sealing a 2" hole?

[cowboycove]

I don't know how safe it is to seal a 2" hole. Anyone know how simple it is and how safe it is. I'm afraid 15000lb of pressure would be too much to hold. I want to cut out the existing glass overflow. Seal up the 2 inch drain. Then drill the drain hole up top with a coast to coast slim overflow on top only.

 

[planbtypea]

Personally, seems a little iffy. I would talk to some glass/tank shops in your area and see what they have to say.

 

[cowboycove]

Personally, seems a little iffy. I would talk to some glass/tank shops in your area and see what they have to say.

I figured there's already pressure regardless. Im thinking the only thing I need to worry about is leaking. But still. I'm not a specialist. That's a lot if weight to put on the glass. I assume the over flow lightens the pressure around the hole too. Not sure.

 

[toromp]

You could always put a plug in the bulkhead.

 

[BigDaddyStar]

+1...that's the safest way to go...Although I think you would be just fine cutting a piece of acrylic and silicone it in place.

You could always put a plug in the bulkhead.

 

[zigginit]

its not hard to seal at all. water weighs in at .43 psi per foot of elevation. so a 2 inch hole has an area of pie x R squared. so that's 3.14 square inches. so if your tank is 24 inches tall then that only 6.28 psi of water pressure needed to hold back. I don't know how you got 15000. just get some thick glass and silicone on both sides and call it day.

 

[cowboycove]

its not hard to seal at all. water weighs in at .43 psi per foot of elevation. so a 2 inch hole has an area of pie x R squared. so that's 3.14 square inches. so if your tank is 24 inches tall then that only 6.28 psi of water pressure needed to hold back. I don't know how you got 15000. just get some thick glass and silicone on both sides and call it day.

Oops. I meant 1500lb. Tank is 36x36x24. I guestamated including sand/rock weight.

 

[zigginit]

sand and rock weight are distributed around the hole. beside the patch will pick up the slack as it acts as a brace. its round so it has no defining edges for which a crack would start.