Supplied with aerator - this is for use with high water pressure.
Supplied with flow straighter - this if for use with low water pressure.Compliance / ApprovalsBS 5412:1996Specification for low-resistance single taps and combination tap assemblies (nominal size 1 and 3) suitable for operation at PN 10 max and a minimum flow pressure of 0.01 MPa (0.1 bar)
BS EN 200:2008
Sanitary tapware. Single taps and combination taps for water supply systems of type 1 and type 2. General technical specification.