Will the water pipe leak without the raw material belt?

This depends on the level of personal installation. Is it possible that the second water pipe will not leak after being screwed on, but the safety factor will be higher in the case of raw rubber. Is it hot melt to install plastic water pipes? Hot melt does not need a raw material belt, but it can be installed without a raw material belt in the case of a faucet. But the water must be safe, because living in a building must be waterproof. Health, wish you happiness, wish you happiness.