With Quote
Old 04-22-2012, 01:12 PM   #7
Raz
Senior Member
 
Raz's Avatar
 
Name: Raz
Trailer: Trillium 2010
Vermont
Posts: 4,062
Quote:
Originally Posted by Thomas G. View Post
I'd be tempted to use lots of Teflon pipe tape and put a pig tail in the line so the hose flexes instead of stressing the fitting in the tank when movement occurs.
I tried extra Teflon tape. The threads are too weak. The tank movement coupled with the stiff PEX tubing has really done a job on the threads. Right now I am thinking JB weld to make the fitting and the tank one and replace the PEX tubing with vinyl. Keep the ideas coming. Raz
__________________
Raz is offline   Reply With Quote
Old 04-22-2012, 02:15 PM   #8
Senior Member
 
Thomas G.'s Avatar
 
Name: Kinga DeRode
Trailer: For Sale Or Rent
Rooms to Let 50 Cents
Posts: 5,103
A two part epoxy like JB Weld might work. Would it help to put a stainless steel hose clamp around the outside of the protrusion of the tank? If you heated it and tightened the clamp at the same time you might be able to get it to get a better grip on the inner fitting.
__________________
UHaul and Burro owners, join the UHaul Campers on Facebook. https://www.facebook.com/groups/529276933859491/
Thomas G. is offline   Reply With Quote
Old 04-22-2012, 02:29 PM   #9
Senior Member
 
Name: Darwin
Trailer: 2002 19 ft Scamp 19 ft 5th Wheel
Posts: 3,029
Send a message via Yahoo to Darwin Maring
Plumbers Goop?
__________________
Darwin Maring is offline   Reply With Quote
Old 04-22-2012, 02:46 PM   #10
Senior Member
 
Thomas G.'s Avatar
 
Name: Kinga DeRode
Trailer: For Sale Or Rent
Rooms to Let 50 Cents
Posts: 5,103
Quote:
Originally Posted by Darwin Maring View Post
Plumbers Goop?
Not a bad idea. This stuff is more flexible than epoxy when it has cured.
__________________
UHaul and Burro owners, join the UHaul Campers on Facebook. https://www.facebook.com/groups/529276933859491/
Thomas G. is offline   Reply With Quote
Old 04-22-2012, 05:17 PM   #11
Senior Member
 
Name: Darwin
Trailer: 2002 19 ft Scamp 19 ft 5th Wheel
Posts: 3,029
Send a message via Yahoo to Darwin Maring
It appears to me that any tube of the goop will work. I think they are all the same formula and they just package it with different names just to sell the stuff. Shoe goop in the shoe department, plumbers, campers and so forth in the other departments. I always keep a tube around. It takes at least a day to set up and then cures for an even longer time and really holds. Because it's on your water supply I would be careful of toxic chemicals other adhesives may have.
__________________
Darwin Maring is offline   Reply With Quote
Old 04-22-2012, 05:24 PM   #12
Senior Member
 
floyd's Avatar
 
Name: Floyd
Trailer: 2004 13 ft Scamp Custom Deluxe
IllAnnoy
Posts: 6,046
Registry
What's the tank made of?
I.E. If it's PVC then you could simply glue in a PVC fitting after drilling out the threads. That fitting could have internal threads into which you could attach the drain line. If ABS then of course....
__________________
floyd is offline   Reply With Quote
Old 04-22-2012, 05:29 PM   #13
Senior Member
 
Mouse's Avatar
 
Name: Brooke
Trailer: U Haul CT13
California
Posts: 292
What I did is choose a bigger threaded pipe and force it in the hole and having it cut new threads.
__________________
Mouse is offline   Reply With Quote
Old 04-22-2012, 05:36 PM   #14
Senior Member
 
Trailer: 2007 Eggcamper
Posts: 155
Raz,

I would try some GRIP (same as gasket cement used on cars). Than a stainless steel hose clamp as Tom had said. I would NOT try epoxy or pvc cement unless you know what the tank is made of (it might melt the tank if not compatable).

Art
__________________

__________________
artspe is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
17" Boler Trailer - Waste Water - Black Water Tank waroibns Plumbing | Systems and Fixtures 6 05-20-2011 09:19 AM
Auxiliary Fresh Water Tank, Transferring Water Adrian W General Chat 0 09-05-2010 03:36 PM
Water supply hose to the holding tank - grey water Kathy L Problem Solving | Owners Helping Owners 2 08-26-2009 05:52 PM
Water Tank fill valve from City water line! Michael Pupeza Problem Solving | Owners Helping Owners 6 06-20-2008 05:10 PM
Larger Fresh water Tank Ideas Steve Rosenberg Plumbing | Systems and Fixtures 8 12-15-2007 07:36 AM

» Upcoming Events
No events scheduled in
the next 465 days.
» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 12:19 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.