Sealant for outside potable water?

Soldato
Joined
20 Mar 2004
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4,597
The flexible pipe on my pond filter inlet has split.

I've got some replacement piping but i want to use some sealant to help connect it to the filter.

Can anyone reccomend a sealant that I can use outside that is safe for fish/potable water?
 
Fernox jointing compound is safe for potable water - would that work?

 
The flexible pipe on my pond filter inlet has split.

I've got some replacement piping but i want to use some sealant to help connect it to the filter.

Can anyone reccomend a sealant that I can use outside that is safe for fish/potable water?

You mean seal it on or stop potential leak?
If its connection only I prefer physical personally so would use a jubliee clip.

Silicon is fine (for both if you want) you must just ensure you get pure silicon and not one with anything funky like anti fungal stuff in it.

Plenty of tropical fish channels on youtube list ones that are compliant.
Or an search on Amazon etc.
 
Basically you need naturally curing silicone with nothing in it, no biocides, no anti mould etc.

Personally based on the description of what you are doing, I wouldn’t bother.
 
I had a liner pond before building my own second 14,000 litre pond.

two options:

* MS-290 which is well known in the fish community and works (i ordered 20 tubes from ideal sealants for my pond window) https://idealsealants.com/products/idealseal-ms290-sealant-and-adhesive

Wear gloves because this stuff is sticky takes an age to get of hands.
It’s a marine sealant (long water exposure) and fish safe.

+ gold label - expensive in a “fish” packaging in an order of magnitude more expensive.

* vulcanisation patch but needs a complete clear down and clean of the area then rince before fish are rentroduced.

In terms of split flex pipe the. i’d probably switch the pipe out. Flex pipe makes it a pain so use a 1/2 pipe section over the top of the split with MS-290 would work.

It would be simpler to replace the pipe if you can with clips on each end.
 
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