Storage

A storage water heater (tank heater) keeps a tank of water hot and ready, so the moment you turn on a tap you get strong, steady hot water. It can serve a single bathroom or feed several outlets at once, which makes it the practical choice for families. At Big Bath our storage heaters come in capacities from 40 to over 100 litres, across 10 showrooms nationwide.

Why Choose a Storage Water Heater?

Steady, Strong Pressure

Because it stores hot water under pressure, a tank heater delivers a full, steady flow even where mains pressure is modest — better than some instant heaters.

Multiple Outlets

One storage tank can feed several taps or showers at once, so it suits a family bathroom better than a single-outlet instant heater.

Works at Lower Pressure

Unlike an instant heater, a storage tank does not need a minimum flow to heat — handy where water pressure is uneven.

How to Choose the Right Storage Water Heater (Quick Checklist)

1. Size the tank. Rough guide: 40L for 1–2 people, 50–60L for a small family, 80–100L+ for a large family or a bathroom with a bathtub.
2. Vertical or horizontal. Vertical tanks are more efficient; horizontal tanks fit where height is tight — pick what your space allows.
3. Count your outlets. A bigger tank suits a bathroom feeding several taps or a rain shower plus basin.
4. Safety features. Look for a pressure relief valve, auto cut-out and an enameled or glass-lined tank to resist corrosion.
5. Use a qualified installer. Tank heaters mix plumbing and electrical work — our team fits them safely.

Storage Water Heater Features to Look For

• Right tank capacity — matched to your household.
• Pressure relief valve — safe operation.
• Auto cut-out — shuts off on overheating.
• Glass-lined / enameled tank — resists corrosion for a longer life.
• Vertical or horizontal — fits your installation space.

Related Categories

• All Water Heaters — the full heater range.
• Instant Water Heaters — tankless heaters.
• Solar Water Heaters — solar hot-water systems.
• Bathtubs — deep soaks need a big tank.
• Rain Showers — showers to pair.

Frequently Asked Questions

What is a storage water heater?

A water heater that keeps an insulated tank of water hot and ready, so you get strong, steady hot water the moment you turn on a tap. It is also called a tank heater.

Instant or storage water heater — which is better?

A storage heater delivers steadier pressure, works at lower mains pressure, and can feed several outlets — best for families. An instant (tankless) heater is more compact and never runs out, but usually serves one outlet and needs steady pressure. For a family bathroom, storage is usually the better pick.

How big a storage water heater do I need?

As a rough guide: 40 litres for 1–2 people, 50–60 litres for a small family, and 80–100 litres or more for a large family or a bathroom with a bathtub. A tank that is too small runs cold mid-shower; one that is too big wastes energy keeping extra water hot.

Will a storage heater run out of hot water?

It can — the tank holds a fixed volume, so a long shower or two showers back-to-back can empty it, and you then wait for it to reheat. Size the tank to your household to avoid this, or pair it with a solar system for a larger supply.

Vertical or horizontal storage heater?

A vertical tank heats more efficiently (hot water rises naturally). A horizontal tank fits where ceiling height is tight, such as under a low false ceiling. Choose based on your installation space.

Do storage heaters waste electricity on standby?

They do lose some heat through the tank walls (standby loss), so they cost a little to keep warm all day. A well-insulated tank and sizing it to your real use keeps that loss small. For the lowest running cost, choose solar.

Do you deliver and install storage water heaters?

Yes. Big Bath has 10 showrooms nationwide and in-house installers across Peninsular Malaysia, with ready stock in Kota Kinabalu (Sabah) and Kuching (Sarawak). WhatsApp your nearest branch.