The work is not much. Plumbing work is just a few hours. Maybe plumber will charge for one day's work.
Tiler's work also not much. Maybe charge also one day's work.
The problem is to get them to do these work. It is now towards the end of year. Most of them will be hard press to finish their work on hand. So, may be reluctant to take on minor jobs.
If you managed to get any, they may change extra....
Anyway, where is your place located? Klang valley?

The new hse is actually a condo in Sentul.

anybody who done this setup whr instant heater with conceal piping for the rain shower head, do u face any drop in water pressure?

isit sufficient pressure for the rain shower head without any external water pump?

have anyone done this together with an additional hand shower?

It very much depend on your incoming water pressure. You can try install the instant heater and conceal pipe first. If pressure not enough, than put in the pump.

wats the min water pressure leve/ratingl should i see and check with my plumber before proceeding

Check your rain shower head spec. Not your instant heater.

Rain shower Head specs??

If I will to buy a square 10" rain shower, I need to ask the seller whether its compatible with instant heater or how shud I check?

Quite confuse in this

10", i don't think the instant water heater pump can give good water pressure, unless the incoming pressure is already good. Than again, if it flow too fast the water may not be warm enough.

Here is a video of I70P with 10" rain shower

Since you know what is water pressure, just ask what is the recommended or minimum water pressure for the 10" rain shower head to work. 10" require higher pressure than 8" or 6" to work. Simply because of number of nozzle.

Either they will tell you need 40-60psi or flow rate of 9l/m. (example) if they tell you anything will do or don't no, better walk out from that shop.

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Added on November 20, 2011, 8:48 amThe pump water heater can't handle the 10" shower head or even 6". Even a small but high flow rate shower head have problem too.

What he require is external pump to instant heater to 10" shower head. But as you said, flow to fast water not warm enough. He got to find a better water heater.

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Added on November 20, 2011, 8:54 amNot bad already that 10" rain shower head. Still can work. Did the instant heater with the pump?

This post has been edited by ozak: Nov 20 2011, 08:54 AM

that is Joven I70P with built in Silent pump + inverter

so the "on" "off" that fella said is actually turning on and off for the I70P rite?

What this means is, the larger the size of the rain shower head, the higher the water pressure required. This is because, the water must be able to fill the rain shower head quickly in order to get a nice steady stream of water. You don't want to experience only the middle part of the rain shower head coming out water.

I will be using a 10" rain shower head as well and I installed a water pump to ensure that the water pressure is nice and steady. Want it to rain and not just drizzle mar.

this is what im planning to do.. to conceal inlet & outlet piping of the water heater.. got few questions:

1) does the outlet portion need to be replaced with copper piping?

2) usually the water heater pump will stop if to water flowing right? coz i will use main stop cock only.

3) do i need to place the water heater unit higher than shower head?

Exactly what I'm going to do to my two bathrooms. Actually the hardest part is not the piping, but the concrete and tiling works since job involves hacking, buying matching tiles, and tile installation which would cause U more than the plumbing work.

I thot no many ppl would want this type of layout, but seems like I'm not alone

Currently having difficulty finding a good tiler.