Methods of testing drains may be found in BS 8301:1985 the code of practice for building drainage and BS 8005:1987 the British Standard for sewerage. A typical test arrangement for a 100 mm/4" pipe illustrated below.
https://www.bes.co.uk/drain-pressure-test-nipple-2-22975/46605Drain Pressure Test Nipple - 2"https://www.bes.co.uk/media/catalog/product/2/i/2in-test-nipple-cap-plastic_min_22975_P_1.jpg4.034.03GBPInStock/Tools & Equipment/Tools/Plumbing & Heating/Drain Equipment/Tools & Equipment/Tools/Plumbing & Heating/Expanding Plug/Testing Equipment/Drain/Pressure Testing81583710181215931096536339<span style="font-size: 12.132px; letter-spacing: 0.36396px;">Methods of testing drains may be found in BS 8301:1985 the code of practice for building drainage and BS 8005:1987 the British Standard for sewerage. A typical test arrangement for a 100 mm/4" pipe illustrated below.</span>Unbranded00https://www.bes.co.uk/media/catalog/product/d/r/drain-pressure-test-nipple-2-22975_L_1.jpghttps://www.bes.co.uk/media/catalog/product/2/i/2in-test-nipple-cap-plastic-2_min_22975_L_2.jpgadd-to-cartfacet_type:Drain Test Nipplespecial_price:4.030000products_related:9366,8759,13049,13052,13053,15195,13054,6901,6904,8181,9403sku:22975Drain Test Nipple9366,8759,13049,13052,13053,15195,13054,6901,6904,8181,9403229754.030000No{"Diameter":"2"","Material":"Plastic","Type":"Drain Test Nipple"}UnbrandedPlastic