I've just plumbed in 2 appliances in my kitchen, replacing some very untidy existing work. All is now in apple-pie order! However, the monobloc tap tails are joined to the supply by a couple of speedfit unions (minus the collars that keep them locked...) and I'm inclined to put in place a pair of stainless-steel braided flexible hoses, but a chum told me not to use such hoses, saying they're unreliable and will sooner or later start to leak. I'm thinking that rubber-lined braided hoses have been in use in the automotive industry for decades and are very reliable, under much higher pressures than they'll see in my kitchen. Who's right - my chum or me?!