Rubine RWH 3388 Rainshower Instant Heater

Low Noise Inverter DC Pump

The silent operation of DC pump creates
peaceful experience which is remarkably
quiet at just <45db.


For Anti-Scalding Protection.

Safety thermostat for anti-scalding



5 years warranty for heating element and tank.


UK Technology Heating Element

Ensuring peace of mind with quality and reliable
UL-approved heating element.


For delivery of your products. Please find Qxpress shipping option in Cart Checkout.

You Can Checkout Without Paying Anything!

You can make your reservation order from us without paying a single cent until we confirm your order and stock availability.
A follow up call or WhatsApp message (within 1-2 Working days) to inform you of your order and advise you on the payment method.
All prices you see are NETT with NO mark up.
Order with confidence!

Enjoy the feeling of a natural rain shower with the advanced technology of our new BOW 3388 instant water
heater – the inverter DC pump series.


This sleek design low noise DC pump water heater is the next big thing in the water heating industry; besides saving 55% of energy
cost, it is also equipped with a Tri-way diverter that enables
you to collect warm water for your baby bathtub or handwash clothes.

It comes in 2 colors, the popular matte black and the classic white and with matching rain shower and 5 functions hand shower. Never need to complain about low water pressure again, we got everything you need to make a shower feel every bit as indulgent as the world’s best bath.


Model RWH-3388
Type of Pump Inverter DC
Rated Power 3500W
Rated Voltage 230V
Rated Frequency 50Hz/60Hz
Rated Current 15A
Min. Working Pressure 0.02MPa
Max. Working Pressure 0.4MPa
Min. Flow Rate 2L/min
Net Weight 2.3kg
Colour Black / White
Safety Mark 200894-11
Waterproof IP Rating IP25
No. of spray 1 (Overhead), 5 (Handshower)
Package Included Water Heater + Rainshower Set + Mounting Hardware
Warranty (T&C’s Apply) 1 Year Parts + Service / 5 Years Heating Element and Inner Tank

Click on the Whatsapp Icon to ask us any question!
Remember to indicate on the product you are enquiring about.


We deliver for FREE with minimum purchase of $200 within a single trip


We provide to you with the best value with service that strives to satisfy you


All Products are awarded 1-4 years warranty unless stated otherwise


Advice will be given to you before you commit to purchase. We offer high value consultation with no obligation. Feel free to message us should you require any customization or co-ordination on delivery and/or installation.


Professional installers ready to install Heater, Water Works, Ceiling Fan and Lightings. Previewing available upon request. Installation appointment only via whatsapp chat or call.

SKU N/A Category Tag

Reviews About Light Guru

Rated 5 out of 5
September 12, 2022

Fall in love with the legrand galion switches, champagne gold. Appreciate Mr Fong in telling us more in details. Would recommend my friends and family to get switches from here.

Rated 5 out of 5
March 15, 2022

Recommended by a close friend on LightGuru. Mr Fong, handled our enquiries profesionally & knowledgeable. 2 thumbs up!!

Izwan & Iza
Rated 5 out of 5
February 28, 2022

Seller friendly and knowledgeble on the products and advises as per your needs. Shall patronise again😊

Rated 5 out of 5
February 17, 2022

Bought again after trying them out first time. This time I bought 12 sets! Just installed them and all good. Thanks guys! Good job! 👍🏻👍🏻

Rated 5 out of 5
February 15, 2022

Love the lights. Since it is 3 tone, it give a different aura for the environment. Highly recommend to buy from the store. ♥︎