Wash Water OPTIH2O Reverse Osmosis Filters and Boiling Water Tanks: A Complete Guide

Are you looking for a better way to enjoy filtered drinking water at home, or would you like instant hot water without waiting for a kettle to boil? Wash Water offers a range of drinking water products designed to make everyday life more convenient, including reverse osmosis water filters, drinking water taps and innovative boiling water systems.

One product worth exploring is the Wash Water OPTIH2O, an integrated reverse osmosis water purifier and boiling water system designed to provide purified cold water alongside hot and near-boiling water from a specialist kitchen tap.

In this guide, we explain how Wash Water drinking water filters work, what makes OPTIH2O different, what to look for when buying a boiling water tank, and how to choose the right system for your kitchen.

We also look at whether Plumb Warehouse is a good company to buy Wash Water products from.

What Is Wash Water OPTIH2O?

Wash Water OPTIH2O is an integrated drinking water purification and boiling water system that combines reverse osmosis filtration with an under-sink hot water unit.

Rather than installing a separate drinking water filter and a conventional boiling water tank, OPTIH2O brings these functions together in one system.

According to Wash Water, the system provides purified cold water and adjustable hot or near-boiling water, with temperature settings ranging from 37°C to 98°C. It is designed to work with a choice of compatible electronic or four-in-one Multiflo taps.

Key features include:

• Integrated reverse osmosis water purification.
• Purified cold water and adjustable hot or near-boiling water.
• A five-in-one MOR filtration cartridge.
• A stated cartridge replacement interval of approximately 12 months, subject to actual usage and the manufacturer’s guidance.
• Remineralisation intended to improve the taste of purified water.
• A child safety lock for boiling water operation.
• A choice of compatible tap designs and finishes.

These features make OPTIH2O worth considering for homeowners who want filtered drinking water and convenient hot water from a single kitchen installation.

You can explore the product on the official Wash Water OPTIH2O page.

How Does a Reverse Osmosis Drinking Water Filter Work?

One of the most common questions people ask when researching drinking water filters is: What is reverse osmosis, and why would I want it in my kitchen?

Reverse osmosis, often shortened to RO, is a water purification process that uses a semi-permeable membrane to separate water from many dissolved substances and other impurities.

Water passes through a series of filtration stages before reaching the reverse osmosis membrane. The precise performance depends on the membrane, the other filter stages, the incoming water quality and the system’s operating conditions.

Reverse osmosis can reduce a broad range of dissolved substances, making it an option for people who want more comprehensive filtration than a basic taste-and-odour filter may provide.

Wash Water’s OPTIH2O combines this technology with its integrated hot water system, so the same under-sink installation can provide both purified drinking water and hot water on demand.

What can a reverse osmosis water filter remove?

The substances reduced depend on the particular system and its certified or tested performance. Reverse osmosis systems can reduce many dissolved salts and certain contaminants, while additional filtration stages may target substances such as chlorine and organic compounds.

Wash Water describes OPTIH2O as designed to reduce substances including chlorine, PFAS, herbicides, pesticides and other unwanted compounds, as well as addressing taste and odour.

If you are buying a water filter to address a particular contaminant, check the manufacturer’s technical documentation for the specific reduction claims and supporting test data. No single filter should automatically be assumed to remove every possible contaminant.

It is also important to remember that mains drinking water in the UK is subject to regulatory quality standards. A home filtration system is a choice for people seeking particular filtration characteristics, taste preferences or added convenience; it is not automatically necessary for every household.

A Closer Look at Wash Water Drinking Water Filters

Choosing the right drinking water filter involves more than comparing prices. You should consider the filtration technology, what it is designed to reduce, how much water you use and the ongoing cost of replacement cartridges.

Wash Water offers different types of drinking water products, including reverse osmosis purifiers and drinking water filters that can be paired with compatible taps.

1. Reverse osmosis filters

Reverse osmosis is worth considering if you want a more comprehensive filtration process capable of reducing a broad range of dissolved substances.

The OPTIH2O uses an integrated reverse osmosis arrangement, allowing filtered cold water to be supplied alongside its hot water functions.

This can be particularly attractive if you are renovating a kitchen and want to avoid having several separate appliances under the sink.

2. Multi-stage filter cartridges

Multi-stage cartridges combine different filtration media or processes within a single replaceable unit.

Wash Water specifies a five-in-one MOR cartridge for OPTIH2O, designed to support its integrated water purification process. The company states a 12-month cartridge life, although actual replacement requirements can vary with water quality and consumption.

Before buying any drinking water filter, check:

• The exact replacement cartridge model.
• The manufacturer’s recommended replacement interval.
• The cost and availability of replacement cartridges.
• The filter’s stated contaminant-reduction performance.
• Whether the system needs flushing or other routine maintenance.

A water filter only continues to perform as intended when it is maintained according to the manufacturer’s instructions.

3. Remineralisation filters

Reverse osmosis can remove minerals naturally present in water as well as unwanted dissolved substances. Some systems therefore include a remineralisation stage to add selected minerals back into the treated water.

Wash Water states that OPTIH2O remineralises purified water to help optimise taste and pH balance.

This may appeal to people who prefer the taste of remineralised water. However, remineralisation should not be confused with a guarantee of additional health benefits, and the resulting mineral content depends on the system’s design.

4. Drinking water filters with a dedicated tap

Not everyone needs a combined boiling water system. If your main priority is improving the taste of drinking water, a dedicated filtered water tap or a compatible under-sink filtration system may be sufficient.

A separate drinking water tap provides filtered water through its own outlet. Some kitchen systems instead combine several functions in one tap, depending on the product design.

The right option depends on your budget, available cupboard space, existing plumbing and whether you want filtered cold water only or both filtered and hot water.

Is Wash Water OPTIH2O Better Than Buying a Separate Water Filter and Boiling Water Tank?

This is an important question if you are comparing integrated boiling water systems with separate under-sink appliances.

The main difference is how the equipment is combined.

An integrated system such as OPTIH2O brings reverse osmosis purification and hot water functionality together. This may simplify the overall kitchen layout and reduce the number of separate units required.

A separate arrangement, by comparison, allows you to choose your drinking water filter and boiling water tank independently. This can provide more flexibility if you already have a preferred filtration system or only want to upgrade one part of your kitchen.

Consider the following differences:

Feature	Integrated OPTIH2O system	Separate filter and boiling tank
Filtration and hot water	Combined system	Separate appliances
Kitchen installation	Designed to work as one system	Depends on compatibility and layout
Filter replacement	Uses its specified cartridge	Depends on the selected filter
Product choice	Uses compatible taps and components	More freedom to select individual products
Best suited to	People seeking a combined solution	People wanting a modular setup

Neither approach is automatically better for every kitchen. Compare the total purchase price, installation costs, maintenance requirements, replacement cartridges and warranty before deciding.

What Is a Boiling Water Tank, and How Does It Work?

A boiling water tank is an under-sink unit that heats and stores water so it can be dispensed through a specially designed tap.

Unlike a conventional kettle, which must be filled and switched on for each use, a boiling water system keeps water available for dispensing when required.

Depending on the model, a system may offer boiling or near-boiling water, alongside other hot and cold water functions.

Common uses include:

• Making tea and coffee.
• Preparing instant drinks.
• Filling pans for cooking.
• Speeding up everyday kitchen tasks.
• Reducing the need to keep a kettle on the worktop.

Wash Water’s OPTIH2O takes this concept further by integrating reverse osmosis purification with the hot water unit.

For homeowners searching for a boiling water tank with a built-in water filter, this combination is one of the key features to investigate.

Does a boiling water tank replace a kettle?

For many everyday tasks, a boiling water tap can replace the need to use a kettle. Whether it replaces your kettle completely depends on your cooking habits, how much water you need at once and the capacity of the system.

A boiling water tank is particularly convenient for making several hot drinks throughout the day. However, you should compare its energy consumption, standby requirements, available water volume and installation costs with your current kettle before assuming it will save money.

Is a boiling water tap safe to use?

Modern boiling water taps commonly incorporate safety mechanisms to reduce the risk of accidental operation. Wash Water specifies a child safety lock for OPTIH2O’s boiling water operation.

Safety features vary between models, so check the manufacturer’s instructions before buying. Installation should follow the supplied requirements, and children should always be supervised around hot water appliances.

Which Wash Water Boiling Water System Should You Choose?

The best boiling water system depends on whether you need hot water alone or want filtration as part of the same installation.

If you mainly want instant hot water, compare the available boiling water tanks on capacity, temperature settings, energy consumption, tap design and replacement-part availability.

If you want both purified drinking water and hot water, an integrated system such as OPTIH2O may be a better fit.

Before making a purchase, ask yourself:

1. Do I want filtered cold water as well as hot water?
2. Do I want reverse osmosis filtration or a simpler filtration technology?
3. How many people will use the system each day?
4. How much cupboard space is available beneath the sink?
5. Is the existing plumbing suitable for the system?
6. What will replacement filters cost over several years?
7. Can my preferred kitchen tap be used with the chosen unit?
8. What are the warranty and servicing arrangements?

Answering these questions will help you compare systems on their long-term suitability rather than the initial price alone.

What Should You Consider Before Buying a Drinking Water Filter?

When shopping for a drinking water filter, it is tempting to choose the product with the most filtration stages or the broadest marketing claims. However, the best filter is the one that meets your requirements and can be maintained properly.

Check filtration performance

Look for specific information about which contaminants a filter is designed to reduce. If a particular substance is your main concern, look for appropriate test results or certification supporting the manufacturer’s claims.

Consider replacement filter costs

A filter’s purchase price is only part of its lifetime cost. Replacement cartridges, maintenance and any servicing should be included when comparing products.

Check installation requirements

Under-sink reverse osmosis systems may require connections for the water supply and wastewater, as well as electrical power for systems with electronic or heating components. Confirm the exact requirements for the model you intend to buy.

Think about water usage

A larger household may use more drinking water and hot water than a single-person household. Check the system’s capacity and output against your normal usage.

Look at the warranty and support

A drinking water system is a long-term kitchen appliance. It is worth checking how warranty claims are handled, where replacement filters can be purchased and whether technical assistance is available after installation.

Is Plumb Warehouse a Good Company to Buy Wash Water Products From?

If you are considering buying a Wash Water reverse osmosis filter, boiling water tank or drinking water tap, Plumb Warehouse is a UK online plumbing and kitchen retailer worth investigating.

The retailer says it has traded online for more than 18 years and sells a broad range of plumbing and kitchen products. Its website also refers to Wash Water products within its wider water-treatment range, alongside other established plumbing brands. Plumb Warehouse’s published customer reviews include positive feedback about pricing, delivery and customer service, although individual experiences vary. See Plumb-Warehouse’s excellent Google reviews here.

However, there is an important distinction between being an established plumbing retailer and confirming that a particular specialist product is currently available. Before placing an order, check directly with Plumb Warehouse whether it stocks the exact Wash Water OPTIH2O model, which compatible tap options are available, and whether the required filters and replacement parts can be supplied.

It is also sensible to confirm the current price, stock status, delivery estimate, warranty arrangements and who you should contact for technical support. If those details meet your requirements, Plumb Warehouse may be a convenient option for buying your drinking water or boiling water equipment.

You can visit the retailer at Plumb Warehouse and compare its available products with the information on the official Wash Water website.

Why Buy Wash Water Drinking Water Products?

Wash Water’s range is worth considering if you want to improve your kitchen’s drinking water facilities without treating filtration, taps and hot water as entirely separate projects.

The OPTIH2O is particularly relevant to customers looking for a combined reverse osmosis water filter and boiling water system. Its stated features include multi-stage filtration, remineralisation, adjustable hot water settings and a choice of compatible taps.

For people who only need filtered cold water, a dedicated drinking water filter may be a more straightforward and economical solution. For households seeking instant hot water and purified cold water from the same installation, an integrated system may offer greater convenience.

The best choice comes down to your priorities, budget, kitchen layout and willingness to maintain the equipment.

Frequently Asked Questions About Wash Water Filters and Boiling Water Tanks

What is Wash Water OPTIH2O?

Wash Water OPTIH2O is an integrated reverse osmosis water purifier and boiling water system. It is designed to provide purified cold water and adjustable hot or near-boiling water through compatible kitchen taps.

Does Wash Water OPTIH2O use reverse osmosis?

Yes. Wash Water describes OPTIH2O as an integrated reverse osmosis system, combining water purification with hot water functionality.

How often does the OPTIH2O filter need replacing?

Wash Water specifies a long-life five-in-one MOR cartridge with a stated replacement interval of 12 months. Follow the manufacturer’s instructions and check whether your water quality or usage affects the replacement schedule.

Does OPTIH2O provide boiling water and filtered cold water?

Yes. According to Wash Water, the system offers purified cold water alongside hot and near-boiling water settings from 37°C to 98°C.

Does reverse osmosis remove all contaminants?

No single filtration system should be assumed to remove every possible contaminant. Reverse osmosis can reduce many dissolved substances, but actual performance depends on the system, operating conditions and the contaminant in question. Check the manufacturer’s technical information for specific claims.

Is a boiling water tank cheaper to run than a kettle?

Running costs depend on electricity prices, usage, insulation, standby energy consumption and how much water you heat. Compare the manufacturer’s energy information with your current kettle use before deciding which option is more economical.

Can I install a boiling water tank under my kitchen sink?

Many boiling water tanks are designed for under-sink installation. You should check the product dimensions, ventilation requirements, water connections and electrical requirements to ensure that your kitchen is suitable.

Is Plumb Warehouse a good place to buy Wash Water products?

Plumb Warehouse is an established UK plumbing and kitchen retailer with a published history of customer reviews. It is worth considering, but confirm that it currently supplies the exact Wash Water product you want, along with compatible taps, replacement cartridges and the relevant warranty support.

Should I buy a reverse osmosis filter or a boiling water tap?

If your priority is drinking water filtration, a dedicated filter may be enough. If you also want hot water available on demand, a boiling water tap and tank may be more suitable. An integrated product such as Wash Water OPTIH2O combines both functions.

Final Thoughts: Finding the Right Drinking Water Filter and Boiling Water Tank

Choosing the right drinking water system can make everyday kitchen tasks more convenient. From dedicated filtered water taps to reverse osmosis purifiers and integrated boiling water tanks, there are several options to consider.

Wash Water OPTIH2O is worth investigating if you want reverse osmosis filtration and hot water in one integrated system. Its combination of purified cold water, adjustable hot water settings and a multi-stage cartridge makes it relevant to homeowners planning a more comprehensive kitchen water upgrade.

Before buying, compare the filtration performance, tap compatibility, installation requirements, ongoing cartridge costs and warranty. If you are considering Plumb Warehouse, confirm availability of the exact model and the support offered for that product.

Taking time to compare these details will help you choose a drinking water filter or boiling water system that suits your household, budget and kitchen for years to come.

You can browse and buy the OptoH2O range online here.