Whole House Water Filters in Northern VA

Three Treatments ALL IN ONE!

Combination Water Softener and Whole House Filtration System.
Ideal for City and Community Water!


  • Chlorine taste and odors
  • Harmful Chemicals (VOCs and More!)
  • Water Hardness

Get Safe, Filter, Soft water from every water faucet in your home!

How it works!
First, water flows downward, through the catalytic activated carbon and KDF to remove Chlorine taste and odors, along with potentially harmful chemicals. Water Hardness is removed by the premium grade softener resin, so you enjoy the many benefits of soft water.

whole house filter

How Up flow (In/Out) Whole House Water Filters Work

Simple point of entry (whole house) water filters that do not backwash to clean and resettle their filter media are often called "in/out" filters. The water simply goes in one side, passes through the filter media, then goes out the other side. There's nothing fancy about this type filter. It's a big tank called a mineral tank that is filled with granular filter media. It has a simple center tube called a "riser" to direct the flow of water inside the tank.

The filter pictured above is the most common style, the downflow. Water enters the tank head from the left, is released into the top of the tank, and works its way through the media to the bottom of the tank. At the very bottom of the tank the water passes through the fine slots in the riser basket, then is forced upward through the riser to the tank head and exits the filter at right.

how it works

The Up-flow Version:

In the upflow version of the same filter, water enters the tank head and is sent down the riser tube to be released at the bottom of the tank. It slowly works its way upward through the media and is collected at the top and exits the filter.

In/Out filters are inexpensive as compared with backwashing filters. Their simplicity also makes them attractive alternatives to backwashing filters in many situations. Their use is limited, however, mainly to use as dechlorinating filters for city water and for neutralizing filters for acidic well water. Plus, the water they treat must be clean, so it's wise to always install a sediment filter in front of an in/out filter.

In/Out filters do not work as iron filters, because a backwash function is needed to get rid of the trapped iron. Likewise, they do not work as sediment filters and must, as noted, be protected from sediment when they are used as city water dechlorinating filters or as neutralizing filters for wells.

In/Put filters actually have an advantage over backwashing filters for city water dichlorination in that more media can be loaded in the tank since freeboard space does not have to be left at the top of the tank to accommodate backwashing. For example, a 10" X 54" backwashing filter can be loaded with 1.5 cubic feet of carbon, but a 2.0 cubic foot bed works well in an in/Out filter.

how it works upflow

If you Have any questions or concerns, please give us a call at 571-334-8283.

If you Have any Installation or Sales questions, please call Roy at 571-334-7770.

pristine logo




  • Large capacity housing suitable for high flow applications
  • Available in 10” and 20” lengths
  • Pressure Relief/Bleed on inlet side of cap
  • Accepts up to 4-1/2” diameter cartridges
  • Big Blue Heavy-Duty Filter Housings offer the versatility to meet all of your large capacity filtration needs, including high-flow and heavy-sediment applications. The extra-large housing allows for greater cartridge capacity, reducing the number of vessels required for high flow-rate applications. Sumps are available in both 10” and 20” lengths.
  • The High-Flow Polypropylene (HFPP) cap is available with ¾”, 1” or 1-1/2” NPT inlet and outlet ports. The 1-1/2” internal port allows a greater volume of liquid to pass through the HFPP cap more rapidly.
  • Big Blue Housings are compatible with a broad range of chemicals and are available with or without a pressure relief button. They accept a wide variety of 4-1/2” diameter cartridges.

filter housings 1


  • Housing –Polypropylene
  • Cap –Polypropylene
  • Button Assembly –300 –Series stainless steel, EPDM, and polypropylene
  • O-Ring –Buna-N
  • Temperature Rating –40-100F
  • Maximum Pressure –10” : 100 psi (6.9 bar)
  • 20” : 90 PSI (6.2 bar)
filter housings 2

Instructions on Big Blue 10” and 20” Filter Replacement:

  1. Locate the Two valves (One before the Big Blue unit, One after the Unit).
  2. Turn Both Valves Off
  3. Place a Bucket under the unit to catch any water.
  4. Hit the Red Button on Top of the unit. (failure to do this step will result in the pressure not releasing)
  5. Find the Spanner Wrench located near your system. (Remember Righty Tighty Lefty loosey) Use this to loosen the canister.
  6. Make sure you are careful with the O-ring and it stays on the rim of the canister.
  7. Take old Filter out and Replace with new filter.
  8. Hand tighten the bottom of unit to the top and then use the Wrench and turn ¼ turn.
  9. Turn Valves Back on
  10. Check for any leaks
  11. If leak persist or you have any questions or concerns, please call Pristine Water 571-334-8283 and we can further assist you or have our technician come out to you to further assist. For Technical Questions Please Call Roy at 571-334-7770

Whole House Carbon Filter Northern VA

Pristine Water offers whole house water filter installation, water filtration system repair & maintenance services to all the following areas:

Northern Virginia to Richmond: Fairfax County, Arlington County, Alexandria VA, Prince William County, Loudoun County, Stafford County, Fredericksburg, Spotsylvania County, Fauquier County, Culpeper County, King George County & Richmond VA area, Washington DC and Maryland including Montgomery County, Prince Georges County, Charles County, Calvert County, Prince Frederick and other areas in Southern MD.

If you don't see your area listed, please call or email us to see if we can serve you.