Hot Water Installation & Replacement
Like-for-like replacements, fuel-type changeovers and brand-new installations, supplied, installed and certified by licensed local plumbers, usually on the same day.
How quickly can a hot water system be replaced?
Most standard replacements are done the same day you call. A straightforward like-for-like swap (same fuel type, same location) typically takes 2–4 hours on site, including removing the old unit, installing the new system with compliant valves, and commissioning it. Changing system type or location takes longer.
Installation & Replacement
Hot water installation done properly, the first time
Ready Plumbing supplies and installs every type of hot water system across the Northern Beaches and North Shore: gas storage, gas instantaneous, electric storage, electric instantaneous, heat pump, solar, stainless steel tanks and commercial systems. Owner-operated and local for 20 years, we install the brands we trust (Rinnai, Rheem, Everhot, Thermann and other leading manufacturers) and back every job with a lifetime labour guarantee.
A proper installation is more than connecting a tank. Every compliant hot water install includes the right tempering valve (which keeps delivered water at a safe temperature), pressure and relief valves, and correct drainage for the relief line. Cutting corners here is what turns into leaks, lukewarm water and failed inspections later.
Installation Day
What happens on installation day
Confirm the system and quote
We check the location, connections and any compliance updates needed, and confirm the fixed price.
Drain and remove the old unit
We take it away and dispose of it, so you don't need to do anything.
Install and connect
New system in place, valves replaced (not reused), connections made to water, gas or power as required.
Commission and certify
We fire it up, set the tempering valve, test for leaks, and complete compliance certification.
Walk-through
We show you how it works, what maintenance it needs, and when, such as the 5-yearly anode replacement on steel tanks.
Choosing What To Install
Choosing what to install
- Like-for-like replacement: cheapest and fastest. Right when your current system suited your household.
- Upsize: if you regularly run out of hot water, replacement day is the time to fix it. See what size hot water system you need.
- Change system type: switching to instantaneous frees up space and ends “running out”; switching to a heat pump cuts running costs substantially, with rebates available. Our gas vs heat pump comparison covers the trade-offs.
- Stainless steel tanks: if you’re staying with storage, stainless tanks resist corrosion and don’t depend on the anode replacement that glass-lined steel tanks do. We recommend them often for local homes.
Why Choose Us
20 years installing hot water on the Northern Beaches
Owner-operated, 20 years local
We've supplied and installed hot water systems across the Northern Beaches and North Shore for two decades.
Brands we trust
Rinnai, Rheem, Everhot, Thermann and other leading manufacturers, not whatever's on special.
Done to the compliance standard
Tempering valves, pressure and relief valves, and correct drainage on every job, not cut corners.
Lifetime labour guarantee
Backed on every installation we complete.
Not Sure What You Need
Not sure? Start here
Compare the options on our hot water overview, or just call and we’ll recommend what we’d put in our own home for your situation.
Last reviewed: 8 July 2026 by the Ready Plumbing team.
FAQ
Hot Water Installation: your questions answered
Plumbing problems can be extremely frustrating. Our licensed Sydney plumbers are here to provide fast, reliable answers and solutions.
Do you supply the hot water system or do I buy it myself?
Either works, but we recommend letting us supply it. We install trusted brands like Rinnai, Rheem, Everhot and Thermann at trade pricing, we know which models hold up, and the whole job (unit + installation + labour guarantee) sits with one company.
Can I switch from electric storage to gas or a heat pump?
Usually, yes. Switching fuel type involves extra work, such as gas line sizing for continuous flow, or a power circuit and airflow space for a heat pump, and we'll quote it up-front. Heat pump changeovers can attract government rebates that offset much of the difference.
What's included in your installation price?
Removal and disposal of the old unit, the new system, all required valves (tempering, pressure limiting, duo valves as applicable), connection, testing, and certification of the work. We quote the full job before we start.
Where can a hot water system be installed?
Storage tanks need a stable base with drainage nearby; instantaneous units mount on an external wall (or internally with flueing); heat pumps need airflow around the fan unit. If your current spot isn't compliant, we'll tell you what is, since regulations around relief drains and tempering valves have tightened over the years.
Do you install commercial hot water systems?
Yes, from multi-level buildings and salons to backpackers and large multi-bank installations, plus reticulated hot water systems. We design the system around your peak demand.
Guides & Real Jobs
Helpful reading from our plumbers
Guide
Gas vs Heat Pump Hot Water: What's Cheaper to Run?
Replacing a hot water system and stuck between gas and a heat pump? Here's how the running costs, upfront prices and rebates actually compare for Sydney homes.
Guide
Signs Your Hot Water System Is Failing
We keep hearing the same question from clients across the Northern Beaches and North Shore: what are the signs of a failing hot water system? Here's what 20 years of call-outs has taught us to look for.
Guide
What Size Hot Water System Do I Need?
Undersize a hot water system and the last shower runs cold; oversize it and you pay to heat water nobody uses. Here's how to size storage tanks and continuous flow units properly.
Case Study · Dee Why
No Hot Water in Dee Why: Fixed Within the Hour
A Dee Why home lost hot water when their gas system wouldn't re-ignite. Our emergency call-out found a failed thermocouple and had hot water back within the hour.
Get In Touch
Contact Your Local Plumber in Sydney
Ready Plumbing is a Sydney-based and fully-licensed plumbing business with more than 20 years of experience, offering a range of residential and commercial plumbing solutions and emergency plumbing 24/7. Get in touch and we'll respond promptly.
Free Quick Quote
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