How many psi is the flow pressure range for faucets and tank-type water closets?

The flow pressure range for faucets and tank-type water closets typically falls within the range of 15 psi to 20 psi. It is essential to maintain adequate pressure to ensure proper function and efficiency of the fixtures. A flow pressure of 8 psi is generally considered too low, as it may not provide sufficient water flow to operate faucets and toilets effectively. Water pressure in this range could lead to poor performance, causing issues such as low flow rates and delayed refill times in tank-type toilets. Understanding the acceptable pressure range helps plumbers ensure that installations meet operational standards and customer satisfaction.