A: The original Cold Water T-Adapter included with your kit is 7/8” x 7/8” x 3/8”. The toilet tank connection is generally known as a 7/8" ballcock thread fitting in the USA.

If the original 7/8” Cold Water T-Adapter is too big /small, please feel free to reach out us, we'll offer a better solution.

A: This tape is used to wrap male threads, helping to prevent leaks. It is optional.

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