"I bought this item to use as described. It is a perfect fit and looks good in the shower. But in active mode the pressure and amount of water that comes out the shower head got reduced to hardly 1/3 and was not enough to wash the tiles and screen easily. The filter catridge needs to be replaced every 2 months as per the instruction and costs £20 or so. Its not worth the money you invest (£80) and is not economically viable. I have returned the product for a refund and going for a water softener instead."