A toilet float can be adjusted.
You can elevate the ball float by turning the screw above the fill valve. Raising the float should raise the water level and hopefully solve your water pressure problem.
To adjust the water level, you'll simply need to adjust the float. Start by turning off the toilet's water supply, then open the toilet tank and see what kind of float it has. How to adjust the toilet float is determined by what kind of float your toilet has.
Clean Them: Use a wire hanger or a small brush to clear out any blockages, which can improve flushing performance. Use a Toilet Tank Bag: These bags can be filled with water and placed in the tank to increase the water level temporarily, leading to a stronger flush.
Another way to increase flushing power in a low-flow toilet is to adjust the water level in the tank. On some models, you can do this by adjusting an internal float that controls how much water flows into the bowl.
How to Convert a Low-Flow Toilet to High-Flow. Unfortunately, it's not possible to convert a low-flow toilet to a high-flow or pressure-assisted toilet. The only option is to replace a gravity-flush toilet with a pressure-assisted flush toilet.
Ball float adjustment
Adjust the water level by turning the screw clockwise to lower the ball or counter-clockwise to raise it. Only turn the screw one rotation at a time, then flush the toilet to see if it works efficiently.
Toilets with a larger flush valve and a greater volume of water in the tank tend to provide a stronger flush.
Clear Flush Holes
These small holes push water from the tank down the sides of the toilet bowl to make sure all waste water flushes down the drain. Over time, the siphon jets will inevitably become blocked with mineral deposits. Clearing up the mineral deposits can provide more water pressure.
Often you can set the water level by adjusting the float. Toilets with ball floats and arms usually have adjustment screws or dials to raise or lower the arm. If your toilet mechanism has a cylinder float, squeeze the float clip to release the float so you can slide it up or down to the correct level.
To raise the water level, turn the tank water level on float valve counterclockwise. To lower the water level, turn the screw clockwise. below seal height, turn the seal screw clockwise, reflush the toilet and recheck the water level.
Here's how to address PRV issues: Locate the PRV, usually near the main water shut-off valve. Look for an adjustment screw on top of the valve. To increase pressure, turn the screw clockwise.
If your toilet won't flush and it's not clogged, it could be that the tank has too little water. After every flush, you should hear the sound of water filling your toilet tank back up.
It should be a 1/2-inch or less below the overflow tube. Now, adjust the water level up or down accordingly, and flush the toilet to check that the level is balanced and one-half inch below the top of the overflow tube. Repeat until you get it just right. That's it!
Low Water Level
If the water level in the toilet tank is too low, it can affect the flushing performance. More water might generate more force to clear the waste effectively, resulting in a sluggish flush.
Ensure the tank's water level is high enough to provide adequate flushing pressure. If your toilet has an adjustable flush valve, experiment with the settings to increase the flush strength. Replace the flapper valve if it's old or damaged. You can soften it with Vaseline as a temporary fix.
Bowl Differences: Location of the OutletIn a low flow toilet, the outlet is located near the center of the bowl while it is located near the back end of the toilet in a regular flow toilet, meaning that less water is used to push waste in the direction of the exit.
Power Flush Toilets Deliver Water Savings and More
Pressure-assisted toilets are effective using as little as 1 gallon per flush (gpf), while gravity toilets often use 1.6 gpf or more in older models. Pressure-assisted toilets are also less likely to need double-flushing, because waste is pushed out on the first flush.