Hot Water Drain Line To Approved Discharge Point

A hot water drain line is an important add-on for storage hot water system installations where the expansion control valve, pressure relief valve or safe tray drain needs to discharge water to an approved location.

During normal operation, storage hot water systems can release small amounts of water through the relief or expansion valves as the water heats and expands. This water must not simply run onto the ground, against the slab, into garden beds or across termite management systems. It should be directed to an approved discharge point such as sewer, stormwater, a compliant rubble pit or another suitable discharge location confirmed during installation.

This add-on service is for running a drain line from the hot water system to an approved discharge point as part of an eligible hot water installation.

Why A Drain Line May Be Needed

Storage hot water units naturally create expansion water as part of normal heating. Depending on the system, site layout and valve arrangement, this water may come from the expansion control valve, temperature pressure relief valve or safe tray drain.

If this water is not managed correctly, it can cause issues around the installation area, including:

Water pooling around the base of the hot water system

Moisture against walls, slabs, pathways or foundations

Water discharging into garden beds or soft ground

Dilution or disturbance of termite barriers and treated zones

Staining, mould or damp areas near the unit

Uncontrolled runoff across outdoor areas

A correctly run drain line helps move this discharge water away from the unit and toward a suitable approved location.

Approved Discharge Points

Drain lines must be run to an approved discharge point. Depending on the property, this may include:

Sewer drainage

Stormwater drainage

A compliant rubble pit

An existing approved tundish or drain point

Another suitable discharge point confirmed by the installer

The correct option depends on the property layout, local requirements, access, ground conditions and the location of the hot water system. The installer will assess the site and determine whether the selected discharge point is suitable.

Important Termite Barrier Note

Hot water discharge water should not be left to run continuously into soil, garden beds or directly around the building perimeter. In some properties, this can affect termite management zones or dilute treated areas if the water is not directed correctly.

Where a termite barrier, treated zone or termite management system may be present, the drain line should be positioned so discharge water is directed to a suitable approved location rather than soaking the area around the slab or external wall.

What This Add-On Includes

Running a drain line from the hot water system area to a suitable approved discharge point

Connection to the relevant hot water valve where required

Basic pipework and fittings needed for the drain line run

Installer assessment of the most suitable nearby approved discharge point

Neat routing where practical based on site access and layout

What Is Not Included

This add-on does not include major excavation, concrete cutting, core drilling, trenching, new sewer or stormwater works, pump systems, electrical work, termite treatment, repairs to existing drainage, landscaping, reinstatement work or concealed pipework unless specifically quoted and approved.

If the site requires additional work beyond a standard drain line run, this can be assessed during installation and quoted separately where available.

Installation Only Add-On

This product is an add-on service only and must be purchased with an eligible supplied-and-installed hot water system installation. It is not available as a standalone supply-only product.

Suitability

This add-on may be suitable when:

The new hot water system needs a relief valve, expansion valve or safe tray drain connected to a discharge point

The existing drain line is missing, damaged, poorly positioned or non-compliant

Water currently discharges onto the ground, garden bed, slab edge or near a termite barrier

The new installation location requires a drain line to be run to sewer, stormwater or a rubble pit

The installer determines that a new or improved drain line is required for the installation

Final site suitability

Final suitability depends on the property layout, available discharge points, access, existing plumbing and local compliance requirements. The installer will confirm the best practical option during the installation.

Tempering Valve and Element Information

*Element size information:
All electric hot water units are supplied as standard with a 3.6kW element unless otherwise stated on the product page, invoice, or order confirmation.

If a different element configuration is requested, such as 1.8kW or 2.4kW, the hot water unit may still arrive with the standard 3.6kW element fitted from the manufacturer. The requested 1.8kW or 2.4kW element will be supplied separately with the order for installation by a suitably licensed electrical contractor or licensed electrical licence holder.

Any element changeover, electrical connection, disconnection, wiring, testing, or modification must be carried out by a licensed electrical contractor or licensed electrical licence holder. Elements must not be changed, connected, modified, or tested by an unlicensed person.

Alternative elements supplied for non-standard configurations may be generic replacement elements and may not be the same brand as the hot water unit unless specifically stated. Generic elements are supplied to suit the requested element size and electrical configuration, but final suitability must be checked by the licensed installer before installation.

1.8kW and 2.4kW elements supplied separately with a hot water unit include a 12-month supply-only parts warranty from the date of purchase, provided the element has been correctly installed by a licensed electrical contractor or licensed electrical licence holder and used under normal operating conditions.

This element warranty covers the replacement supply of the element only. It does not include labour, call-out fees, electrical work, plumbing work, fault finding, removal, reinstallation, testing, travel, downtime, damage caused by incorrect installation, or any other associated costs. Warranty may be declined where the element has been incorrectly installed, dry-fired, modified, damaged, connected to incorrect voltage or wiring, affected by power issues, used in unsuitable water conditions, or installed by an unlicensed person.

Proof of purchase, installer details, electrical licence details, photos, and/or return of the faulty element may be required before a warranty claim is approved.

**Tempering valve information:
Where a hot water system is capable of delivering water above 50°C, a compliant tempering valve must be installed to control the temperature delivered to personal hygiene fixtures such as showers, baths, basins, and bathroom outlets. This helps reduce the risk of scalding and assists with meeting plumbing compliance requirements.

A tempering valve blends hot and cold water to deliver a safer controlled outlet temperature to required fixtures. The hot water unit itself may store water at a higher temperature, but the water delivered to personal hygiene outlets must be controlled where required by plumbing regulations.

If your property already has a suitable, compliant tempering valve installed, your licensed plumber can assess whether it is appropriate for use with the new hot water system. Existing valves may not always be suitable due to age, condition, compliance requirements, valve type, location, or system compatibility.

If a compliant tempering valve is not already installed, or if the existing valve is unsuitable, one must be supplied and installed by a licensed plumber as part of the hot water installation.

Tempering valves are not automatically included with every supply-only hot water unit unless specifically selected, listed as included, or purchased as part of a suitable valve kit. If a tempering valve is required, please purchase the appropriate valve kit with your order or arrange for your licensed installer to supply and install the correct tempering valve on site.

It is the customer’s responsibility to ensure the installation is completed by appropriately licensed trades and that all required valves, fittings, electrical work, plumbing work, and compliance requirements are allowed for as part of the installation.

Hassle-Free Installation – Done Right by Trusted Experts

Need professional installation? We’ve got you covered! Our optional installation service connects you with our network of certified, trusted contractors, ensuring a smooth and stress-free setup.

How It Works:

🔹 Step 1: Select Installation Service
Choose to include professional installation when purchasing your new system.

🔹 Step 2: Pay for Installation Upfront
Simply add the installation service prior to adding your product to cart —no hidden fees, no surprises.

🔹 Step 3: We Assign a Certified Contractor
We’ll match you with a licensed, experienced contractor from our network to handle the installation.

🔹 Step 4: Schedule Your Installation
The assigned contractor will contact you directly to arrange a convenient time for installation.

🔹 Step 5: Direct Support When You Need It
For any installation-related questions, your contractor is your first point of contact. If any issues arise, our team is here to help.

🚨 Please Note: Installed Today supplies the product and connects you with a certified contractor for installation.

We’re committed to delivering top-quality products and facilitating a seamless installation experience. Have product questions? Reach out to us anytime! 🔥

Buying a new hot water system, water filter, pump or plumbing product should be simple. Installed Today helps you compare the product, the supply-only price and the available installation options in one place, so you can choose what suits your home, budget and timing without the back and forth.

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Installation Add-Ons Available

Where relevant, you can add common installation extras such as valve kits, bases, electrical options, removal, access-related items or other site-specific upgrades before checkout.

Built Around Brisbane and Gold Coast Homes

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Important Note

Installation availability, inclusions and add-ons vary by product type, site access, existing services, selected options and your property requirements. Some installations may require additional work, upgrades or checks before the job can proceed.

Fast & Reliable Delivery – What to Expect

Same Day Delivery: Available in Brisbane and Gold Coast on select units ordered before 8:00am
Express Delivery: 1–4 business days
Standard Delivery: 2–8 business days

Same Day Delivery

Same day delivery is available for selected hot water systems in Brisbane and Gold Coast metro areas when ordered before 8:00am, subject to stock availability, delivery capacity and suitable transport conditions.

Fast Metro Delivery

Most hot water orders in metro areas are delivered quickly, with around 90% arriving within 1 business day.

Weather Delays

Hot water systems cannot always be transported safely by courier during rain. Delivery timeframes may be affected when wet weather impacts safe handling, loading, unloading or transport conditions.

Express Delivery Guarantee

If your express delivery order takes longer than 1–4 business days, we will adjust the delivery timeframe to our standard 2–8 business days and refund your express shipping charge automatically.

Order Tracking

We will send your delivery details as soon as your order has been dispatched.

Need help with your delivery? Contact our team and we’ll be happy to assist.