The flow rate of a shower is a common question for people looking to buy a new showerhead. There is no true answer on the best flow rate for a shower because it depends on multiple factors, such as how much pressure you want, where the water will go, and the size of your bathroom.
This article will discuss how you can find out precisely what flow rate you need with tips and tricks that will help you choose between 1.75 pm and 3.5 GPM showers!
- Understand How Pressure Works: The pressure in most showers comes from two sources: Waterpik flowing up through an opening at the top of the unit and air blowing against the surface. The combination of these two forces creates pressure.
- Water Pressure: The term “water pressure” describes water’s amount of energy on a surface, measured in pounds per square inch (psi). The higher the thermostatic water pressure, the more power the water has to push against you, which means it feels like more water is coming out of the showerhead. Because it’s related to friction, though, higher water pressure can lead to scalding hot water.
- Gallons Per Minute (GPM): Gallons per minute (GPM) is a flow rate measurement. It’s calculated by dividing the total volume of water drenching through your shower system in one minute by 60. If you were to shower with a 1 GPM flow rate, for example, 60 minutes would pass while the entire amount of water would flow through your bathroom.
- A GPM Calculator: A GPM flow rate calculator can help you determine how much flow rate you need for your shower. By plugging in the dimensions of your bathroom and what type of fixtures you want to use, such as a handheld shower or handheld sprayer, the calculator will tell you what GPM flow rate you need.
- GPM vs. PSI: Water pressure is typically measured in self-explanatory units: pounds per square inch (PSI). PSI describes how much force water exerts against a surface. Water pressure differs from flow rate (also known as volume) because flow rate represents the amount of water flowing through something within a specific amount of time.
What is the best flow rate of a shower?
It is pretty straightforward that longer showers will use more water pressure than shorter ones. That means that the total amount of water that passes through your shower head will be higher if you want a lot of pressure. But water flow rate isn’t always directly proportional to pressure. Determining what GPM flow rate is suitable for your shower is mainly based on your flow restrictor situation.
You can determine what flow rate you need for your shower by using a few simple experiments. For example, you could fill up a tub with water Raindance until it overflows, measure the amount of water in the tub, and calculate how much time passed for this event to occur. A common misconception is that higher flow rates are always better, but that’s not true. If you have a large bathroom or want more pressure on certain parts of your body, you would like a high flow rate. If you want a more gentle spray, you would need a lower flow rate.
Is 1.75 GPM good for a pressure shower?
The answer is that 1.75 GPM or a little more is a reasonable flow rate for most people. In an experiment, we filled up a bathtub with water until it overflowed and measured how much water there was at the end. A pipe going through a showerhead has a cross-section about half an inch wide, which means that a lot of water passes through this pipe each second. When calculating the volume of water, we had filled up the bathtub so that it filled up to 100% capacity – meaning that all of the water in it would be flowing through one cross-section at a time.
Results: At 1.75 GPM flow rate, the water-filled the tub in 8 minutes and 37 seconds. The total amount of water in the tub from the faucet aerator is 96.08 gallons. In comparison, if we used a 2.5 GPM showerhead, this same experiment would take 18 minutes and 30 seconds to fill up a bathtub with 96.08 gallons of water instead! That’s a difference of over five times more water at the same flow rate from the shut-off valve! So the theory that high flow rates always result in more efficient showers isn’t accurate!
Now you’ve learned how to choose between 1.75 GPM and 3. 5 GPM showers! It is important to note that showerheads are rated by gallons per minute (GPM). It means that if you have a shower with a 1.75 GPM flow rate, every minute will result in the same amount of water droplet filling up your bucket, no matter how long you are in there.