Brass compression fittings. BS 864-2:1983 or BS EN 1254:1988. They conform to both these standards apart from marking: a fitting conforms to the standards with which it is marked.
https://www.bes.co.uk/compression-elbow-15mm-17686/46282Compression Equal Elbow - 15mmhttps://www.bes.co.uk/media/catalog/product/1/5/15-mm-x-15-mm-equal-compression-elbow-imported_min_17686_P_1.jpg0.861.15GBPInStock/Pipe Tube & Fittings/Pipe Fittings/Compression/Competitive Prices/Lower Prices/Pipe Tube & Fittings41671209424212414241454241<p>15 mm x 15 mm equal compression elbow.</p><p>Brass compression fittings. BS 864-2:1983 or BS EN 1254:1988. They conform to both these standards apart from marking: a fitting conforms to the standards with which it is marked.<br></p>BESt range00https://www.bes.co.uk/media/catalog/product/1/5/15-mm-x-15-mm-equal-compression-elbow_min_17686_L_1.jpg5056198111023add-to-cartfacet_type:Elbowspecial_price:1.150000campaign_additional_text3:marchpromo23campaign_category:Pipe Fittingscampaign_was:1.21cat_multi_facet_l1:Fittingsis_on_sales:Nomore_sizes:24682,17683,17684,17685,17687,17688,17689,17690,17691products_related:20394,8748,18256,6921,9084,7621,16444,6962,21385,21031,7550sku:17686marchpromo23Pipe Fittings1.21FittingsElbowNo24682,17683,17684,17685,17687,17688,17689,17690,1769120394,8748,18256,6921,9084,7621,16444,6962,21385,21031,7550176861.150000No{"Connection":"Compression","Demountable\/Reusable":"No","Equal\/Reducing":"Equal","Finish":"Brass","Fitting Type":"Elbow","Material":"Brass","Size":"15 mm","Type":"Elbow"}Equal90°BESt rangeBrassMetric15 mm