Torbeck Bottom Entry Valve is a great high quality product. It is neat and compact so will fit most toilet cisterns. The anti-siphon design of this product will prevent contamination of a fresh water supply. The refill is quiet and fast, and has a removable filter. The height of this is adjustable between 8.1/2" -12" and includes a ½" inlet. There is a small footprint, this enables the product to be installed into small cisterns.