Quality Plumbing Supply stocks dozens of shower valve faucet pressure balancing cartridges from all the major faucet manufacturers. Replace those worn out, leaking, dripping and damaged shower valve pressure balancing cartridges with new shower pressure balancing cartridges and get your showers working like new.
If your shower is not mixing the water correctly or leaking inside the wall you may need to replace the shower valves pressure balancing cartridge. Pressure balncing cartridges balance the water pressure between the hot and cold water if one has a higher pressure than the other giving your shower and even distribution of hot and cold water. It will also help prevent scalding if the cold water pressure drops for any reason.