Due to some shoddy work from a previous owner I now find my water tank has a couple of small holes in it. They were caused by the tank shifting and coming in contact with a couple of sheet metal screws. The holes are located in the corner transition of the tank from the bottom to the side of the tank. Can I fix these by heating the surrounding area with something like a soldering iron to melt the holes closed or do I need to do something else? Like I said, they are small holes the size of a sheet metal screw. Once the holes are fixed I plan to do something to keep the tank from moving around so the problem doesn't happen again. Right now, it is just sitting on a piece of plywood between the frame and crosspieces. Thanks in advance for any help.

JB weld makes an adhesive for water, I would try that first. I never had much luck or skill with melting material and filling holes. Shoe Goo is another glue that bonds well to most materials. I would sand and solvent wipe the area to be bonded first. As a last resort I would use a screw with a small o ring under the head an screw it into the hole.

eternabond tape SealOr a plastic welder

How about 3M 5200, cures under water and is practically indestructible.

Depends on which water tank. Is it the fresh water, grey water or black water tank?The grey and black tanks are probably ABS and you need to use an ABS cement for that. JB Weld, mentioned earlier, makes an ABS cement. Lowes has Oatey ABS cement, 8 oz can for under $5.50. Both will do a permanent weld on ABS by softening the ABS and welding it together. If done carefully you well never see the "patch". Been there, done that.

Water Tank Repair | Good Sam Community

Gjac
Explorer III
Oct 20, 2015
JB weld makes an adhesive for water, I would try that first. I never had much luck or skill with melting material and filling holes. Shoe Goo is another glue that bonds well to most materials. I would sand and solvent wipe the area to be bonded first. As a last resort I would use a screw with a small o ring under the head an screw it into the hole.
gbopp
Explorer
Oct 20, 2015
JB Weld.
gatorcq
Explorer
Oct 20, 2015
eternabond tape Seal
Or a plastic welder
jalichty
Explorer
Oct 20, 2015
How about 3M 5200, cures under water and is practically indestructible.
Gene_Ginny
Explorer
Oct 21, 2015
Depends on which water tank. Is it the fresh water, grey water or black water tank?

The grey and black tanks are probably ABS and you need to use an ABS cement for that. JB Weld, mentioned earlier, makes an ABS cement. Lowes has Oatey ABS cement, 8 oz can for under $5.50. Both will do a permanent weld on ABS by softening the ABS and welding it together. If done carefully you well never see the "patch". Been there, done that.
time2roll
Nomad
Oct 21, 2015
Black ABS - PlastiMend
White polyethylene - probably needs to be welded.
Memphisdoug
Explorer
Oct 21, 2015
This is my white fresh water tank
TUCQUALA
Explorer
Oct 21, 2015
Had a crack in corner of fresh tank on a new Jayco, fixed myself by using a soldering gun with the flat, round tip which can be used for plastics. No more leaks in 5 yrs with trailer. AND, didn't have to leave for weeks at dealership and fight with the mfgr.
Memphisdoug
Explorer
Oct 21, 2015
TUCQUALA wrote:
Had a crack in corner of fresh tank on a new Jayco, fixed myself by using a soldering gun with the flat, round tip which can be used for plastics. No more leaks in 5 yrs with trailer. AND, didn't have to leave for weeks at dealership and fight with the mfgr.

I've got one of those. I'll give it a try. The holes are small. It shouldn't be a big deal to seal them up.
ledcomp
Explorer
Oct 21, 2015
My fresh tank had spun plugs that were leaking. I used Water Weld made by JB Weld. this stuff is safe for fresh water tanks. I have had it on there for 3 years now and no problems.

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