Acrylic overflow removal and sump build

[Egon]

Today is the first of three days for me so I might actually get something done on the tank. I am planning to place a 1/2" cell cast acrylic patch over the 4 round holes and the 1 square hole with a 2" overhang on all sides. I would like to router a radius on the outside top of the patch so there are no square or sharp corners. Then flip the tank over and patch the holes from the bottom using acrylic plugs that fit the holes as best as I can.
First I am going to call Tenecor and see what they suggest, I could be way off on how to patch this. The sides are 5/8" thick and they hold so I would think 2" overlap is way overkill as well as plugging the holes from the bottom.

You can just put bulkhead fittings there and plug the fittings with a PVC plug, no gluing then.

I would of done the above on my tank but my stand required a smooth patch, basically no room for a bulkhead fitting.

I tried to glue a patch down on my holes in the bottom of my acrylic tank with "Weld-on" acrylic glue. I had a leak! I went over the area with silicon glue and repaired the leak. If I could do it over again I would just use the silicon glue, it's flexible and seals great for this application.

 

[B_IN_SD]

Thanks for the advice Egon, I went and read your 360 build and how you patched it. I wish I had your talent for doing backgrounds.

 

[Egon]

Thanks for the advice Egon, I went and read your 360 build and how you patched it. I wish I had your talent for doing backgrounds.

Thanks man!

 

[B_IN_SD]

Well after nearly a year of sitting in the garage the tank is patched ! I used a router to finish removing the center overflow then I used most of a large tube of weld on 16. I set 3 2x's on the patch to hold it down. after that cured for a day I used weld on 4 to go around the edge of the patch where the 16 did not flow to and tonight I ran another bead of 16 around the edge of the patch like silicone. Hopefully it will hold when it is leak checked this Saturday.

Now for the next problem, the weld on 16 that I initially used flowed through the holes and bonded the tank to the plywood : { has any one else had his Happen to them ? and will it come off easily ?


The tank is still dirty from the sanding and scraping of the tank bottom to get if flat, but you can see the patch is in place.

 

[Egon]

That looks great! Will hold water for sure!
I think the wood will lose the fight when you remove the tank. I would slide and turn the tank all in one motion with out lifting the tank off the plywood. That will separate the two. Worst case put pressure on the joint by pushing on the tank and have someone hit the wood with a hammer in the other direction, the sharp hit will pop the tank free.

 

[B_IN_SD]

That looks great! Will hold water for sure!
I think the wood will lose the fight when you remove the tank. I would slide and turn the tank all in one motion with out lifting the tank off the plywood. That will separate the two. Worst case put pressure on the joint by pushing on the tank and have someone hit the wood with a hammer in the other direction, the sharp hit will pop the tank free.

I will try that, Thanks

 

[Jon M]

Damn that came out clean. I would have definitely removed the center overflow as well. I actually acquired a similar "should be" peninsula SW tank off craigslist used. It has an overflow on the right side of the tank centered against the side panel. Pretty sure it's meant for a peninsula. I was going to remove it but I was worried about leaving some nasty marks on the side panel where it was connected so I just left it. Patch looks clean. Look forward to seeing this come together more. Subscribed.

 

[dirtbikerider]

Very nice! Good to this thread alive again! Looking good so far

 

[The1and only]

the weld on has sunk in to the wood and filled the air space so it will need some work to get it off. I had this happen on a smaller project and just wiggled it until the wood came off. I then had to clean up the area that had wood stuck to it.

 

[B_IN_SD]

A few taps with a dead blow hammer on the plywood and all is good. Today is leak check day. It took what seemed like forever to fill the tank. 4 hours full and all is good !
First pic is 100 gl. second is 200 gl. third is 300 gl. Tomorrow before I go to work I am going to drill the overflows and drain the tank.