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Reverse Osmosis Extra / Spare Water Storage Vessel Tank 12L

A High Quality, Fully-Tested Product

Brand New. Straight From The Factory

Full Fitting Instructions Provided

Easy Installation - Friendly Support

Todays Price
£67.00INC VAT
In stock | Only 31 left at this price | Next Day Delivery
Free Delivery & Returns
Order before 3pm for same day dispatch today

"I always buy my water filters from this company. Price is good along with delivery. Good communication throughout. Brilliant company. I wouldn’t shop anywhere else."

C Andrews
UK Water Filters Promise
If you change your mind about your purchase, for any reason, within 90 days, you can return your product for a full and complete refund. PLUS we will pay for your return postage (UK)

All orders shipped same day before 3pm

Free Delivery & Free Returns

(We’ll even pay your postage!)

3 Year full parts warranty

What you get
Product Description

12 Litre Reverse Osmosis Water Storage tank

Free standing, connects to your RO unit by tube.

Includes free in/out valve / for 1/4 inch OD tubing

The unit can be placed several yards away from the RO system.

Auto shut-off/on when full

Note: 12L size is based on the actual external volume of the tank - not the amount of water it holds when full.

The internal bladder that holds the water inside of the tank will actually hold between 5 to 9 litres of water (This depends on your incoming water pressure).

If you need more water to be held in reserve you can easily twin these tanks together - using simple "T"s - which we can supply.

Or if you prefer a bigger tank we have them for you!

Product Code: RO-TANK-12L

Reverse osmosis tank standard 12 litres
Technical Information

RO Storage Vessel Dimensions

420 mm High x 280 mm wide

This storage vessel can be placed several yards from the RO unit.

Depending on distance between tank and the RO system and your local water pressure a small pump might be required. The easiest way to find out is to fit it and see if you are happy with the flow rate from the tap. If not you could retro-fit a pump.

About the Materials Inside this Reverse Osmosis Tank

Made from highly durable steel. This is the external casing which the water doesn't touch.

Instead, the RO purified water is stored inside an airtight rubber bladder / diaphragm.

The diaphragm is made from "butyl rubber" which is lined with polypropylene - a commonly used food grade plastic (see "Hazard data" below).

All these materials are industry standard. We have never come across and other type of materials for Reverse Osmosis storage tanks - and, collectively, we've been in water filtration for over 50 years.

(Bear in mind that after leaving the tank the water is purified even further by the post filters).

Polypropylene Hazard Data:

No negative health effects and symptoms.

No negative physical and chemical effects.

No hazard for environment.


ESIS European Chemical Substances Information System.

Hazardous Substance Data Bank (HSDB) U.S. National Library of Medicine, 2001-1


With FREE Delivery

Immediate Dispatch

Purchase with Total Confidence

Money Back Guarantee

Click here for delivery information

No hidden extras

If you don't like what you get, send it back for a full no quibble refund.

If for any reason you decide to return your purchase we promise you a no questions asked THREE MONTH Money Back Guarantee. Click here to read the "large print" about our Money Back Guarantee.

PLUS We'll even pay your return postage !

Please order now to secure today's sale price.

Delivery & Returns

Free Second Class - up to 5 days (90% arrive in 3 days)

First Class - up to 2 days (95% next day delivery)

Free Returns and Money Back Guarantee. Full details

Free Lifetime Support

If you have any problems

... or concerns with your purchase we are here to help.

We are not "here today gone tomorrow" merchants.

A quick look at our Customer Feedback

... and our Money Back Guarantee should help reassure you that we are an honest firm who will give you a first class, long term service.

How to get help

Call our help line on 020 8761 6611 at any time during UK office hours ie 9 am to 6 pm

Or email us for a rapid response.

Our policy is always to get back to you within an hour - or one working day at most.


In addition to your 3 Year Warranty, if for any reason you change your mind about your purchase within 90 days of receiving the goods, you can return your product for a full and complete refund *

PLUS we will pay for your return postage (UK only)

*This applies to individuals/ consumers using the products in domestic settings. Businesses please see our terms and conditions

Delivery Times

Order before 3 pm on any working day and we guarantee your order will be sent out the same day (not on weekends)

(To be honest we often manage to send them even after 3pm. But we can't promise that).

All prices on the website include delivery charges and VAT except where stated otherwise.

Delivery Charges

Your Standard "Free Delivery Included" is Second Class

This usually takes between 3 to 5 working days ie does not count weekends or Bank Holidays

Pay Extra for First Class

You also have the option at checkout to pay extra for First Class.

This should result in next day working delivery to mainland UK.

BUT please note while 95% do arrive next day this is not guaranteed.

However arrival within two working days is almost certain.

You can see your delivery costs at the checkout stage before you buy.


Over 30,000+ happy customers

The great majority keep coming back for years because they like our friendly, helpful service and great value prices.

Free Delivery & Returns

All Orders Shipped Same Day Before 3pm

3 Year Full Parts Warranty