uniSTOR standard diameter range

Launching 1st September 2025

uniSTOR pure & uniSTOR plus high recovery cylinders
Pre-plumbed options available
25-year guarantee on the stainless steel inner tank
Choice of internal or external expansion
Improved re-heat times and system efficiency

Overview

Range overview

Vaillant has expanded its portfolio to further support our customers' needs, delivering the ultimate hot water solution for your end customers. This new standard diameter cylinder is an extension to the recently launched slimline cylinder range. With 14 slimline variants and 20 standard variants, this extensive range now offers capacities ranging from 90L up to 300L.

Our new, cutting-edge range of high recovery cylinders have been designed with efficiency and simplicity at the heart of our latest innovation. Experience increased performance with a larger, high recovery coil and faster installation with time saving features like labelled and front facing connections. This standard diameter cylinder range is crafted to ensure a flawless fit first time, every time.

Compatible with all Vaillant domestic boilers and heat pumps, our range includes internal and external expansion options to support the varied requirements of you and your customers, along with a patented stackable buffer to reduce the overall footprint of the installation.

What is a high recovery cylinder?

Features and benefits

Wider range - With capacities of 150, 175, 210, 250 and 300 litres, the range suits all house types and hot water demands. All are available in a choice of both pre-plumbed and standard models.
Diameter options - A choice of 580mm diameter when space is not such a challenge. In addition, two new capacities are added to the range at 250L and 300L.
Purpose built buffer - The cleverly designed and patented buffer is awarded its patent due to the unique locking feature which ensures all pipework face frontwards and can be installed above or below the cylinder.
25-year guarantee - 2-year parts and labour guarantee, with a 25-year anti-corrosion guarantee on the internal stainless-steel tank.
uniSTOR plus internal expansion vessel - Quick to install, the neater appearance maximises space in tight installation spaces.
Support and knowledge from Vaillant - A range of tutorial videos to successfully support installation and maintenance.
Improved re-heat times and system efficiency - Large coil surface area maximises heat transfer to ensure connected Vaillant systems run at their optimum efficiency, reducing running costs with increased hot water performance.
Front facing connections and pipework - Easy to connect pipework when working in tight spaces reducing time during installation.
Labelled connections for simplicity - Easy-to-recognise, giving onsite guidance for installation and maintenance.

Specifications


uniSTOR pure
Technical data	Unit of measure	150l	150l pre-plumbed	175l	175l pre-plumbed	210l	210l pre-plumbed	250l	250l pre-plumbed	300l	300l pre-plumbed
Article number		800011512	800011517	800011513	800011518	800011514	800011519	800011515	800011520	800011516	800011521
Outer diameter with insulation	mm	580
Height with insulation	mm	1144		1304		1549		1804		2029
Net weight empty cylinder	kg	43	48	48	53	53	58	63	68	69	74
Total tank capacity	l	153.84		179.14		207.56		258.16		288.46
Hot water capacity/draw off* (V40)	l	193.8		224.8		225.75		317.7		354.9
Standby losses	kWh/24h	1.32		1.39		1.70		1.69		1.80
Reheat time (100%)*	Minutes	19.95		23.65		21.18		25.22		28.15

uniSTOR plus
Article number		8000012315	8000012320	8000012316	8000012321	8000012317	8000012322	8000012318	8000012323	8000012319	8000012324
Outer diameter with insulation	mm	580
Height with insulation	mm	114		1304		1549		1804		2029
Net weight empty cylinder	kg	44	49	48	53	53	58	62	68	68	73.2
Total tank capacity	l	145.73		168.44		203.26		239.56		270.16
Hot water capacity/draw off* (V40)	l	190.45		220.3		250.5		310.1		347.4
Standby losses	kWh/24h	1.27		1.35		1.45		1.49		1.68
Reheat time (100%)*	Minutes	18.85		21.35		19.55		23.5		26.3

For full technical specifications, please review to the brochure.

Downloads

Brochure

Vaillant specification range brochure

Size: 19.24 MB

Operating, installation and maintenance instructions

allSTOR plus operating instructions

Size: 295.83 KB

Operating, installation and maintenance instructions