Patching old closed loop holes Acrylic Tank

[Tink]

I have an Acrylic 180 (1/4 acrylic I believe, its a Clarity Plus brand) I want to set-up, but it was drilled with 4 closed loop holes in the bottom. I'm not sure if I feel very comfortable with bottom drilled drains in a tank, so I would like to patch over the holes with some squares of acrylic.

 

 

 

My question is, what type of weld-on would be best suited for this project (3,4,16,40)? The patches will be made on the inside of the tank, and oversized by about 1" to cover the hole.

 

 

 

 

 

Thanks

[MBVette]

Im not sure you want/can patch a hole perfectly like that.  Why not just use a bulkhead and cap off the pvc

[Coral Hind]

I did the same thing to an old tank to use it as a sump.  I used 16 as it is a thicker cement and offers some time to work with it, great at filling gaps. We have two professional tank makers here as vendors so shot one of them a PM to get their advice.
 

[Coral Hind]

Where about are you located? I have some scraps if you need them to cover the holes.

[Kevin Garrison]

Weldon 16 is awesome, my son knocked my EV120 off a counter and I was able to repair some major breakage using it.  Skimmer works like a charm with no leaks... other than I can't seem to tune it for crap

[Tink]

Where about are you located? I have some scraps if you need them to cover the holes.

Thanks for the offer, but I think I have enough scraps around to patch these 4 holes.

 

 

As for the suggestion of 16, have you ever heard of it not doing well over time? I've read a few reports that it has become brittle on folks after a few years. Is 16 good enough to create a lasting water tight seal under the pressure at the bottom of a tank?

 

 

Thanks for the help everyone!

[steveoutlaw]

Im not sure you want/can patch a hole perfectly like that.  Why not just use a bulkhead and cap off the pvc

 

+1 - That way when you upgrade the next owner can use the holes if they want.........and you will upgrade.........trust me!! 

[Coral Hind]

I just fear the rubber gaskets on bulkheads. They seem to fail with age as the rubber deteriorates, so it depends on how long you plan to have the tank. To me once glue it is safe no more worries. Next owner can always still use the holes with bulkheads, just drill out the piece you added. Bulkheads are long enough to go through both the original tank and your added patch..

[Tink]

I just fear the rubber gaskets on bulkheads. They seem to fail with age as the rubber deteriorates, so it depends on how long you plan to have the tank. To me once glue it is safe no more worries. Next owner can always still use the holes with bulkheads, just drill out the piece you added. Bulkheads are long enough to go through both the original tank and your added patch..

 

Exactly my thought process on the matter.