Malcolm1952

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In a marine tank the water return can you use a 40 mm or 50 mm pipe going through the tank to the sump?


Also is there any glue to repair a tank under the water line or will i have to drain the water first?
 

459b

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Size of pipe will depend on tank size and how much water is flowing from tank to sump. 40 or 50 is normally fine.

What needs to be fixed on the tank? You cant glue glass underwater.
 
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Thanks for a prompt reply

I have installed the 40 mm pipe through the tank to the sump.
The pipe is leaking on the plastic fitting inside the tank which is now full of water.
So the repair is on plastic pipe to plastic fitting.
This is a brand new tank
Came home last night the sump was overflowing checked eveything and it can only be that fitting in the tank.
I was thinking of using pratley or something otherwise i will have to drain the tank to fix. Would pratley be safe for a marine tank?
That is why i asked about the pipe being the right way to go.
If i drain the tank i can change how the drain works as i have seen on this forum using a box around the drain.:(
 

459b

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Can you post a photo of the plastic fitting?
If its a bulkhead leaking then you can drain the tank a bit and glue it.
Plratleys is safe in marine tanks but not your best option for fixing leaking pipes, rather go with silicoine sealer.
You can use an overflow box in you wish (most people opt for this) but a simple pipe, although a tad noisy, can work. My tank has two pipes as the overflow without a box
 
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Basically the pipe is 40 mm but the bulkhead fitting going through the tank is 50 mm, so the 40 mm pipe has a fitting on the end that increases the pipe to 50 mm going into the bulkhead fitting,that fitting is leaking, should have glued it onto the pipe but i forgot.
So basically use prately which i have used on swimming pools quite successfuly or drain tank.
I was just worried the prately would effect the fish and corals which i have not bought yet.
 
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Pratleys is reef safe. We use it to stick our rocks and corals together underwater all the time. I just don't know if it will make a plastic-on-plastic seal that well. I know you have been missioning to fill the tank but if it were me, I would drain the water and make sure the plumbing works right the first time.
 
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Thanks for all the help.
Leak repaired then another leak this time on the return pipe so that was easily fixed.
Running the tank now and got the heaters running as well.Going to get the salt water tested today then will put the argonite in the bottom this afternoon.
So this weekend i should be able to get the Live rock purchased and put in the tank.
Happy Chappie now:m14:
 
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