Non-metallic materials in contact with drinking water in the UK must conform to British Standard (BS) to address regulations regarding. Find the most up-to-date version of BS at Engineering These Guidance Notes gives details of the BS tests and test sample The requirements for the suitability of non-metallic products are given in BS
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The mean dissolved oxygen difference MDOD between water exposed to the product and control is determined based on measurements taken in weeks 5, 6 and 7. Accept and continue Learn more about the cookies we use 6920–1 how to change your settings. WRAS approvals for fittings require both mechanical testing, as well as testing of non-metallic tests to BS Suitability of non-metallic materials and products for use in contact with water intended for human consumption with regard to their effect on the quality of 690-1 water.
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British Standard BS – WCP Online
After exposure, any increase in the color or turbidity of the water must be less than five Bbs units and 0.
If after seven weeks the MDOD value is between 1. The odor and flavor, color and turbidityextraction of substances of concern to public health and extraction of metals tests are carried out at the specified high temperature. Your basket is empty. Customers who bought this product also bought BS Worldwide Standards We can source any standard 69220-1 anywhere in the world. The MDOD must be less than 1.
British Standard BS 6920
So non-metallic materials are evaluated for extraction of metals, along with the four other tests listed above, but metallic materials are not evaluated for extraction of metals in the UK. Click to learn more. This is a study of gross acute toxicity.
So, there will be multiples of each of these tests for products that include multiple non-metallic materials in contact with the water supply, with each being a separate test on separate materials. The samples must also be no more than 12 months old at the date they are received at the test laboratory.
If bx arithmetic mean of the MDOD values from the three product samples is less than 2. This directory can be found at https: When shipped to the laboratory, the samples are typically placed into labeled, bd bags, because samples labeled directly with adhesive tape, ink, etc.
Suitability of non-metallic products for use in contact with water intended for human consumption with regard to their effect on the quality of the water the 620-1 title of BS may be long, but it does effectively describe the scope and purpose of the standard. You may experience issues viewing this site in Internet Explorer 9, 10 or If the application is determined to be acceptable, then the WRAS issues the approval.
Extraction of substances of concern to public health This test is also known as the cytotoxicity test.
Metallic materials are not evaluated under this test. This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3.
Approvals are valid for five years. The list of metals and maximum admissible concentration MAC of each is included in Figure 1. A sample may consist of more than one piece. Materials are exposed to water and then the water is placed in contact with mammalian bx to observe any toxic effects on the cells, in order to assess potential human toxicity. After exposure to the gs and a 1: WRAS does not own or operate a testing laboratory.