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**PSI can’t be directly converted to GPM**; these are two different units of measure. PSI measures pressure and GPM measures flow rate. But if other variables are known, the water’s flow rate in GPM can be calculated with the help of the Bernoulli equation for incompressible fluid and careful unit conversion.

- Measure the pressure inside the tank using a pressure gauge.
- Subtract the atmospheric pressure from the tank pressure.
- Multiply the result from step 2 by 2 and divide by the density of water.

- pound (water mass) per hour to gallons US per minute = 0.0020 gal/min.
- pounds (water mass) per hour to gallons US per minute = 0.0040 gal/min.
- pounds (water mass) per hour to gallons US per minute = 0.0060 gal/min.

The PSI refers to the amount of pressure produced and **GPM** refers to the amount of water flow. … PSI (Pounds per Square Inch) refers to the amount of cleaning pressure the machine can produce. GPM (Gallons per Minute) is the amount of water that is coming from the machine.

**GPM is** usually more important to contractors than PSI. Since most contractors use cleaning chemicals to do all of the cleaning, their job becomes one primarily of rinsing the dirt away.

To determine GPM using a larger container take **the container capacity in gallons, divided it by the number of seconds needed to fill container, then multiply times 60**. The result is the GPM. Example: Using a 5 gallon container it takes 14 seconds to fill the container. 5 / 14 X 60 = 21.4 GPM.

For the example, the amount in psi is 400. That multiplied by 20 gpm equals 8,000. **Divide that number by 1,714** to obtain the hydraulic horsepower. For the example, 8,000 divided by 1,714 equals 4.667 hydraulic horsepower.

Assume Average Pressure. (20-100PSI) About 12f/s flow velocity | ||
---|---|---|

3/4″ | .75-.85″ | 23 gpm |

1″ | 1.00-1.03″ | 37 gpm |

1.25″ | 1.25-1.36″ | 62 gpm |

1.5″ | 1.50-1.60″ | 81 gpm |

**Pound per hour** is a mass flow unit. It is abbreviated as PPH or more conventionally as lb/h. Fuel flow for engines is usually expressed using this unit. It is particularly useful when dealing with gases or liquids, as volume flow varies more with temperature and pressure.

How many U.S. gallons are in one pound of water? **1 gal = 8.35 lb wt**.

One US liquid gallon of fresh water weighs roughly **8.34 pounds (lb)** or 3.785 kilograms (kg) at room temperature.

2,000 – 2,900 PSI: This is a moderate strength unit used heavier residential tasks. … 3,000 – 6,900 PSI: These high pressure models are what professional pressure washers and contractors usually use. They are commonly used in commercial and industrial settings, and can run on either gas or diesel.

Both of the types of pressure washers required an uninterrupted, steady water supply or GPM (gallons per minute). For most home projects, many people find that using a pressure washer with **1300 to 2400 PSI** is the best.

2,000 PSI **is usually good enough for the average homeowner**, but it’s important to be realistic about your expectations. You’ll be able to freshen up the average dirty surface, but taking on tougher conditions (like mold or oil stains) will more than likely require more cleaning power.

Brand/Manufacturer | Cleaning Units (PSI x GPM) |
---|---|

Ultimate Washer | 72,500 |

Pressure Pro | 28,000 |

Shark/Karcher | 25,000 |

Kranzle | 20,900 |

Car washes typically blast out their liquid at **1,000 to 1,200 PSI**, although pressures can go up to 2,200 in some situations. For this reason, along with the squirts of hot wax and slaps from towels, we do not recommend going through a car wash on foot.

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.

To perform the five-gallon bucket test, you **place the five-gallon bucket beneath the flow of water and time it while it fills up**. You will need to know the total number of seconds it took to fill the bucket.

This is a loaded question, that really comes down to preference and the number of individuals that are in the home. The average household needs 100 to 120 gallons per person per day, and a flow rate of about **6 to 12 gallons per minute**.

It would take **45 seconds** to fill the 5 gallon bucket. It would take 25 hours to fill 10,000 gallons.

Engines make hp based on how much air and fuel they can run through them, and how much energy can be extracted from each pound of air that runs through the engine. So 5psi would be **about 33% increase in power**, 10psi would be 66% increase, 15psi would be 100%.

Boost and Horsepower If you’re running 8 psi of boost, then that’s an approximate **234 horsepower with a turbo and 210 to 222 with a supercharger**.

You can ROUGHLY estimate max boost as follows. The 0.9 factor is the ~VE for the typical intake tract under non-boosted conditions. The number 3,456 is just a mathematical factor to make the units come out properly. 1,000/546 = 1.83*14.7 = 26.9 – 14.7 = 12.2psi is the approximate max boost at 6,000rpm with 1,000cfm.

PIPE SIZE (inches)CAPACITY (gpm)2**34**223875541801155311165

Assume Average Pressure (20-100PSI). About 12 f/s flow velocity1-1/2″1.5 – 1.6″4,8302″1.95 – 2.05″**7,650**2-1/2″2.35 – 2.45″11,4003″2.9 – 3.05″16,350

Pipe Size (inch)Maximum Flow (gal/min)Velocity (ft/s)2**45****4.3**2 1/2755.031305.642606.6

Kilopound [kip]Pound [lbs]1 kip**1000 lbs**2 kip2000 lbs3 kip3000 lbs5 kip5000 lbs

MPPH = **Million Pounds Per Hour**.

additional 170 Btu – about 100 Btu is usable. • Saturated steam is typically measured in. units of mass. **1 Mlb = 1000 lb of steam =** **about 1 MmBtu**.

Weight in Pounds:Volume in Gallons of:WaterMilk18 lb2.1569 gal2.0941 gal19 lb2.2767 gal2.2104 gal20 lb**2.3965 gal****2.3267 gal**

The dry gallon, also known as the corn gallon or grain gallon, is a historic British dry measure of volume that was used to measure grain and other dry commodities and whose earliest recorded official definition, in 1303, was the volume of **8 pounds (3.6 kg) of wheat**.

A gallon of milk weighs **8.6 lb**, and a quart of milk weighs 2.15 lb.

A gallon is a measurement of volume and density is directly proportional to the mass of a fixed volume. Milk is about 87% water and contains other substances that are heavier than water, excluding fat. **A gallon of milk is heavier than a gallon of water**.

While liquid water and frozen water have different names and some different properties, **the kind of matter remains the same**, and for a specific sample of water, the weight does not change. The volume of a sample is not conserved across a phase change.

**No, water and ice do not weigh the same**. For example, if we take the same volume of water and ice in the same container, water would weigh more than ice. … Therefore, ice floats on water since its density is less than that of water.

The power of pressure 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.

The most versatile category of pressure washers, those ranging from 2,000 to 3,200 PSI **effectively clean cars** (including the most well-used off-road vehicles), home siding, fences, boats and grimy garage floors. Those closer to 3,200 PSI work effectively on tough stains, too.

Anything **less than 2000 PSI should be fine** for pressure washing your car to get it clean. Most cheap small electric pressure washers likely won’t come close to this amount of pressure but should be more than adequate for washing a car.

**Do not use an extension cord**. They can drastically shorten the life of your machine. If you must use one, it must be 12 gauge wire if over 25 feet in length. Using any length of 16, 18 or lighter gauge extension cord will not supply enough power to your pressure washer and the motor will not start or run properly.

What kind of pressure washer do you need? Power washers come in two basic types – gas and electric. … Gas will give you more power, but you really only need 1300 **to 1600** PSI for most exterior cleaning needs, including vinyl siding. Gas pressure washers usually range from 2000 – 4000 PSI and cost more than electric.