Pressures above 80 psi are too high. Whereas low water pressure is more of a nuisance than a serious problem (some fixtures, like washing machines, have minimum pressure requirements), high water pressure carries with it a significantly increased risk of damage to pipes, joints, fixtures and seals.
High Pressure: High-pressure systems operate at pressures above 1000 psi (70 bar) and can extend to several thousand or even tens of thousands of psi.
If you plan to only do residential, then a 3000 psi machine will work great. If you plan on any commercial down the road , you should spend the extra money for a 3500 psi machine. If you need a really long hose you will lose some psi. I would get a skid.
The ideal water pressure level is between 50-70 PSI.
If your water pressure goes above 70 PSI (even occasionally), you should install a pressure regulator to your main water line.
While you should always stay within this range, you should also never be below 20 PSI, or over 50 PSI, or you risk serious tire damage (more so than with standard overinflated or underinflated tires to a lesser degree).
But you shouldn't go too much over recommended PSI. You can safely over-inflate tires by up to 10%. For example, if your tires have a recommended PSI of 35, you can go up to around 38 PSI without worry. Anything more than that is too much and not recommended.
Most people strive to have their water pressure to be somewhere between 50 psi and 70 psi.
If it's above 80 psi, you probably need to lower your water pressure.
Most residential plumbing systems are designed to handle 40 to 60 PSI of pressure, with 80 PSI being the typical maximum and anything over 100 PSI being possibly detrimental to plumbing components.
The water pressure in your house measures how fast water travels through your pipes and out of your faucets. Normally, the standing residential house has a water pressure of around 80 PSI (pounds per square inch). Anything above 80 PSI is considered too high and can cause serious damage to your pipes and equipment.
If you want to clean your driveway quickly and efficiently, use a pressure washer of at least 3100 PSI. Using pressure washers with pressures ranging from 1000 to 2300 PSI will also help you clean your driveway, but it will take a long time.
A unit with too low of a PSI might struggle to remove stubborn grime and grease, while one with too high of a PSI could damage sensitive surfaces or equipment. Pressure washers that range from 2,000 to 3,000 PSI are generally suitable for most industrial cleaning tasks.
Ideal PSI for Commercial and Heavy-Duty Applications
Pressure washers with a PSI of 2500 to 4000 are considered more suitable for these heavy-duty cleaning jobs, offering the power needed to tackle stubborn dirt and grime.
2,000 - 2,900 PSI: This is a moderate strength unit used heavier residential tasks. These units are commonly sold as either electric or gas pressure washers. 3,000 - 6,900 PSI: These high pressure models are what professional pressure washers and contractors usually use.
In general, siding and driveways are the most common surfaces that can be easily cleaned with a pressure washer rated at 2,000 PSI, with a tip capable of delivering 2,000 pounds of force per square inch. For most people, this will be a good choice as it can handle most tasks around the house without breaking the bank.
While 50 to 70 pounds per square inch (psi) is the ideal range, most plumbing fixtures are designed to work with water pressure up to 75 psi. Anything higher than this can damage your pipes and fixtures.
It's important to maintain your home's water pressure within an acceptable range. The ideal water pressure ranges between 40 and 80 pounds per square inch, with the recommended home water pressure at 60 psi.
If your pressure is higher or lower, then you'll need to install, repair, or adjust your pressure regulator to comply. Adjusting your regulator is easy, as long as it's working properly. Simply tighten the screw down clockwise to increase pressure and counter-clockwise to decrease pressure.
Occasionally, too much pressure may also result in the fluid pumping backward within the pump and creating backflow.
This causes damage to essential water pipe joints, fixture heads, and valves. In addition to the failure of such fixtures, high water pressure can lead to pipes bursting when they cannot contain the water.
Normal water pressure range
In general, residential water pressure ranges between 45-80 psi (pounds per square inch). If your water pressure is under 40 psi, it's considered low. A psi between 20-30 is considered very low, and under the minimum water pressure required by most building codes.
The ideal psi is between 40 to 60 psi, anything over 60 should be looked at by a plumber. Anything below 30 and you likely have a leak.
You might find 40 psi suitable for some vehicles, especially if they're carrying heavier loads or if the manufacturer's recommendation is close to that figure. However, it's generally too high for most passenger cars, which usually recommend between 30-35 psi.
High water pressure
Sustained pressure that exceeds 80 psi can damage on-site plumbing systems and may affect your water fixtures. If the water pressure at your property is 80 psi or greater, a pressure reducing valve (PRV) will help decrease the water pressure.
The higher the psi, the more force the water is putting on your pipes. The ideal water pressure range for most homes is between 60 and 70 psi. If your water pressure is 80 psi or higher, you're likely going to run into some serious plumbing problems.