Clean the Showerhead
The easiest trick to how to increase shower head pressure is to clean it. Over time, showerheads will get blocked with dirt and mineral deposits. Because of this, the water flow will become just a trickle. Water pressure can be good in the rest of your home, but be slow in one area.
Leaky, corroded and clogged pipes can lead to low water pressure in the shower. The showerhead might be so old it needs to be replaced. The shower controls could also be responsible for flow issues.
For water conservation purposes, most plumbing codes require faucets and showering devices to not exceed a certain maximum flow rate. Removing the flow restrictors could cause these devices to no longer meet these codes.
Two big reasons: To help lower utility bills -- and to conserve water. According to the EPA, the average family could save 2,700 gallons per year by installing WaterSense labeled showerheads. Since these water savings will reduce demands on water heaters, they will also save energy.
Look on the main supply pipe near your water meter for a conical valve that has a bolt sticking out of the cone. To raise pressure, turn the bolt clockwise after loosening its locknut. Keep an eye on the gauge to make sure the pressure is within bounds, then retighten the locknut.
If your water pressure seems low, the first step should be to test how much pressure you're actually getting from the shower head. A typical home's water pressure should be somewhere between 45 to 55 psi (pounds per square inch).
National standard - 2.5 gpm
This includes all type of shower heads like hand-held shower, wall mount shower head, shower head systems, and rain showers. For shower heads made pre 1990s, it is still possible to find 3.5 gpm flow rate or even higher.
If you're looking for the most pressure, go for the 2.5 GPM Flow Rate, unless you are restricted because you reside in California, Colorado or New York. Again, this has been the Maximum Flow Rate since 1992. The step down from there in Flow Rate is 2.0 GPM.
A fast drop in only one faucet means there's a problem with the faucet. Rapid low pressure affecting one area of the house may mean a corroded pipe issue. An abrupt water pressure drop affecting the whole house may mean a water main break (municipal water) or a well pump problem (well water).
Low water pressure can be the result of a problem as simple as a partially open water main valve that needs to be opened all the way. Additionally, low water pressure can also be the result of a much bigger problem, like a major leak, or the narrowing of the galvanized piping.
The short answer is low water pressure in your home arises due to a number of causes. Some include a shut or blocked water meter valve, mineral buildup clogs pipes, corroded pipes, or even a crack in the main city supply pipe to your home.
Normal psi for a home pipe system is between 30 and 80 psi. While you don't want the psi to be too low, it violates code to be above 80. Instead, you should aim for a psi that's between 60 and 70.
Find the spigot closest to your source of water. Make sure all the taps and other water uses are turned off in your house. Now turn on the spigot and see how long it takes to fill the bucket. Dividing the number 60 by the time to fill the bucket will give you the gallons per minute number.
Fortunately, if you are suffering from low water pressure in the shower, there are a range of quick fixes that can improve the flow of water in your shower. These include: Cleaning out the sediment. Replacing the shower head.
If low water pressure is affecting only your shower head, you should check for an obstruction in the shower head or see if your shower head has a water conservation filter installed. Otherwise when demand for water is high (such as in the morning or early evenings) pressure can be lower than during the rest of the day.
The center of the restrictor is shaped like a star, or similarly shaped, and comes in a variety of colors. It's found behind where the shower head screws off of the pipe coming out of the wall or at the end of the flexible hosing of a handheld shower head.
Flow restrictors limit the amount of water flowing downstream, while pressure regulators affect the pressure of upstream water by changing the flow of downstream water. Water pressure regulators are not designed to control flow rate. However, they affect flow rate by managing the pressure within a water line.
GPM means Gallons Per Minute. Also known as "flow rate", GPM is a measure of how many gallons of water flow out of your shower head each minute. Since 1992, a maximum of 2.5 GPM is the federally mandated flow rate for new shower heads. This means no more than 2.5 gallons of water should flow out each minute.
Most low-flow showerheads have a rubber pressure-reducing valve (called a regulator) to maintain a lower pressure. You can increase the flow by simply taking it out. You could also consider enlarging the hole that allows water into your showerhead with a drill to increase the amount of water coming through.