The most common cause of low hot water pressure is the water heater shut off valve being partially shut.
Tankless water heater low water pressure.
Common tankless water heater problems hot water is not delivered instantly and other common tankless water heater problems are listed below.
In some cases this valve may have been closed and never fully opened again.
How to check test the pressure.
Turn the gas back on and enjoy better pressure from your hot water.
It is possible that the water heater valves are not turned all the way after installation so that makes it the first thing you should check.
Burner does not ignite.
The burner is too noisy.
Even if the valve is slightly closed it can cause a significant decrease in hot water pressure.
No expensive flue required.
Low water pressure after replacing the water heater.
Water is not hot enough.
The shower head is included in the package alongside a gas regulator and all the necessary adapters.
Most people have a low pressure problem after installing a new water heater.
Vent free for indoor or outdoor use.
Ideal for small apartments hunting or fishing cabins small homes boats campers rvs and mobile homes.
Open the water valve on the supply side of the tankless water heater.
Open several hot water until no air is coming out from the faucets.
One other note if you have a water softener it too can cause low pressure in all faucets downstream from it and for the same reason as your tankless.
Plus it works at up to 120 psi.
If low pressure is due to the low flow showerhead for example and your tankless water heater cannot get the required water flow change the showerhead to a newer model.
Starts up with only 2 psi.
Testing the water pressure is vital as it might indicate not only low but high pressure too.
Each water heater has a shut off valve to use in case of emergencies.
Mount the heater on the side of a caravan to enjoy an outdoor shower.
No hot water often related to the flame failure and no ignition water is too hot.
Low water pressure startup.
Check for water leaks on the fittings you took apart.
The ideal water pressure for best results is between 2 8 and 110 psi.
Holds up to 150 psi.
The excel tankless propane water heater is equipped with a magnetic flow sensor that allows the unit to start up at only 2 psi water pressure.