Mixed PVC jointing sleeve for gluing and threading manufactured by Hidroten (UP. 05. SFT). The mixed PVC-U couplings allow to join pipe sections, gluing on one side and threading on the other (female thread). Available in sizes from 20-1/2" to 110-4".
https://www.piscinayspa.com/se/pool-accessories/156/pvc-accessories/10908/mixed-union-sleeve/FS10908Manguito unión mixtohttps://www.piscinayspa.com/fotos/productos/manguito-union-mixto.jpg1.101.10InStockSwimming Pool Accessories/PVC Accessories/Hidroten5