To EN 1451-1. Polypropylene. Do not solvent weld. The actual outside diameters of the pipes are approximately 41 mm (40 mm nominal). The wall thicknesses are about 2 mm.
https://www.bes.co.uk/polypipe-push-fit-40-mm-grey-straight-coupling-push-fit-11099/35303Push-fit Straight Coupling - 40mm Greyhttps://www.bes.co.uk/media/catalog/product/p/o/polypipe-push-fit-40-mm-grey-straight-coupling-push-fit_min_11099_P_1.jpg1.261.26GBPInStock/Plumbing Supplies/Plumbing/Waste Water/Pipe & Fittings/Push-fit/Our Brands/FloPlast308141151273074307530778To EN 1451-1. Polypropylene. Do not solvent weld. The actual outside diameters of the pipes are approximately 41 mm (40 mm nominal). The wall thicknesses are about 2 mm.Unbranded00https://www.bes.co.uk/media/catalog/product/p/o/polypipe-push-fit-40-mm-grey-straight-coupling-push-fit_min_11099_L_1.jpg5055149903434add-to-cartfacet_type:Straight Couplingfacet_sub_brand:AAAspecial_price:1.260000more_sizes:11097,11100products_related:11064,11075,11080,11065,11117,11131,11126,11122,11104,11085,19872,22311sku:11099AAAStraight Coupling11097,1110011064,11075,11080,11065,11117,11131,11126,11122,11104,11085,19872,22311110991.260000No{"Standards":"BS EN 5254 (EN 1451-1)","Colour":"Grey","Connection":"Push-fit","Diameter":"41 mm","Fitting Type":"Straight Coupling","Material":"Polypropylene","Size":"40 mm","Suitable Application":"Push-fit Waste System","Type":"Straight Coupling"}UnbrandedGreyPolypropylene40 mm