solvent weld knuckle joint on a 110mm pipe (that was advertised in screwF as push fit)
Push fit or 'Ring Seal' has always seemed more popular, (possibly because its cheaper, and easier to install)
Screwfix do sell solvent weld 110mm fittings some are weld one end and push fit the other
(M/F fittings possibly?)
Also because it allows for expansion/building movement I believe.
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