How do i turn the pressure in my hwc down - Water Heaters

If cold water has good pressure, and you are not on a well ,try turning water Off to water heater,open tap to relieve pressure remove hot side left water line to heater stick long screw driver inside pipe going inside water ,the heat trap is sticking it's rubber flap inside the pipe going in water heater.

Deep well.
Pressure valve located on front of above-ground-storage-tank will turn pump on-off depending on amount of water pressure inside tank.
When water is consumed inside home, the pressure valve responds to the lower pressure and closes electrical contacts... sending electricity to water well pump located deep underground.
The pump turns on and lifts water through a pipe into the above ground storage tank.
When the tank is full of water, the pressure valve senses the higher pressure and turns off electricity going to pump
Pump shuts off.
There is a one-way check valve on the water line going down to pump, and this keeps water from flowing back down into well.
The above ground tank maintains water pressure for the house.
When pressure is reduced by taking a shower, the pressure valve turns pump on again, and cycle repeats.

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Turn the burner back on & make sure you have correct water level in the boiler.

Hi, try turning up your temp setting in your rinnai. Also , it may take a few seconds to get hot water if the tap is quite a way from the hwc.

Hi, if you have a mains pressure HWC, all you need to do is shut the cold mains off either from your cylinder cupboard or on the street. Shutting it off on the street is probably better as things like shower valves tend to pass water through and start a back feed.

pressure would go down any time the water is cut off. Temp went down no make up water relief went off cause you turned it up. put it back and put the main back on.

1.Check for a fault heating element.
2.Use a meter to test the element.

on the pipework below there may be a silver braided hose with one or two valves on the end. turn the valve(s) so the handle is inline with the pipe this will allow water from the mains supply into the heating circuit , remember to keep an eye on the pressure gauge. fill the system to 1bar cold then shut down the valve(s). turn on the boiler and it should be ok, if you lose pressure again then you may have a leak somewhere which needs to be found.

you need a certain amount of water pressure for the water heater to turn on this is actaully one of the biggest problems that all manifactures forgot to tell anyone it is normal for the computer to shut down beings it is designed to heat water at a fast rate when you turn the water down, it's not enough pressure for for sensors to turn on to heat the water so turn on the spigot a little more and enjoy