Kwik Stepper 34403 Multi-Hole Step Drill Bit, 1/4 - 13/16 in Dia x 3-5/16 in OAL, 3/8 in, 12 1/8 in Step, 2

Hi! Thank you for your query about the Moen UT4691BG valve only trim. The inner handle is the one used to adjust the volume. Please refer to page 8 of its installation manual for more information. Thank you for trusting PlumbersStock. Have a great day!

Hi! Thank you for your query about the Moen UT4691BG valve only trim. A pressure-balanced cartridge maintains a consistent water temperature by adjusting the flow of hot and cold water to compensate for pressure changes. This prevents sudden temperature fluctuations that can cause scalding. A thermostatic cartridge, on the other hand, allows you to set a specific temperature that remains constant regardless of changes in water pressure. Thermostatic faucets offer more precise temperature control and are often preferred for safety and comfort. Once you are ready to order this tub and shower faucet, just click on the "Add to Cart" button, fill in the information needed, and we'll take care of the rest. Thank you for trusting PlumbersStock. Have a great day!