Here are the products you are looking for. Here's the Big Blue housing.
20 Inch Big Blue Whole House Water Filter Housing #20 from Ametek, USFilter, and Pentek This housing is commonly used for whole house applications, and best of all they use a standard size filter(translated filter availability for the next millenium). You will need 2 of these; one for the sediment and one for the carbon. Here is an excellent choice for a sediment filter
DGD-7525-20 Water Filter and Pentek DGD752520 sediment filters for 20 inch Big Blue Whole House Housings and here is a good quality carbon block filter
EP-20BB filters and Pentek EP20-BB carbon water filter cartridge 155583 for 20 inch big blue housings and here is a link to our faucets page
Faucets for Reverse Osmosis Systems and Drinking Water Spigots for Under Sink Water Filters where you will find faucets designed to go with RO systems. We also have water softeners, but they are not on the web site yet.
Thank you,
WaterFilters.NET