Are you sick and tired of having a hot water system that just can’t keep up with your daily demands? Whether it’s inconsistent water temperature, frequent breakdowns, or low pressure, a hot water system can cause frustration for any household or business.
Households continue to struggle with outdated systems, wasting energy and paying for temporary fixes that never address the real problem. With our busy lifestyles, we all deserve a reliable, consistent hot water supply to make life easier. At GRH Plumbing Group, we understand the importance of having a reliable hot water system and are a proud supplier of Rinnai hot water systems..Our skilled plumbers specialise in all makes and models of Rinnai and deliver fast and effective installation services for Sydney homes and businesses.
Whether you need a new hot water installation, a replacement, an upgrade, routine maintenance or emergency repairs, call GRH Plumbing today on 1300 643 850
Rinnai is a leader in high-quality, energy-efficient hot water systems and is a trusted brand for many Australian households and businesses. Known for their durability and advanced technology, Rinnai hot water systems offer consistent and cost-effective water heating. Whether you’re installing a new Rinnai water heater or require repairs, we offer solutions that cater to your hot water demands and budget.

Gas hot water storage tanks are known for their quicker heat recovery than the electric storage models. You can choose LPG or natural gas depending on your access to a gas supply. Model sizes are a little more limited than the electric storage range and come in 145L or 170L storage capacity. Available with a solar booster if required.
Heat pumps utilise energy from the environment. They work on a similar basis to a refrigerator, which uses the air temperature to create cooling. The super-efficient heat pump water heater uses ambient air temperatures to create hot water. This makes them extremely cost-effective and more environmentally friendly. Available in 180L, 215L, 250L, 265L and 315L models
Also known as instantaneous hot water, Rinnai's continuous flow water system provides an abundant, never-ending supply of hot water. Continuous flow heaters have an Energy Star rating between 6 and 7, boasting low-emission burners. Rinnai continuous flow systems are compact, making them ideal for small spaces
Solar hot water heating is renowned for being eco-friendly, as it utilises the energy from the sun to heat water. Households with solar enjoy the feeling of independence that comes with generating hot water from a natural source and low running costs. Having an energy booster installed will give you added peace of mind if your solar is lacking power.
There is an electric storage hot water system to suit any household with an extensive range of models from the small 25L model that is perfect for discreet installation either under a sink or in a laundry. The sizes increase based on your household requirements, up to 400L to accommodate high-volume households.

At GRH Plumbing, we supply and install Rinnai hot water systems for new builds or replacements for existing properties. Our installation is second to none; we deliver prompt and effective installation, ensuring optimal position for both instant and storage systems. Whether it's best to be installed internally or outdoors, we ensure optimal positioning. From helping you select the right Rinnai hot water model to delivering a flawless installation, our team will ensure your system operates at peak efficiency. We also take care of tempering mixing valve (TMV) installation and adjustments to ensure your water temperature is safe and won't cause nasty scalds. Our installation process
✔️Assessment: Our team assesses your home’s hot water needs.
✔️Model Selection: We help you choose the best Rinnai system, from the popular Rinnai B16 to the versatile Rinnai Infinity 16.
✔️Installation: Our licensed plumbers install your new hot water system efficiently and securely.
✔️Testing: We test your system to ensure consistent, high-performance hot water.
Choosing the right size Rinnai hot water system is crucial for ensuring you have enough hot water for your household or business without wasting energy. Our team can help assess your specific requirements and recommend the most suitable Rinnai hot water system. We'll take the time to understand your usage patterns and lifestyle, ensuring you get a system that delivers optimal performance and energy efficiency. Consideration is given to your home or workplace size, how many people, including your peak hot water usage times. Don't hesitate to contact us for expert advice and a free quote on a new Rinnai hot water system on 1300 643 850
Regular servicing is essential to keep your hot water system performing at its best. We provide comprehensive Rinnai hot water servicing across Sydney, helping extend the life of your water heater and reducing the likelihood of breakdowns. With regular serving and maintenance, our plumbers can identify and resolve issues before they erupt, causing inconvenience and the need for costly repairs.
If you’re having trouble with your Rinnai hot water system, our team can resolve most issues on the spot. If your system is an older model and has seen better days, a replacement may be a more practical and cost-effective option than ongoing repairs. Our plumbers offer honest advice and recommendations to help you make a well-informed and cost-effective decision. We offer same-day service and are available 24/7 for any hot water emergencies. Common issues we typically attend to include.

Continuous Flow Systems: Also known as instantaneous, they provide hot water on demand and are optimised for energy efficiency.
Gas Storage Water Heater: Both LPG and natural options are ideal for larger households with high hot water needs.
Electric Storage Water Heater: A great option when a natural gas connection is not available.
Enviroflo Heat Pump: A green solution that utilises ambient air for water heating, reducing electricity consumption.
Rinnai Infinity Models: Top-quality continuous flow water systems known for durability and consistent hot water delivery.
At GRH Plumbing, we know that hot water emergencies never happen at a good time. That’s why our team offers 24/7 emergency repairs for all Rinnai hot water systems. No matter if it’s late at night, early morning, or over the weekend, we’ll have your hot water back up and running fast. Whether it’s at home or your workplace, you can count on our prompt and reliable service to restore your hot water as quickly as possible
GRH is committed to delivering professional, high-quality plumbing services designed specifically for Sydney residents. We know how essential your hot water system is to your daily comfort, not only at home but also in the workplace. Our priority is to keep it operating efficiently and reliably with no exceptions. With expert workmanship and outstanding customer service, we ensure you’re completely satisfied with both your Rinnai hot water system and your experience with our team.
✔️Licensed & Insured Technicians
✔️Transparent Pricing & Honest Quotes
✔️Local Expertise and Knowledge
✔️Superior Products & Exceptional Service
✔️Quality Guaranteed
✔️Discounts Available for Senior Customers

Need Rinnai hot water installation, servicing, or repairs? We have you covered. GRH Plumbing is the expert when it comes to Rinnai hot water systems. Call us today on 1300 643 850 or submit an online enquiry form, and we will be in touch