Poor water pressure is often caused by clogged pipes and may also be due to reduced pressure in the water line due to leaks, equipment failures, or blocked service hoses, but most faucets are equipped with a water limiter. For new faucets, the pressure may be lower than the old faucets could provide. When it comes to an old installation, the truth is that we get used to the pressure of the shower faucet and maybe we do not realize that we have only a thin trickle of water and we think it is enough. Contact our professional plumbers if you cannot fix the issue on your own.