Talking about Storage Water Heater, do we require to service/clean it up after x number of years? It seems the one that I am using has dropped significantly (About 8 years old).

if the power plug for the heater is preinstalled inside the shower room slightly above where the heater should be located, is it safe? since steam travel upwards. usually the plug/switch is located outside. in this case the plug is inside the showerroom do we need special installation or seal to prevent water mist going in?

also for such installation any reliable brand? just need safe & reliable. if got build in pump is good to have but normally i don't think will use it, but sometimes water pressure maybe low.

hows those standard models sold in shops like Panasonic?

water pressure is higher when the elevation is lower.

unless you mean moving from upper floor down to 1st floor.

can you give an idea how much % boost the pump gives? i'm not fancy the pump is always on. are there other Panasonic models that can manually turn off the pump?

also the non-jet pump version of your model, is exactly built the same minus the pump?

how much amp does heater normally use (with pump) can normal switch & cable support?

I bought the same Panasonic water heater for my parent house.
My parent house is landed house, where upper stair water pressure is very low. Whenever someone use water downstair, there will be almost no water coming out from the previous water heater shower head.

Since changed to this Panasonic water heater with pump, no more this problem, I can't give you a percentage boost from the pump, but it does solve low water pressure problem.

I do not own the non-jet pump version of the water heater so I have no idea, but from the spec, it looks like the non-jet pump version just lack of the pump only, if compare to the jet pump version.

I do not actually know how many amp use, but from the spec, the rated power is around 3.6kW, so around 15 Amp. My condo existing wiring no problem with this water heater. Switch better use double pole switch.

Yes, it is not safe. The hot humid will corrode the copper contact inside.

It is best to change to direct wiring with a RCD. Or halcyon27 have some good wall socket recomend. https://forum.lowyat.net/index.php?showtopi...post&p=86464475

I not sure you stay in land of building. You have to determine is your house pressure is ok or not. We can't feel it by writing here.

Reliable brand mostly are those in the market for very long. Ex, Panasonic. It make heater for very long. Before you born.

Other, try search their history.

Yes, I believe it should.

I've had the socket in bathroom for more than 10 years and never has any problem with it. This socket is not meant to be switch on and off but I had a switch outside the bathroom. For the socket, I placed it high above the water heater.

It is not like you will have your bathroom like sauna. My bathroom is passively ventilated.

the switch outside did you add or original came with?

if i add this will it help? btw most plugs have same dimension right?

https://www.lazada.com.my/schneider-kavacha...omer.0.0.NeaZpf

sauna no, but mirrors do get fogged up with the heater on.

My bathroom did not have socket for heater initially. I added a 3-pin socket (with switch) and place it high and cannot be access without chair or ladder. This socket is for convenience in case I need to change the heater. You can have a connection box with screwed cover but in convenient for me. I added a 20A switch (the one with light indicator) at normal switch height at bathroom entrance door. This will enable me to switch on and off the main supply to heater, though not necessary.

The waterproof cover as shown on link is okay but I would say it is unnecessary in my case. My socket is high enough to avoid water splash during showering. You also do not want your wet fingers to switch on and off the heater

I would not worry about steam on 3-pin plug. The plug is warm during operation and the mist go away before it cools down after usage, thus will not have condensation issue on the plug.

You have to open up and see if it have problem or not. If it not kaboom, doesn't mean it have no problem.


Here is 1 of my experience. This plug extension is hide behind the cupboard. Extension mainly use for hairdryer, clock and occasionally vacuum and steamer. Running fine for over 15yrs this extension.

Have some electrical problem in my home lately and 1 day decide to upgrade some old extension and wiring. When open up the plug, saw this burning, corrode and almost break connection. This probably cause by the vacuum or the steamer running at high wattage. Which I didn't notice it cause the plug hide behind the cupboard. And might catch fire if I use it longer time.




This is the wall socket for the induction cooker. Everything look fine from outside. But once you ply open inside and see, the contact is full of carbon and the surrounding plastic melt. I have post this before and explain in another thread.

No question about that. Over time, even in dry area, the copper inside your plug and socket will corrode. It even worse due to high humidity in Malaysia. The only thing I want to comment is that the plug should not melt like that. I believe it is not even approved material even in Malaysia. Not TNB nor SIRIM approved type. This type of material will cause fire. With SIRIM approved plug, you can probably see trace of black carbon seeps through join gap but it will not melt or even burn if torched.

I suggest you replace that king of socket or plug material

Here another owner of his heater when wire get corroded and what happen. Read it down.

https://forum.lowyat.net/index.php?showtopi...post&p=65158976

facebook link not working

Sorry, this content isn't available at the moment

It looks like the brown live wire was not long enough and was twist joined and taped over. This was not professionally done. Something electrician should have not done. If require wire joining, make sure to use a wire joiner with screw. Use ceramic type to avoid plastic melt and fire.

When the point of contact get corroded, the resistance value builds up. So, the contact points works like mini heater. This also happens in the wall switches as well and 3-pin plug switches, not only at the point where you connect wire. You can open up and check the sockets, plugs and switches fro time to time but the most important thing is to have those sockets, plugs and switches from reputable brand and approved by SIRIM to avoid fire.

thanks, may be because that was in year 2011. Unfortunately, lowyat rules, do not allow me to post my FB link. So u can check my garage sale or google my company builders hardware enterprise

hi, anyone using DH-3NDP1MS or similar water heater?

want to ask regarding the ELCB Test Button, when you press the button, do you feel a click on the button?

i haven't install the heater yet but when i push the ELCB button at bottom up, i press the ELB Test button, i don't feel anything, not even a click like button should, is something wrong?

hi there, i just got my Panasonic Water Heater (similar to yours but without the pump & digital LCD (just turn knob).

can you do me a favor, can you test the water heater button with the power source (switch) turned off, when you push the ELCB "Reset" button at the bottom up, when you push the ELB "Test" button, does anything happen? will the Test button stay jammed like you can't press the 2nd time like it stays flat? or you can keep pressing the Test button like you can feel it's not stuck?

coz i haven't connected the heater yet but my test button seems to have "jammed". i'm not sure if it's designed to this way until power is connected, or the button is faulty.

will be a life saver thanks.

I just tried, the ELCB button works only whenever the unit has power supply to it.
Pressing that button without power supply won't produce the "click" feeling and sound.

ok thanks alot, just to confirm it's the square button on the face of the heater, not the reset button at the bottom.

i always though buttons are buttons only difference is whether it works or not when you press. 1st time i see button stuck when no power connected.