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I am installing bulk heads, tank is three months old and the previous owner had a gasket on flange and glass sides. Are both gaskets needed? I have one that keeps dripping ever so slightly and can't get it to stop. Surfaces look good on gaskets and flanges. These bulkheads are going in the bottom of the tank where the corner overflow box had been cut out. So they are permanent and can't be tinkered with without draining 80 gallons of water onto the floor....
You only need a gasket on the flange side of the bulkhead, regardless of if the flange is on the wet side or the dry side, it always goes against the flange not the nut. Only one gasket is required and I would not add the second as it could hinder tightening the jamb nut properly.
Its not inside and outside as a bulkhead can be installed either direction depending on the application. It is flange side and nut side and the gasket always goes against the flange side even if you install the nut inside the sump or tank and the flange on the outside.
Correct. You dont want the nut spinning against the gasket. You want the gasked squeezed betewwn the flange and tank glass.Just like a bolt, the nut screws on and the flange is the flat surface under the head of the bolt. With a bulkhead, the gasket is always on the flat or flanged surface, never on the screw on or nut surface.
PVC male adapters have a tapered pipe thread so get tighter as they screw in further. If the 3/4" screw all the way in without any force or assistance I would be concered about a good seal, they should tighten up and not bottom out. Sounds like the 1" are a good fit though.
The LaCo will make the fittings screw in easier while providing a good seal. Make sure to clean out the threads real well so it does not scoop the sealant out as the thread them on.
Anywhere you have water against the bulkhead. So, 1 and 4.Its been six years and you are still helping people in this thread. Thats awesome. I am building a paludarium with an overflow box at the bottom of the tank because the water level will be only 5-6 inches deep. The bulkhead i need to install will go through this set of materials...
Internal overflow box : tank glass : spacer/gasket : external overflow box
The internal overflow box requires that the bulkheads flange be inside itself. The external overflow box is so low that it hangs below the tank itself and therefore needs some type of spacer or gasket to ovoid it from sitting crooked against the black trim at the bottom of the tank.
My question is where do i need to put my gaskets so that i can avoid leaks? I have labeled the locations in red numbers and #3 is where a gasket/spacer is required.
The way I am looking at it is there is water in 1-2 and 4 then you would need a bulkhead gasket in those areas having pressure against the gaskets. You would also need a space were 3 is so the in no stress on the tank glass and what ever 4 is made out of. the spacer would also help with be able to put tension/pressure when you tighten down the bulkhead nut.Its been six years and you are still helping people in this thread. Thats awesome. I am building a paludarium with an overflow box at the bottom of the tank because the water level will be only 5-6 inches deep. The bulkhead i need to install will go through this set of materials...
Internal overflow box : tank glass : spacer/gasket : external overflow box
The internal overflow box requires that the bulkheads flange be inside itself. The external overflow box is so low that it hangs below the tank itself and therefore needs some type of spacer or gasket to ovoid it from sitting crooked against the black trim at the bottom of the tank.
My question is where do i need to put my gaskets so that i can avoid leaks? I have labeled the locations in red numbers and #3 is where a gasket/spacer is required.