Under-Sink Hot Water Systems: Instant Hot Water for Kitchens and Bathrooms

Sick of waiting for the water to heat up? Struggling with clunky old tanks under your sink? An under-sink hot water system could be the upgrade your kitchen or bathroom needs. These compact units provide instant hot water exactly where you need it—saving time, water, and energy.

At JR Gas & Water, we supply and install premium Stiebel Eltron under-sink hot water systems across Brisbane and the Gold Coast. Whether you're renovating or simply want hot water on tap without the wait, we’ve got you covered.

What Is an Under-Sink Hot Water System?

An under-sink hot water system is a compact electric water heater that sits beneath your sink and delivers instant hot water at the point of use. Unlike bulky storage tanks or centralized systems, these units only heat water when needed—making them perfect for bathrooms, kitchens, butler’s pantries, office tea stations, and granny flats.

How It Works

Under-sink water heaters operate in two main ways:

• Instantaneous systems (like the Stiebel Eltron DHC) heat water as it flows through the unit—no storage, no waste.

• Compact storage models (like the Stiebel SNU 5 or SNU 10) preheat and hold a small amount of water ready to use.

Either way, you get hot water on demand—without long pipe runs or waiting for a central unit to kick in.

Top Benefits of Under-Sink Hot Water Heaters

✅ Instant Hot Water – No more wasted water while waiting for heat
✅ Energy Efficient – Only heats what you use
✅ Space-Saving – Fits neatly under the sink
✅ Reduced Utility Bills – No standby losses from stored water
✅ Ideal for Renovations or Remote Installs – Especially in detached areas or low-traffic zones

Why Choose JR Gas & Water?

🏆 Award-Winning Service – Named Best Plumbers Brisbane in 2023, 2024, and 2025
🛠 Expert Installation – We install Stiebel Eltron under-sink systems with full QBCC compliance
🧰 Tailored Solutions – Not sure what model suits you? We’ll match your water usage, sink location, and budget
🌏 Servicing Brisbane, Logan, Gold Coast & More – Local and ready to help

Best Stiebel Eltron Under-Sink Models (Available at JR Gas & Water)

1. Stiebel Eltron SNU 5 & SNU 10

🔹 Type: Compact storage
🔹 Capacity: 5L or 10L
🔹 Use Case: Ideal for vanities, office sinks, kitchens
🔹 Features:

• Adjustable temperature control

• Energy-efficient insulation

• Overheat and pressure protection

2. Stiebel Eltron DHC Series

🔹 Type: Instantaneous
🔹 Flow Rate: 2–5L/min
🔹 Use Case: Office tea points, studio kitchens, granny flats
🔹 Features:

• Compact tankless design

• Rapid heating

• Safety shut-off

3. Stiebel Eltron DHCE Series

🔹 Type: Instantaneous
🔹 Use Case: Ideal for bathrooms needing fast, consistent hot water
🔹 Features:

• Electronic temperature control

• Durable copper heating

• Sleek, efficient, space-conscious

💡 All models are hardwired and require professional installation. For same-day service or expert advice, contact our team.

Installation Checklist

• ✔ Suitable power supply (usually 240V, hardwired)

• ✔ Sufficient water pressure

• ✔ Compact cabinet space under sink

• ✔ JR Gas & Water installation for warranty compliance

How to Maintain Your Under-Sink System

🧽 Clean and flush annually – Prevent scale buildup
🔎 Inspect regularly – Look for drips, corrosion, or temperature fluctuation
🔧 Replace worn valves or heating elements – When needed, our team offers quick servicing

Frequently Asked Questions

Is an under-sink hot water system worth it?
Yes! It reduces wait time, saves energy, and is ideal for low-use or remote sink locations.

Can I install it myself?
No. Stiebel Eltron under-sink systems must be hardwired by a licensed electrician/plumber for warranty and safety compliance.

What size system do I need?
A 5L unit is ideal for handwashing and tea points. For small kitchens, a 10L or an instantaneous unit is best.

Can I use it in a bathroom vanity?
Absolutely. It's one of the most popular uses—especially in ensuites or powder rooms.

How fast does the water get hot?
Instant! There's no delay because the system is installed right beneath the tap.

Shop Stiebel Eltron Under-Sink Hot Water Heaters

We stock the full Stiebel Eltron range and provide expert installation across:

• ✅ Brisbane

• ✅ Gold Coast

• ✅ Logan

• ✅ Redlands

• ✅ Ipswich

Explore our systems:
🔗 Under-Sink Hot Water Systems
🔗 Stiebel Eltron Range

Upgrade Your Water. Upgrade Your Day.

No more cold surprises. No more clunky tanks. Just sleek, instant hot water at your fingertips—professionally installed by Brisbane’s trusted plumbing experts.

📍 Contact JR Gas & Water today or shop online to transform your water setup with a Stiebel under-sink solution.