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-1-21004/32899Drain Pressure Test Nipple - 1"https://www.bes.co.uk/media/catalog/product/t/e/test-nipple-cap-plastic_min_21004_p_1.jpg1.651.65GBPInStock/Tools & Equipment/Tools/Plumbing & Heating/Drain Equipment/Tools & Equipment/Tools/Plumbing & Heating/Expanding Plug/Testing Equipment/Drain/Pressure Testing81583710181215931096536339Methods 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.Unbranded00https://www.bes.co.uk/media/catalog/product/d/r/drain-pressure-test-nipple-1-21004_L_1.jpghttps://www.bes.co.uk/media/catalog/product/1/i/1in-test-nipple-cap-plastic-2_min_21004_l_2.jpgadd-to-cartfacet_type:Drain Test Nipplespecial_price:1.650000products_related:9366,8759,13049,13052,13053,15195,13054,6901,6904,8181,9403sku:21004Drain Test Nipple9366,8759,13049,13052,13053,15195,13054,6901,6904,8181,9403210041.650000No{"Material":"Plastic","Size":"1"","Type":"Drain Test Nipple"}UnbrandedPlastic1"