The Basics of Water Filter Housings

A water purification system’s cartridge filter needs a water filter housing for it to function correctly. It is designed to house and protect water filter cartridges and is usually made from durable polycarbonate plastic. Water filter housings come in a wide variety of sizes and shapes, as well as port sizes. But, its versatility doesn’t stop there. There are also various mounting options available, and it’s possible to change cartridge types whenever it is needed. This makes them ideal for any water filtration system.

Different Sizes of Filter Housings

Water filter housings come in several standard sizes, which are:

  • 2.5” x 10” (ideal for small point-of-use systems)
  • 2.5” x 20” (ideal for small homes or larger point-of-use systems)
  • 4.5” x 10” (ideal for small businesses)
  • 4.5” x 20” (ideal for commercial or whole house systems)


Most water filters are available in the above sizes. However, there are specialty and proprietary filters that are unique and do not follow any standard size.

What’s the Deal with Dual and Triple Water Filter Housings?

When shopping for a filtration system for your home, you may have come across the terms dual and triple filter housings. If you require several different filters to remove various kinds of water contaminants, then you will need a dual or triple housing. Just as its name implies, this type of housing comes in two or three sumps that are all connected on a single filter cap. There are several benefits you can get from using a water filter housing with multiple sumps. For example, it is very convenient because keeping all the water filters together helps ensure that the water flows through the water filters in the right order.

Commercial Versus Residential Housing

Commercial and residential filter housings basically have the same function, but there are still some distinct differences. One key difference is that commercial-grade housings can withstand high water pressure requirements. One such housing you can consider is stainless steel filter housing, as it allows water filtration at higher pressures. Some of them are also able to hold multiple sediment filters.