BS 6920-1 PDF

The Green document status indicator indicates that the document is: a current in the Construction Information Service and b the latest version - ie it does not have any other documents that replace or amend it and is promoted as a current document by the publisher. The Amber document status indicator indicates that some caution is needed when using this document - it is either: a current in the Construction Information Service but has a document or documents that replace or amend it, so please look at the "Newer Versions" tab or b not in the Construction Information Service but with another reason why it may be relevant to our customers such as being cited in NBS or in the Building Regulations Approved Documents. Again there may be more recent versions of the document. The Red document status indicator indicates that the document is an old version The document has likely been withdrawn by the publisher, also the meta data presented here may be out of date as it is no longer being maintained by the editorial teams at NBS.

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WRAS approvals for fittings require both mechanical testing, as well as testing of non-metallic tests to BS We use cookies to make our website easier to use and to better understand your needs. Growth of aquatic microorganisms Materials are placed into water that is saturated with dissolved oxygen and sealed into bottles. If after seven weeks the MDOD value is between 1. Extraction of metals A leaching test on all non-metallic materials is conducted.

After exposure to the water and a 1: A list of metals is analyzed regardless of material type or formulation. Over a period of seven to nine weeks, the dissolved oxygen levels are measured to determine if any aerobic microorganism growth has resulted in a decrease in the level of dissolved oxygen in the water.

Metallic materials are not evaluated under this test. If the MDOD value is 1. Ten samples of each material are required. A taste bbs panel is employed for the evaluation. WRAS approves these laboratories based on their participation in comparison tests conducted to ensure that approved laboratories achieve similar test results.

If the application is determined to be acceptable, then the WRAS issues the approval. When shipped to the laboratory, the samples are typically placed into labeled, polyethylene bags, because samples labeled directly with adhesive tape, ink, etc. The faster, easier way to work with standards. 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.

Note also that no formulation disclosure is required because the testing is applied in the same way for each non-metallic material regardless of material type or formulation.

Find Similar Items This product falls into the following categories. The test is conducted with both chlorinated and non-chorinated water. 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.

A sample may consist of more than one piece. This directory can be found at https: The list of metals and maximum admissible concentration MAC of each is included in Figure 1. This is a study of gross acute toxicity. There are no manufacturing-facility audits required for WRAS approvals. Materials are exposed to water and then the water is placed in contact with mammalian cells to observe any toxic effects on the cells, in order to assess potential human toxicity.

Take the smart route to manage medical device compliance. Note that each of these tests is conducted on one sb only, not on products consisting of multiple materials.

So non-metallic materials are evaluated for vs of metals, along with the four other tests listed above, but metallic materials are not evaluated for extraction of metals in the UK. Your basket is empty. If the arithmetic mean of the MDOD values from the three product samples is less than 2. Odor and flavor This test is performed on individual materials to determine if the materials impart a discernible odor or flavor to the water.

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WRAS approves these laboratories based on their participation in comparison tests conducted to ensure that sb laboratories achieve similar test results. Find Similar Items This product falls into the following categories. WRAS does not own or operate a testing laboratory. 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. Extraction of substances of concern to public health This test is also known as the cytotoxicity test.

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