Free Delivery On Orders Over $180 
Same Day Delivery 
Click & Collect 
Installment Payment 
Store Locations 
eGift Card Buy Water Heater
Looking to buy a water heater in Singapore? Gain City offers a wide range of water heaters, from instant water heaters to electric water heaters, to suit your needs and budget. Explore our range to find the ideal heater for your bathrooms today!
-
RHEEM STORAGE HEAT PUMP 280L RH-2805RH-2805
PROTERRA SERIESAdd to Wish ListS$3,469.00 U.P. S$3,488.00 -
CHAMPS INSTANT HEATER LEGEND-MBLEGEND-MB
W/RAIN SHOWER SETProduct Description
The Champs Instant Heater Legend-MB offers a blend of efficiency and style, perfect for modern homes. With advanced energy-saving features, precise temperature control, and enhanced safety measures, it ensures a comfortable and secure shower experience.
Key Features
Energy Efficiency: Save on energy costs with a high-quality polymer tank designed for optimal energy saving.
Temperature Control: Enjoy precise temperature adjustments with a high precision power selector.
Water Pressure Boost: Experience enhanced water pressure with a DC booster pump.
Safety Features: Double pole electricity leakage sensing device ensures safety against electrical hazards.
Anti-Scald Protection: Double safety anti-scald device for comfortable and safe showers.
Stylish Design: Available in Matt Black and Pearl White, complementing modern bathroom aesthetics.
Product Specifications
Weight: 2 kg
Power Rating: 3.3kW, 230V a.c 50Hz
Inlet & Outlet Water Connection: 1/2" BSP
Minimum Water Flow Rate: 2L/Min
Recommended Water Flow Rate: 4-6L/Min
Permissible Inlet Water Pressure: 0.1-0.3 MPa
Recommended Inlet Water Pressure: 0.1 MPa
Dimension: 236 x 413 x 95mm
Warranty: 5 Years for Heater Tank, 2 Years for Heater Parts
Color: Matt Black
Ideal For
The Champs Instant Heater Legend-MB is ideal for homeowners seeking efficient and stylish water heating solutions. Perfect for modern bathrooms and users who value energy efficiency and sleek design.
Add to Wish ListS$299.00 U.P. S$388.00 9% OFF GST ABSORBED -
MISTRAL INSTANT WATER HEATER-BLACK MSH103-BKMSH103-BK
W/RAIN SHOWER, DC PUMPProduct Description
The Mistral Instant Water Heater MSH103-BK offers a seamless blend of safety and efficiency. With advanced heating technology and a sleek design, it ensures a reliable hot water supply for your home. Ideal for both high and low water pressure systems, it features a silent DC pump and comprehensive safety mechanisms, making it a perfect choice for modern households.
Key Features
- Advanced Heating Technology: Enjoy upgraded UL Approval Heating Technology for efficient and safe water heating.
- Auto Water Flow Sensor: Built-in device switch ensures optimal water flow and safety.
- Electronic Temperature Control: Easily adjust the temperature with electronic variable power control.
- Safety First: Features anti-scalding thermal safety design and double relay ELCB to prevent electrocution.
- Splash Proof Design: Durable casing protects against water damage.
- Silent Operation: Equipped with a silent DC pump for a noise-free experience.
Product Specifications
- Voltage: 230V~ 50/60Hz
- Wattage: 3300W
- Min. Water Flow Rate: 2 L/min
- Min. Water Pressure: 10 kPA (0.1 Bar)
- Max. Water Pressure: 0.6 MPa (6 Bar)
- Product Dimension: L370*W210*H100 mm
- Packaging Dimensions: L996*W355*H107 mm
- Water Connection: 15 mm(1/2") diameter
- Net Weight: 1.81 KGS
- Gross Weight: 5.3 KGS
- Safety Mark: 230442-11
Ideal For
The Mistral Instant Water Heater is ideal for modern households seeking a reliable and efficient water heating solution. Perfect for families and individuals who value safety and convenience in their daily routines.
Add to Wish ListS$249.00 U.P. S$369.00 9% OFF GST ABSORBED -
MISTRAL INSTANT WATER HEATER-WHITE MSH103-WHMSH103-WH
W/RAIN SHOWER, DC PUMPProduct Description
The Mistral Instant Water Heater MSH103-WH offers a perfect blend of style and functionality. With advanced heating technology, safety features, and a sleek design, it ensures a comfortable and secure shower experience for every home.
Key Features
- Advanced Heating Technology: Experience quick and efficient water heating with upgraded UL Approval Heating Technology.
- Safety First: Equipped with an upgraded anti-scalding thermal safety design and a built-in auto water flow-sensor device switch for maximum safety.
- Electronic Temperature Control: Enjoy precise temperature adjustments with electronic variable power temperature control.
- Water Pressure Compatibility: Suitable for both high and low water pressure environments, ensuring consistent performance.
- Compact Design: Features a 3-in-1 compact stop, flow, and filter valve design for space-saving installation.
- Silent Operation: Operates quietly with a silent DC pump, providing a peaceful shower experience.
Product Specifications
- Voltage: 230V~ 50/60Hz
- Wattage: 3300W
- Min. Water Flow Rate: 2 L/min
- Min. Water Pressure: 10 kPA (0.1 Bar)
- Max. Water Pressure: 0.6 MPa (6 Bar)
- Product Dimension: L370*W210*H100 mm
- Packaging Dimensions: L996*W355*H107 mm
- Water Connection: 15 mm(1/2”) diameter
- Net Weight: 1.81 KGS
- Gross Weight: 5.3 KGS
- Safety Mark: 230442-11
Ideal For
The Mistral Instant Water Heater is ideal for modern households looking for an efficient and stylish solution to their water heating needs. Perfect for families and individuals who value safety and convenience in their daily routines.
Add to Wish ListS$249.00 U.P. S$369.00 9% OFF GST ABSORBED -
MISTRAL INSTANT WATER HEATER-BLACK MSH101C-BKMSH101C-BK
COPPER TANKProduct Description
The Mistral Instant Water Heater MSH101C-BK offers a blend of safety and efficiency with its advanced heating technology and splash-proof design. Ideal for any home, it provides reliable hot water on demand, ensuring comfort and convenience.
Key Features
- Advanced Heating Technology: Enjoy upgraded UL Approval Heating Technology for efficient water heating.
- Auto Water Flow Sensor: Built-in sensor ensures optimal water flow and safety.
- Variable Temperature Control: Easily adjust the temperature with electronic controls.
- Splash Proof Design: Durable casing protects against water splashes.
- High and Low Pressure Compatibility: Suitable for various water pressure levels.
- Compact Valve Design: 3 in 1 Stop, Flow, and Filter valve for convenience.
Product Specifications
- Model: MSH101C-BK
- Voltage: 230V~ 50/60Hz
- Wattage: 3300W
- Min. Water Flow Rate: 2 L/min
- Min. Water Pressure: 10 kPA (0.1 Bar)
- Max. Water Pressure: 0.6 MPa (6 Bar)
- Product Dimension: L370*W210*H100 mm
- Packaging Dimensions: L530*W250*H120 mm
- Water Connection: 15 mm(1/2”) diameter
- Net Weight: 1.4 KGS
- Gross Weight: 2.3 KGS
- Safety Mark: 230444-11
Ideal For
The Mistral Instant Water Heater is ideal for modern households seeking efficient and reliable water heating solutions. Perfect for families and individuals who value safety and convenience in their daily routines.
Add to Wish ListS$159.00 U.P. S$289.00 9% OFF GST ABSORBED -
MISTRAL INSTANT WATER HEATER-WHITE MSH101C-WHMSH101C-WH
COPPER TANKProduct Description
The Mistral Instant Water Heater MSH101C-WH is a state-of-the-art appliance designed for modern living. With advanced heating technology and a sleek, splash-proof design, it offers reliable hot water on demand. Perfect for any home, it combines safety, efficiency, and style.
Key Features
- Advanced Heating Technology: Features upgraded UL approval heating technology for efficient and safe water heating.
- Auto Water Flow Sensor: Built-in sensor device switch ensures automatic operation for convenience and safety.
- Variable Temperature Control: Electronic variable power temperature control allows precise adjustment to suit your needs.
- Splash Proof Design: Durable splash proof casing ensures longevity and safety in wet environments.
- Pressure Compatibility: Suitable for both high and low water pressure systems, ensuring versatility.
- Compact Valve Design: 3-in-1 stop, flow, and filter valve design for optimal performance.
Product Specifications
- Model: MSH101C
- Voltage: 230V~ 50/60Hz
- Wattage: 3300W
- Min. Water Flow Rate: 2 L/min
- Min. Water Pressure: 10 kPA (0.1 Bar)
- Max. Water Pressure: 0.6 MPa (6 Bar)
- Product Dimension: L370*W210*H100 mm
- Packaging Dimensions: L530*W250*H120 mm
- Water Connection: 15 mm(1/2 ) diameter
- Net Weight: 1.4 KGS
- Gross Weight: 2.3 KGS
- Safety Mark: 230444-11
Ideal For
The Mistral Instant Water Heater is perfect for modern homes seeking efficient and reliable hot water solutions. Ideal for families and individuals who value safety and convenience in their daily routines.
Add to Wish ListS$169.00 U.P. S$289.00 9% OFF GST ABSORBED -
MISTRAL INSTANT WATER HEATER-BLACK MSH101P-BKMSH101P-BK
Product Description
The Mistral Instant Water Heater MSH101P-BK offers a seamless blend of safety, efficiency, and modern design. Equipped with advanced heating technology and a splash-proof casing, it ensures reliable performance for every household. Ideal for both high and low water pressure, this heater is a perfect choice for any home.
Key Features
- Advanced Heating Technology: Features upgraded UL Approval Heating Technology for efficient and safe water heating.
- Auto Water Flow Sensor: Built-in sensor ensures optimal water flow and safety during use.
- Variable Temperature Control: Electronic control allows precise temperature adjustments for comfort.
- Splash Proof Design: Casing designed to prevent water ingress, ensuring durability.
- Pressure Compatibility: Suitable for both high and low water pressure systems.
- Compact Valve Design: 3-in-1 stop, flow, and filter valve for convenience.
Product Specifications
- Voltage: 230V~ 50/60Hz
- Wattage: 3300W
- Min. Water Flow Rate: 2 L/min
- Min. Water Pressure: 10 kPA (0.1 Bar)
- Max. Water Pressure: 0.6 MPa (6 Bar)
- Product Dimension: L370*W210*H100 mm
- Packaging Dimensions: L530*W250*H120 mm
- Water Connection: 15 mm(1/2") diameter
- Net Weight: 1.4 KGS
- Gross Weight: 2.3 KGS
- Safety Mark: 230443-11
Ideal For
The Mistral Instant Water Heater is ideal for modern households seeking efficient and reliable water heating solutions. Perfect for families and individuals who value safety and convenience in their daily routines.
Add to Wish ListS$119.00 U.P. S$249.00 9% OFF GST ABSORBED -
MISTRAL INSTANT WATER HEATER-WHITE MSH101P-WHMSH101P-WH
Product Description
The Mistral Instant Water Heater offers efficient water heating with advanced safety features like a double safety device and splash-proof casing. Its compact design fits seamlessly into modern bathrooms, providing reliable performance and easy installation.
Key Features
- Upgraded Heating Technology: Experience enhanced efficiency with UL Approval Heating Technology for consistent hot water.
- Auto Water Flow Sensor: Built-in sensor ensures optimal water flow and temperature control.
- Electronic Temperature Control: Adjust the temperature with precision using electronic controls.
- Safety First: Double Safety Device and Anti-Scalding Thermal Safety Design for peace of mind.
- Splash Proof Casing: Durable casing protects against water splashes, ensuring longevity.
- Compact Design: 3 in 1 Stop, Flow, and Filter valve design for space-saving installation.
Product Specifications
- Voltage: 230V~ 50/60Hz
- Wattage: 3300W
- Min. Water Flow Rate: 2 L/min
- Min. Water Pressure: 10 kPA (0.1 Bar)
- Max. Water Pressure: 0.6 MPa (6 Bar)
- Product Dimension: L370*W210*H100 mm
- Packaging Dimensions: L530*W250*H120 mm
- Water Connection: 15 mm(1/2”) diameter
- Net Weight: 1.4 KGS
- Gross Weight: 2.3 KGS
- Safety Mark: 230443-11
Ideal For
The Mistral Instant Water Heater is ideal for homeowners seeking a reliable and efficient water heating solution. Perfect for modern bathrooms, it caters to users who value safety and performance.
Add to Wish ListS$129.00 U.P. S$249.00 9% OFF GST ABSORBED -
CHAMPS INSTANT WATER HEATER VESTA-MBVESTA-MB
POLYMER TANKProduct Description
The Champs Instant Water Heater Vesta-MB offers a perfect blend of efficiency and safety with its high-quality polymer tank and advanced safety features. Ideal for modern homes, it ensures a refreshing shower experience with its luxurious rain shower set.
Key Features
High Quality Polymer Tank: Constructed with durable polymer material to minimize heat loss and save energy.
High Precision Power Selector: Allows easy and precise control over water temperature.
DC Booster Pump: Enhances water pressure while maintaining energy efficiency.
Double Pole RCD: Automatically cuts off power supply when leakage current is detected for safety.
Double Safety Anti-Scald Device: Prevents scalding by cutting off power when water temperature is too high.
IP25 Splash Proof: Protects internal circuits from splashing water.
Product Specifications
Weight: 4.7 kg
Dimensions: 27 x 63 x 16 cm
Power Rating: 3.3kW, 230V a.c 50Hz
Inlet & Outlet Water Connection: 1/2" BSP
Minimum Water Flow Rate: 2L/Min
Recommended Water Flow Rate: 4-6L/Min
Minimum Inlet Water Pressure: 0.02 MPa
Maximum Inlet Water Pressure: 0.3 MPa
Recommended Inlet Water Pressure: 0.1 MPa
Product Dimension: 216 x 425 x 87mm
Product Weight: 1.7 kg
Warranty: 5 Years Warranty – Heater Tank, 2 Years Warranty – Heater Parts
Colour: Matte Black
Ideal For
The Champs Instant Water Heater Vesta-MB is ideal for homeowners seeking efficient and reliable water heating solutions. Perfect for modern households that value energy efficiency and safety.
Add to Wish ListS$369.00 U.P. S$449.00 9% OFF GST ABSORBED -
ARISTON INSTANT WATER HEATER AURES EASY 3.3N SBSAURES EASY 3.3N SBS
VIETNAMAdd to Wish ListS$140.00 9% OFF GST ABSORBED -
ARISTON INSTANT WATER HEATER AURES PREMIUM 3.3 SBAURES PREMIUM 3.3 SB
VIETNAMAdd to Wish ListS$180.00 9% OFF GST ABSORBED -
CHAMPS INSTANT WATER HEATER VELA-WHITEVELA-WHITE
POLYMER TANKProduct Description
The Champs Instant Water Heater Vela-White offers a blend of efficiency and safety with its high-quality polymer tank and anti-scald safety device. Ideal for small households, it ensures energy and water savings with its innovative design.
Key Features
High Quality Polymer Tank: Constructed with durable polymer material to minimize heat loss and save energy.
Energy and Water Saving: Features a 3-in-1 stop valve for precise water flow control, reducing utility bills.
High Precision Power Selector: Allows easy and precise control over water temperature for comfort.
Anti-Scald Safety Device: Prevents water from reaching scalding temperatures, ensuring safety.
IP25 Splash Proof: Built with an IP25 rating to protect internal circuits from splashing water.
Massage Shower Set: Equipped with a massage shower set for a complete shower experience.
Product Specifications
Weight: 2.85 kg
Dimensions: 24 × 55 × 11 cm
Power Rating: 3.3kW, 230V A.C 50Hz
Inlet & Outlet Water Connection: 1/2" BSP
Minimum Water Flow Rate: 2L/Min
Recommended Water Flow Rate: 4-6L/Min
Permissible Inlet Water Pressure: 0.1 – 0.3 MPa
Recommended Inlet Water Pressure: 0.1 MPa
Product Dimension: 189 x 272 x 103mm
Product Weight: 1.1kg
Warranty: 5 Years Warranty – Heater Tank, 2 Years Warranty – Heater Parts
Ideal For
The Champs Instant Water Heater Vela-White is ideal for homeowners seeking efficient and reliable water heating solutions. Perfect for small households or apartments where space is a premium.
Add to Wish ListS$99.00 U.P. S$149.00 Member's Only Extra S$2.10 Off 9% OFF GST ABSORBED -
CHAMPS INSTANT WATER HEATER PERRY MBPERRY MB
COPPER TANKProduct Description
The Champs Instant Water Heater Perry MB offers a blend of efficiency and safety with its high-quality copper tank and anti-scald device. Perfect for energy-conscious users, it provides precise temperature control and a refreshing shower experience.
Key Features
High Quality Copper Tank: Durable copper construction ensures a longer lifespan.
Energy and Water Saving: Save on bills with efficient heating and 3-in-1 stop valve.
High Precision Power Selector: Easy control over water temperature for comfort.
Anti-Scald Safety Device: Prevents water from reaching scalding temperatures.
IP25 Splash Proof Rating: Protects internal circuits from water splashes.
Massage Shower Set: Enjoy a refreshing shower with a 5-way multi-massage set.
Product Specifications
Power Rating: 3.3kW, 230V, 50/60Hz (A/C)
Inlet & Outlet Water Connection: 1/2" BSP
Minimum Water Flow Rate: 3L/Min
Recommended Water Flow Rate: 4-6L/Min
Permissible Inlet Water Pressure: 0.1-0.3 MPa
Recommended Inlet Water Pressure: 0.1 MPa
Product Dimension: 310 x 200 x 85mm
Product Weight: 1.4kg
Warranty: 5 Years Warranty - Heater Tank, 2 Years Warranty - Heater Parts
Ideal For
The Champs Instant Water Heater Perry MB is ideal for modern households seeking efficient and reliable water heating solutions. Perfect for families and individuals who value energy savings and safety features.
Add to Wish ListS$159.00 U.P. S$249.00 9% OFF GST ABSORBED -
CHAMPS INSTANT HEATER LEGEND-GMLEGEND-GM
W/RAIN SHOWER SETProduct Description
The Champs Instant Heater Legend-GM is a top-tier choice for those seeking a reliable and efficient water heating solution. With its high-quality polymer tank, DC booster pump, and IP25 splash-proof design, this water heater ensures a safe and luxurious shower experience. Equipped with a rain shower set and a 3-way multi-massage hand shower, it offers a refreshing and customizable shower experience. Ideal for modern homes, it combines functionality with style.
Key Features
- High Quality Polymer Tank: Constructed to minimize heat loss, ensuring energy efficiency and durability for long-term use.
- DC Booster Pump: Enhances water pressure while maintaining energy efficiency, providing a powerful and consistent water flow.
- IP25 Splash Proof: Designed to protect internal circuits from water, ensuring safe and reliable operation in wet conditions.
- Luxurious Rain Shower Set: Equipped with a premium 3-way multi-massage hand shower for a refreshing and customizable shower experience.
- Double Pole Electricity Leakage Sensing Device (ELSD): Automatically cuts off power supply to prevent electrical hazards, ensuring user safety.
Product Specifications
- Energy Efficiency Rating
- Very Good
- Annual Energy Cost
- $61
- Annual Energy Consumption
- 228kWh
- Rated Input Power
- 3.3kW
- Capacity
- N.A
- Weight
- 3.5 kg
- Dimensions
- 26.3 x 14.5 x 62 cm
- Inlet & Outlet Water Connection
- 1/2" BSP
- Minimum Water Flow Rate
- 2L/Min
- Recommended Inlet Water Pressure
- 0.1 MPa
- Permissible Inlet Water Pressure
- 0.1-0.3 MPa
- Product Dimension
- 236 x 413 x 95mm
- Product Weight
- 1.7 kg
- Rated Input Power
- 3.3kW
- Warranty
- 5 Years Warranty – Heater Tank, 2 Years Warranty – Heater Parts
- Tested in accordance with
- SS646
Ideal For
The Champs Instant Heater Legend-GM is ideal for modern households seeking efficient and reliable water heating solutions. Perfect for families and individuals looking for a compact and energy-efficient water heater with advanced safety features.
Add to Wish ListS$439.00 U.P. S$549.00 9% OFF GST ABSORBED -
CHAMPS INSTANT HEATER SYLPHY SRSSYLPHY SRS
W/RAIN SHOWER SETProduct Description
The Champs Instant Heater Sylphy SRS is a cutting-edge water heating solution designed for modern homes. With its high precision power selector and double safety anti-scald device, it ensures both efficiency and safety. Its compact design allows it to fit seamlessly into any bathroom, while its energy and water-saving features help reduce utility bills. Backed by a 5-year warranty, this heater offers reliability and peace of mind.
Key Features
High Precision Power Selector: Easily adjust the power settings to suit your needs, ensuring optimal energy usage.
Double Safety Anti-Scald Device: Provides enhanced protection against accidental scalding, making it safe for all family members.
Energy and Water Saving: Designed to minimize energy and water consumption, contributing to lower utility bills.
IP25 Splash Proof: Offers protection against water ingress, ensuring durability and reliability.
Compact Design: Fits seamlessly into any bathroom space without compromising on performance.
5 Years Warranty: Enjoy peace of mind with a comprehensive warranty covering the heater tank and parts.
Product Specifications
Power Rating: 3.3kW, 230V a.c 50Hz
Weight: 2.85kg
Dimensions: 236 x 413 x 95mm
Water Connection: 1/2" BSP
Minimum Water Flow Rate: 2L/Min
Recommended Water Flow Rate: 4-6L/Min
Permissible Inlet Water Pressure: 0.1-0.3MPa
Recommended Inlet Water Pressure: 0.1MPa
Warranty: 5 Years Warranty - Heater Tank, 2 Years Warranty - Heater Parts
Features: High Quality Polymer Tank, High Precision Power Selector, Double Safety Anti-Scald Device, Energy and Water Saving, IP25 Splash Proof, Rain Shower Set
Ideal For
The Champs Instant Heater Sylphy SRS is ideal for modern households seeking efficient and reliable water heating solutions. Perfect for families and individuals who value energy efficiency and safety in their home appliances.
Add to Wish ListS$199.00 U.P. S$328.00 9% OFF GST ABSORBED -
RHEEM STORAGE HEATER 40L EHG-40S/WIFIEHG-40S/WIFI
HORIZONTALAdd to Wish ListS$438.00 9% OFF GST ABSORBED -
RHEEM STORAGE HEATER 25L EHG-25S/WIFIEHG-25S/WIFI
HORIZONTALAdd to Wish ListS$388.00 9% OFF GST ABSORBED -
-
RHEEM STORAGE HEATER 30L XC-30-CUBEXC-30-CUBE
XWELLAdd to Wish ListS$328.00 U.P. S$338.00 9% OFF GST ABSORBED -
RHEEM STORAGE HEATER 15L XC-15-CUBEXC-15-CUBE
XWELLAdd to Wish ListS$298.00 U.P. S$308.00 9% OFF GST ABSORBED
Key Features to Consider When Buying a Water Heater
Looking to buy a water heater in Singapore? Consider these key features:
Water Capacity
Determine the right tank capacity based on your household size and hot water usage to ensure everyone has enough hot water.
Energy Efficiency
Look for electric water heaters with high energy efficiency ratings to save on electricity bills and reduce your environmental impact.
Build Quality
Choose a water heater made from high-quality materials with a durable build to ensure long-lasting performance.
Safety Features
Prioritise water heaters with built-in safety features like overheat protection and automatic shut-off to prevent accidents.
Electric Water Heater Prices in Singapore
Electric water heater prices in Singapore vary based on type and capacity. Instant water heaters start from $100+, while tank water heaters range from $200 to $500 depending on size and features.
Please note that prices are subject to change based on current demand and availability.
Why Buy a Water Heater at Gain City?
Gain City is a trusted destination for water heaters in Singapore. Here’s why you should buy from us:
- Competitive pricing: Enjoy great value on popular electric water heater brands like Ariston, Fujioh, and more at unbeatable prices.
- Fast delivery: Get your order delivered quickly and reliably across Singapore.
- Comprehensive warranties: Shop with confidence knowing your purchase is backed by reliable warranty coverage.
Frequently Asked Questions About Water Heaters
Does an instant water heater use a lot of electricity?
Instant water heaters have high wattage but only consume electricity when in use. This means they can be more energy-efficient than storage water heaters, especially for smaller households with intermittent usage.
What capacity water heater do I need for my home?
The ideal capacity for an electric water heater depends on your household size and hot water needs. A general guideline is 25-35 liters per person, but other factors such as the flow rate of your shower head or whether you use a bathtub can affect the amount of water you need.
Is it safe to leave a water heater on all the time?
Yes, it is generally safe to leave a water heater on. Modern water heaters have thermostats that maintain the desired temperature and safety features to prevent overheating.
Do I need a pump for my water heater?
A pump is usually not necessary unless you have low water pressure or want to boost the flow rate for showers and other bathroom fittings. Consult a plumber to assess your water pressure and needs.