someone told me that if the house water pressure is not strong, the water heater with pump is useless too. how true is that?

Like most bathroom, my bathroom has a shower head and a control valve. If I were to install a water heater, I'll need to disconnect the current shower head, plug in a flex hose and link it to the water heater. This will make the shower head useless.
I would like to retain the shower head when I need a normal cool bath.
How do I connect then? Is there a proper and nice looking "switch" that allows me to divert the water to the heater only when I need a hot bath? Kindly post photos please.

Filter clog faster too.

water heater inlet filter

Here's the electrical connection coming out from my bathroom wall. What's the best way to connect to my heater, yet water proof? Is there anything like a waterproof in-line splice?
Prefer not to drill any hole to my tiles.



Does this type of flexible hose greatly reduce the water supply pressure/flow? It's normally use for hand shower outlet. Therefore I'm not sure. I plan to use this because this is the only type of flexible non-conductive hose that I can find.



This post has been edited by Skylinestar: Feb 27 2022, 03:28 PM

best way to water proof this? just wind multiple layer of tape?

you say direct, but the wires from the wall are too short. need to splice with the wires that come out from the heater.

what's the minimum water pressure needed to install water heater? is there something like a gauge that i can easily plug to my faucet tap to check the pressure before i spend money on a water heater, which then I will regret because of too low of water pressure?

Want to buy water shower/heater from shopee/lazada but having issue on installation.
How do I look for proper person to install it? Someone says look for certified electrician. How about the water part? Need some "mod" to hook up the water supply to the heater inlet. Probably need to climb to the space above the bathroom, modify the pipeline from the water tank side, add 1 pipe from the ceiling to the place for the heater. I doubt the electrician is fit to do the water job. This is for my bathroom in the 1st floor where the water supply pressure is a lot lower than the ground floor. How do I go about this?

Is Centon (seller OnsenMY on shopee) as good as Panasonic? Any other good brand?

This post has been edited by Skylinestar: Aug 25 2022, 04:28 PM

so how do i even begin? start with electrician or plumber?

my flow rate is currently 3 liter in 1 minute.

This post has been edited by Skylinestar: Aug 25 2022, 08:12 PM

Recently I bought a Panasonic water heater-shower. The model is DH-3UP1MW. I upgrade from decades old National water heater. I think the water is totally not hot enough. Normally, with the temperature knob at the middle position (on any other heater that I have tried), it is hot enough for cold morning. Now, with this new water heater, even with the temperature knob set to max, it barely gets warm enough, and I have to restrict the water flow rate to even achieve that, which also defeats the purpose of buying this new model with water pump. After using for 2 weeks, I went back to the shop and asked about it. They said it's normal. They sent worker to my house to check and said it's normal for this model.

What do you guys think?

old unit has more flow and still hotter than new unit.

I have a 3.6kW Joven in the house. it is a lot hotter than this Panasonic.