So I was really missing my bottle washer today as I am cleaning a few carboys.
As no one had any thing to say I decided to just give the water weld a shot. I reread the claims for it and it would seem to be perfect. Cures food safe and will cure under water (not just in the presence of... not that I am doing that.) Seems to suggest it will withstand some pressure. I am no engineer so I have no idea what this means but it claims a tensile strength of 6000 psi, a compression strength of 12000 psi, a shear strength of 700 psi and an hardness of 65-70 psi. Again, not sure what that means in laymens terms but I am thinking my household water pressure is not anywhere near high enough to compromise. I highly doubt my hot water heater will ever heat the water to 300F
so that should be safe.
Well, I will post back one way or another in case anyone else ever finds themselves in this situation.