Tile Lining of Over Head Tank

Tile lining might be one way, but I would Google "tank linings" for other possibilities. Epoxy paint or some kind of plastic liner might also work, and you could compare advantages, disadvantages, and costs.

Sorry, you can never use Epoxy paint for lining of drinking water tank. Epoxy paint is not suitable for potable water tanks. Once my office overhead tank was painted with epoxy by one of the foolish contractor. The smell of epoxy remained in water for one month.

Never is a bit extreme.

It was filled too soon without a wash.

Slight epoxy odor for a month won't kill you. You want to try diesel flavoured water.

Why was potable water stored in a roof tank in the first place? Potable water is best left inside the delivery pipes at pressure to ensure it stays that way until needed.

If it has to be stored then uncoated concrete is not the best choice. Epoxy was probably the best option from an undesirable list of options. How was the tank sealed? I've seen some horrors...

But hey, I'm just second guessing the same as you.

"Slight epoxy odor for a month won't kill you. You want to try diesel flavoured water."

Can you drink such water?. If yes then I can too.Tank was washed, also paint mfr. has suggested that it is not suitable for potable water tank. Your country may be allowing such treatment but not here. Can you show me any paint mfr. recommending such painting. Better do your home work first before making such funny comments.

You CAN drink any liquid my friend. No joke. Some can kill you though.

Diesel flavoured water was consumed under duress. More coffee powder masks the taste OK. That was decades ago, I didn't get sick and there's nothing wrong with me now.

Did the paint manufacturer pipe up before he sold the coating or after the complaint?

You said epoxy. There are loads of epoxy based potable water tanks eg GRP. New tanks have a smell that fades. Not toxic.

As for epoxy based sealants for potable water tanks here's one: http://www.sherwinsaudi.com/IndustrialPDF/FS360.pdf

Homework? Who is being funny now? Can anyone else smell something...?

Potable water storage tank interior coatings should conform to U.S. National Sanitation Foundation (NSF) Standard 61. Some specialized epoxy coatings do conform to this standard....many do not.

There also AWWA Standards to follow also.........

Tiles have joints between them, joints leak, so it seems like a daft idea to me.
EPDM liner is what I'd go for.
Del
(Other liners are also available)

OP, you haven't told us if this concrete tank is currently lined with tile (ceramic?) or not, and how much leakage/seepage is occurring. Also, are there any noticeable cracks in the concrete, including narrow concrete shrinkage cracks? Additionally, if this storage tank used for fire fighting, if need be (like in NYC or other older modern cities)?

IF you have deep cracks that penetrate through the concrete tank wall, then you must repair those first, by routing out the crack down to sound concrete and apply a good quality epoxy-modified cement repair compound or another concrete repair compound. Check out Silka Corp. (there are many more companies that are acceptable) for their concrete repair products. If you are not sure which one to use than by all means hire a Structural Engineer to aid you in the repair process and finding the appropriate repair compound(s)....you may need several different ones, depending on the severity and locations of any discovered cracks.

If you have not discovered major cracks in the concrete, then there is a terrific product available on the market to seal the concrete against seepage and leaks: XYPEX. I highly recommend it!

IMO, re-tiling the tank interior is just putting a Band-Aid on the problem(s) and not actually solving anything. In fact you may even have a joint issue or structural issue with the tank, especially if it is an older one....have it check out by a professional!

yes, of-course.

Tile lining is cheaper and best method compare to other things like epoxy and all.

Also the property (porosity and permeability) of the tiles to be considered during the selection of tiles.

Proper grouting of tile joints shall be done to avoid any seepages.

A concrete tank will only leak or seep (excessively) if the concrete has failed (for its purpose) or the design has not included watertight expansion joints.

Tiling as a fix or a prophylactic is only as good as the concrete it is covering.

Concrete swimming pools, for example, are tiled for aesthetics and ease of maintenance only. Tiling does not provide a watertight membrane but the ease with which such surfaces can be cleaned should not be overlooked.

This should help you start on your quest for a proper solution:

http://www.waterproof-concrete.co.uk/