Repairing a water tank: why wouldn't this work?
- Thread starter Puggy
- Start date
coopec
N/A
Puggy
Well-Known Member
yes - very impressive stuff. I notice that they do show it being applied via a spray gun - which would mean less destruction of the tank to the get the stuff inside. I might see if I can get hold of some and find an old water tank somewhere and do some experimenting.
Also - thank you all for your contributions to my original post - much appreciated. I am sorry I was late in replying. thanks Coopec for nudging me. I still haven't worked out how to "follow" a particular thread.
At the moment I am still trying to diagnose whether it is my front, back or both tanks that are leaking. To this end, I mixed some red and green food dye and tipped it into the tanks. This wasn't very successful, as I waited a week and then inspected the bilge to find crystal clear fresh water! I then ran the tap from both tanks and both tanks ran clear and made lovely tea!
Two problems i think: 1. I need much more dye as it was obviously too dilute in 350l of water, so I have ordered industrial quantities off Amazon. 2. I wondered if the dye settles out in the tank so I am going to make some up and leave it in a clear container to see what happens.
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malindi
Well-Known Member
My water tanks had crevice corrosion alone the weld, I applied following cleaning and abrading Corroless EPF Potable epoxy. I did this in 2008 OK ever since. Maker Coatings (the supplier) advised me that this coating was used by major ship builders to line there potable water tanks. 2.5 lites in 2008 was £30.67 inc. PM me if you require any more details. I have no connection with the supplier/manufacturer
coopec
N/A
malindi
"Maker Coatings (the supplier) advised me that this coating was used by major ship builders to line there potable water tanks"
I have no problem with that but did you see what the Gougeon Bros had to say about the use of epoxy by us amateurs?
Considerations for potable water tanks
We have adopted the broad policy of not recommending epoxy for drinking water tanks because of regulatory and safety issues. The potential problems outweigh the benefits. To date, none of Gougeon Brothers' epoxies meet FDA regulations or any other drinking water certified approval. The major long-term concern with any plastic water tank is extractives leaching out in the water. Off-ratio, poorly cured epoxy can release extractives, as noted above. In the fabrication of water tanks and food handling equipment, the successful use of epoxy requires thorough mixing and adequate elevated temperature post-cure to assure the maximum cross-linking and cure of the polymer. These process controls are not always possible with the home-built tank"
http://www.westsystem.com/ss/wood-epoxy-composite-tank-guidelines/
"Maker Coatings (the supplier) advised me that this coating was used by major ship builders to line there potable water tanks"
I have no problem with that but did you see what the Gougeon Bros had to say about the use of epoxy by us amateurs?
Considerations for potable water tanks
We have adopted the broad policy of not recommending epoxy for drinking water tanks because of regulatory and safety issues. The potential problems outweigh the benefits. To date, none of Gougeon Brothers' epoxies meet FDA regulations or any other drinking water certified approval. The major long-term concern with any plastic water tank is extractives leaching out in the water. Off-ratio, poorly cured epoxy can release extractives, as noted above. In the fabrication of water tanks and food handling equipment, the successful use of epoxy requires thorough mixing and adequate elevated temperature post-cure to assure the maximum cross-linking and cure of the polymer. These process controls are not always possible with the home-built tank"
http://www.westsystem.com/ss/wood-epoxy-composite-tank-guidelines/
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