Yes but instant have its own problem. During rainy day you won't get good warm water if flow rate are high.

Ok, Joven is 70c, maybe different brand have its own standard.

http://www.joven-electric.com/product_deta...d=1&series_id=2

Yours 2500watt, take longer to heat up vs mine 3000watt

When we have a rainy season, have to turn the instant water to the max to have a warm feeling of water, and pressure is on the average side. When using direct incoming water is even worse, only have a normal room temperature water.

My mom go off to work around 5am+, rainy season (year end), her water heater is at the max setting all the time, and have to reduce the water flow. Her's is direct incoming. I changed the wiring for her twice because of the load.

You cannot 100% prevent but reduce the possibility.

Joven is been around for decades, I am using one

Yes, the pump installed before the storage.

Nope, mine is fine, pressure are good.

Water pressure problem not the fault of the water heater unit, is the incoming water pressure. No doubt there will be some drop of water pressure after passing through the heated element (for instant heater).

Mine is Joven too. I remember there is few other brand that selling it, could be Alpha

Immediately if it was used previous day. If left if off for two days or more, just 5mins will do. If you have bigger storage will need wait bit longer.

You can add earth to the SS/Copper pipe

If you let the pump dry run, it will burned. Worse will caught fire. Water pump is design to run with water. And is only kick on when flow are detected. Something is not right with your pump.

The benefit of switching off the main switch is much greater than leaving it on permanent. Imagine if you have power surged and it will damage your water pump. Pump now have move electronic component, and it also waste energy.

I don't know about that brand. For Panasonic, and Canton that I have experience before, is not worth the money. + Labor and actual pump from the same manufacture will cost almost the same buying one. Furthermore buying one is Brand New and 1 year warranty. Repair only the motor.

Think of safety, 4-5 hundred ringgit for a new unit give you some assurance of safety.

Nope, but you need to check the spec, some instant water heater cannot support if pressure too high.

Maybe some smart fellow use one as looping.

All my Instant water heater with build in pump won't last > 4 years. While the one without pump still going strong.

Storage will provide water at much high temperate, hence you don't need so much water inside the storage. Water tank is also storing water do you feel having germs inside? Every house have a water tank, apartment and condor have even bigger tank.

If the photos is your bath room, you can install instant water heater but on the roof there the storage suppose to be, or you need to hack the wall and tap out the water tap to install.