Recently I bought a copper water canister/ water bottle for a project I'm doing.
I'm looking to use it to replace an inline filthy broken stock water-reservoir in my Samsung fridge. My fridge has a 5/16 LLDPE tubing connecting to it providing water (inlet) and a 1/4 LLDPE tubing connecting to it (outlet). Both of these are push-to-connect fittings. I'm looking to equip this copper canister with push-to-connect fittings and use it instead of the OEM plastic water reservoir.
I'm aiming to use 3/8 outer-diameter push-to-connect fittings for both IN/OUT flows. I'll then run 3/8 tubing to the back and bottom of the fridge and use reducers to 1/4 and 5/16 (which I've already purchased). Of the two fittings I need to put on the bottle, one fitting will be very easy because I can drill in at the bottom of the bottle (which is just plate copper). I'm planning on drilling in with stepped drill bit, and putting on a 3/8 push-to-connect through-wall bulkhead fitting on it. There is only enough room on the bottom for one fitting, and I don't want to tap into the top because I feel like that will compromise the structural integrity of the copper top which is needed when closing the bottle.
While I'm open to any input, the other fitting I'm wanting input on. How can I mount a 3/8 female push-to-connect to the side of a cylindrical bottle. My concern is that if I drill into the side of a cylinder I won't be able to torque the side of the bottle enough to make a water proof connection. These fittings are just plastic. And if I drill into the side of a cylinder and flatten it out afterward, I assume the geometry of the hole will no longer be what I'm expecting (the hole will warp). What ways are there to create a through-wall water proof connection to the side of a cylinder?