I have found that MDPE pipe inserts that fit 20mm MDPE water supply pipe are loose in black pipe from the 1980s. Please does anyone know where I can buy the correct size insert?
I have found that the black pipe will fit into a 20mm blue fitting, because the external diameter it is only slightly larger than the blue pipe; however, the internal diameter of the black pipe is larger than in the 20mm blue, hence the need for a slightly larger diameter insert.
I have found that the black pipe will fit into a 20mm blue fitting, because the external diameter it is only slightly larger than the blue pipe; however, the internal diameter of the black pipe is larger than in the 20mm blue, hence the need for a slightly larger diameter insert.
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