I have to quote for a commercial property. Water regs, requires it to have "approved spray or self closing taps OR at a flow rate not exceding 4 l/min, utilising approved flow restrictors in acordance with the requirements of secs; 73-75 Water industry act 1991 and Water Supply Regs 1999" i presume i can use standard push button taps? as they are self closing?? Thanks. Dont want to install the wrong taps and have to go back and do it again!!