How to Cut Porcelain Tile Around a Shower Valve Hold the porcelain tile over the shower valve and mark the area that must be cut away. Place a piece of masking tape over the center of the area to be cut away. Dip the guiding bit into cooling oil and place it on the masking tape in the center of the section to be removed. Click to see full answer. Beside this, how do you drill through tiles without cracking them?Use a carbide-tipped masonry bit; regular twist-drill bits can’t cut through the fire-hardened glaze. You’ll also need to keep the bit from slipping off the glossy surface. The secret: Put two strips of masking tape onto the tile in an X pattern as shown above.Secondly, how do you drill through tile? Use a carbide-tipped masonry bit; regular twist-drill bits can’t cut through the fire-hardened glaze. You’ll also need to keep the bit from slipping off the glossy surface. The secret: Put two strips of masking tape onto the tile in an X pattern as shown above. Also know, what is the best drill bit for ceramic tile? Tile bits with ground tungsten carbide or diamond tips are the best for this purpose. They are both designed to drill into hard surfaces, and both of them puncture the tile with a cone-shaped hole.What is a shower valve?A shower valve performs two basic functions, it controls the temperature and the flow of the water in your shower. It controls the temperature by mixing hot and cold water from your hot and cold water supplies in different proportions and generally has a single control to do this with.
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