What is Huwa-San?
Huwa-San, manufactured by Roam Technology, is the most stable, silver hydrogen peroxide on the market. It is a specifically blended multipurpose, disinfectant and biocide.
It is great for surface, air and water disinfection and has been proven to kill bacteria, viruses, moulds, fungi and algae.
It has been thoroughly tested by independent laboratories and there is a huge amount of efficacy data. This is available on request.
In addition it more than proved itself in the field where customers, for example, have seen a reduction in positive legionella results when using this product.
It is currently being supported through the Biocidal Product Regulation (BPR) by Roam Technology for Product Type (PT) PT2, PT3, PT4 and PT5. PT5 includes the disinfection of animal and drinking water. Full registration is expected in the summer of 2021.
What is the difference between Huwa-San TR-3, TR-5 (Spa-Pool), TR-20 and TR-50?
The number at the end of Huwa-San is the concentration of the peroxide in the product. For example Huwa-San TR-3 is 3% peroxide, TR-20 is 20% peroxide etc.
Our customers generally choose the concentration of product that is best suited to the job that they are carrying out.
For example, Huwa-San TR-3 is well suited for surface disinfection. This is a ready made solution that will kill bacteria, viruses, fungus and mould. It has been proven in independent testing to kill enveloped viruses including coronaviruses and SARS.
It can also be used where small amounts of water require to be disinfected such as mains systems and domestic water systems around 200 litres.
Huwa-San TR-5 (Spa Pool) can be used to disinfect spa pools. It provides a great bathing experience for the user. The water feels silky smooth and is not drying. In addition Huwa-San TR-5 is simple to use as unlike chlorine products it does not require pH correction. It is a simple single, solution product.
Huwa-San TR-20 is a 20% silver stabilised hydrogen peroxide that can be used for water disinfection. This would generally be used for water systems between 200 litres and 10,000 litres. Some customers prefer it as it is safer to handle than the Huwa-San TR-50.
Huwa-San TR-50 is the strongest and most concentrated of the Huwa-San products. It is used for water disinfection of tank and mains fed systems and also for constant dosing.
As the concentration of peroxide in the Huwa-San increases the personal protective equipment that the user needs also increases.
Why would I use Huwa-San, silver hydrogen peroxide instead of chlorine (bleach) to disinfect my water system?
- Huwa-San is easier to work with than chlorine. It is a single chemical and does not require neutralisation up to dose rates of 1000ppm peroxide. Unlike chlorine which must be neutralised prior to discharging.
- It removes the biofilm on the pipework surface where the majority of bacteria will live and multiply. Unlike chlorine which will only remove newly formed biofilm or the top layer.
- Huwa-San’s break down products are oxygen and water which are environmentally friendly. Chlorine can form over 600 by-products several of which are cancerous.
- It is safer for your staff to work with.
- It is easier for your staff to work with. Operatives find it easier to calculate dose rates and time spent on site is reduced as neutralisation is not required.
- It is not pH dependent. Unlike chlorine which should be dosed at pH 7.2-7.6 to ensure efficiency.
- It has no odour, taint or smell.
How do I disinfect my cold water storage cistern?
Please see our help sheets for information on how to disinfect your cold water storage system.
Huwa-San TR-3 Low Level Disinfection of Domestic Water Systems
Huwa-San TR-20 Low Level Disinfection of Commercial Water Systems
Huwa-San TR-50 Low Level Disinfection of Commercial Water Systems
Does Huwa-San kill legionella bacteria?
Yes at disinfection rates of 100ppm peroxide (200ppm Huwa-San) over 24 hours or 1000ppm peroxide (2000ppm Huwa-San) over 1 hours Huwa-San will kill legionella. Independent tests, by TNO Food and Nutrition Laboratories 2013, show that 2000 ppm Huwa-San (1000ppm peroxide) will achieve a 4.8 log reduction of legionella in 1 hour.
In addition Huwa-San will remove a pseudomonas based biofilm which is harder to remove than legionella bacteria.
Please see our help sheets below that explain how to disinfect water systems at
- 1000ppm peroxide/2000ppm Huwa-San (on-line) Huwa-San TR-50 High Level Disinfection of Commercial Water Systems
- 100ppm peroxide/200ppm Huwa-San (on-line) Huwa-San TR-50 Low Level Disinfection of Commercial Water Systems
When carrying out a Huwa-San disinfection can the water be used?
A low level Huwa-San disinfection would be carried out at 100ppm peroxide over a 24 hour period. Although cold water storage tanks should feed drinking water outlets there are occasions when they may. In this case if someone took a drink of water at 200ppm Huwa-San/100ppm peroxide it would be safe for drinking and bathing.
The National Sanitisation Foundation, who provide certification that products will help protect food, water, consumer products and the environment have advised that as a one off dose Huwa-San is suitable to drink up to 728ppm peroxide.
However where disinfection rates increase to 1000ppm the system must be taken off line and would not be safe for drinking or washing.
During disinfection when I have achieved 100ppm peroxide at all my outlets. Do I need to flush the peroxide dosed water out of the system?
When carrying out a low level Huwa-San disinfection 100ppm is the level of peroxide that is required for carrying out the disinfection over 24 hour period. This dose rate has been calculated to allow for normal usage of the system and assumes that the cold water storage cistern being disinfected has a 24 hour retention time. Where possible is better to disinfect the cistern and the down services when there is minimum use to give Huwa-San the optimum time to work. The longer the contact time, the more the chemical will work and do its job.
There is no requirement to flush the outlets to 0ppm peroxide. Indeed it would be mean that there was insufficient chemical in a system for the disinfection to be effective.
Huwa-San dosed at 100ppm peroxide would be safe for drinking and bathing.
Please see our help sheet below to carryout a low level disinfection at 100ppm peroxide/200ppm Huwa-San
Huwa-San TR-50 Low Level Disinfection of Commercial Water Systems
I want to carry out a mains water disinfection how would I do this?
Mains water disinfections are usually carried out at 1000ppm peroxide over an hour. Generally 3% Huwa-San is good for mains water disinfections as less product is required due to the small volume of water held in the mains pipework. In addition 3% Huwa-San would be suitable to come into contact with copper and stainless steel pipework.
Please see out help sheet below for carrying out a mains disinfection.
Huwa-San TR-3 Mains Water Disinfection
Mains disinfection can also be carried out using using Huwa-San TR-20 and TR-50. Please contact SafeSol for further information by phone: 0191 447 8008 or email: info@safesol.co.uk
What concentration of Huwa-San is recommended for spa pool disinfection?
Hydrogen peroxide can only be sold to the general public at concentrations of less that 12%. Therefore for domestic and household spas we would recommend Spa Pool, which is a 5% silver stabilised hydrogen peroxide.
This is great for spa users who have asthma that is brought on by harsh chemicals like chlorine. In addition it is kind to wood based spas causing less damage to them than chlorine.
It is a single chemical treatment that doesn’t require pH adjustment which means that it is simple and easy to use.
The one thing to bear in mind when using Huwa-San for spa pool treatment is that filter maintenance is key. It must be ensured that filters are regularly changed and disinfected between cleans to ensure optimum efficiency.
What is constant dosing?
Generally, a legionella control monitoring programme is based on temperature however the HSE advise that biocidal control can be used as alternative to temperature. Huwa-San TR-50, silver stabilised hydrogen peroxide is a biocide that can be used to keep water systems free from pathogens.
“Silver stabilised hydrogen peroxide has a history of use in the control of Legionella in water systems. A silver hydrogen peroxide is injected directly into the water system and if applied and maintained according to the manufacturer’s instructions, can be an effective means of control. However, this should not be used in water systems supplying dialysis units.”
HSG 274(2014) TECHNICAL GUIDANCE FOR LEGIONNAIRES’ DISEASE, PART 2 (PAGE39)
Huwa-San is dosed proportionally to the mains water system using a degas head pump. A water meter sends a signal to the dosing pump to let it know that chemical should be dosed to the system. The water meter, the pump and the injection point are held in a system bypass to allow for maintenance on the water system. Dosing Huwa-San allows the temperature of the water to be reduced decreasing the energy use in a system. Like temperature monitoring there must also be suitable monitoring of a water system controlled using a biocide.
Please be aware that in a hospital setting biocidal control can only be used as an extra form of legionella control in addition to temperature.
Checkmate: Stain and Odour Eliminator
What chemical would you recommend to get rid of odours?
Our Checkmate, enzyme based chemical, breaks down odours to their component parts of carbon dioxide and water. It removes smells such as cigarette smoke, rotting rubbish, urine and vomit. It can also be used on a wide range of surfaces such as sort furniture, hard surfaces and artificial grass.
It has been used successfully in pubs and clubs to remove vomit from carpets.
It has been used successfully to remove the smell of urine from urinals
It has been used successfully to prevent water recycling plant from smelling.
Checkmate breaks down and eliminates smells. It doesn’t mask them.
Please be aware it should not be used with any bleach based products as this will prevent the product working.
Test Strips
How do you use your test strips?
All our test strips are for testing levels of hydrogen peroxide in water systems. They are compatible with any hydrogen peroxide or silver stabilised hydrogen peroxide. They are simple and easy to use. Simply dip the strip into the solution to be tested, wait an appropriate amount of time and then compare to the colour scale on the side of the test strip tub.
The help sheets below to provide further information
Extra High Level Hydrogen Peroxide Test Strips 0-5000ppm peroxide. pdf
High Level Hydrogen Peroxide Test Strips 0-1000ppm peroxide. pdf
Medium Level Hydrogen Peroxide Test Strips 0-400ppm peroxide. pdf
Low Level Hydrogen Peroxide Test Strips 0-100ppm peroxide. pdf
