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Prior to installing your new filter system, it is important that the RV fresh water system be sterilized to remove all existing contaminants. The procedure we suggest can be found on this web site under “Cleaning The RV Water System”.

The filter system you received from us is fully assembled, cleaned and ready to install. The following items are included with the kit:

  • Dual filter housing assembly with mounting bracket installed.
  • Prefilter cartridge.
  • Final filter cartridge.
  • Ground stand assembly.
  • 10 foot, 5/8 inch service hose, drinking water safe.
  • 3 sets of plastic inlet/outlet plugs (two sets are spares)

Maintenance Tools:

  • Filter housing wrench.
  • Siphon assembly.
  • Eye dropper and vial.
  • Measuring spoon set.

The filter cartridges are shipped in protective plastic sleeves. Leave them in the sleeves until ready for installation. It is very important while installing the filter cartridges not to contaminate them. Wash your hands and use care during this step. The fittings and housings have been cleaned prior to shipment.

Installing The Cartridges

Make sure that the filter marked “prefilter” goes in the housing marked “prefilter” and the final filter goes in the housing marked “final filter”. The small rubber spacers that look like washers have to be installed on top of the filter cartridges. This is necessary to prevent bypassing within the housings.


When placing the filters in the housings, be careful that the spacer and filter cartridges are lined up and do not “tilt” when assembling the sump to the housing. After placing the cartridges in the housings, snug the sumps down using the supplied wrench (see above).

Setting Up The System For Use

The system comes with a mounting bracket. This bracket allows for hard mounting in the RV service compartment, if desired. Mounting methods can vary dependent on available room and configuration within the compartment.

The installer should determine the most appropriate installation placement. Normally, self-tapping #10x3/4 screws are sufficient. In some installations nuts and bolts may be more appropriate.  Check to make sure there is nothing on the backside of the mounting surface that could be damaged.  Keep in mind that the filter housings should be easily accessible for cartridge change and service.

The system is also supplied with a stand for external use.  The ground stand is fully assembled and easy to set up. The upper frame legs slide into the tee’s located on the lower frame. The filter housing assembly can then be attached to the upper frame cross arm as shown in the picture. As can be seen in the picture, the filter assembly is suspended from the back-side of the frame, which allows the housings to hang properly. The frame upper and lower frames can be separated for storage as shown.

When you are ready to place the filter system in service, attach a drinking water safe (DWS) hose from the water supply bib to the inlet of the filter system. DWS hose is normally white in color and marked as safe for drinking water. All water feed hose should be a minimum of 5/8 inches in diameter. Purge the hose for 1 minute before attachment to the filter inlet. Do not use a hose that is significantly longer than required. 25 feet will normally be sufficient. The longer the hose, the more restriction to water flow. Hose may be ordered from us, if needed. After the hose is attached to the filter, turn on the supply water and open the inlet valve on the filter assembly. Do not open the filter outlet valve. Purge the air from the housings by unscrewing the small vent screws a few turns, located on top of the filter housings.  This step is important, so make sure all the air is expelled and water flows from the vents.

Tighten the vent screws and open the filter outlet valve. Allow water to flow through the filters for 2 or 3 minutes to purge the system.

Turn the water off at the filter assembly outlet. Attach the supplied 10-foot hose from the filter outlet to the RV inlet. Open the filter outlet valve. Bypass the fresh water tank and feed water directly into the RV (Water should never be contained in the fresh water tank unless it is chlorinated. See the section titled, “Treating Fresh Water For Storage”). Turn on the water and check for leaks. Now enjoy good, clean water in your RV.

Removing The System From Service

When it is time to remove the system from service, turn off the water at the hose bib. Next, close the valves on the filter assembly inlet and outlet. Remove the hoses and drain as much water as possible from them. Roll up the hoses and connect the hose ends.

Install the plugs on the filter assembly inlet and outlet. These plugs are not water tight but help block debris. The water trapped in the filter assembly should not be drained. Store the filter assembly in a safe place for transport. The system can be stored vertically or horizontally but it is a good idea to provide some type of shock isolation to prevent damage while being transported. Placing the filter assembly on top of the coiled hoses will work well.

If the filter system is not going to be used for more than a few days, please review the sections regarding pickling the system during storage.

When to replace the filters.

Life expectancy of the filters is primarily dependent on the quality of the supply water that in many cases can be very unpredictable. The quality of the supply water, the amount of water you may use on average and the number of days you use your RV in a given period of time, all contribute to how long the filter will last. The system may ultimately foul to the point that water flow through the system will diminish to a less than usable level. This is your indicator that it is time to replace the filter cartridges. 

The manufacturer of the prefilter suggests that many thousands of gallons can be processed if the supply water is of average quality. Of course filter life span will be shortened as the level of contaminants increases. The final filter is far more critical due to its very small pore size. The good news is that the prefilter is so effective and has such a large dirt holding capacity it enables the final filter to perform much better and for a longer period, processing a larger quantity of water. The final filter has the capacity to remove chlorine and chlorination by-products for several thousands of gallons. The metal reduction capability of the final filter begins to fall off as soon as the filter is put in service. The effective life limit for metal reduction is approximately 2,500 gallons, under normal use. This quantity should provide for 6 months of normal RV use, unless used for extended periods.

The most effective means to determine when to change filters is based on flow rate. When the flow diminishes to an unacceptable level, it is time to change the filters. With heavy demand and poor input water quality, the filters may require change-out in a short period of time. If you use your RV only occasionally and the source water is of reasonable quality, much longer time intervals between filter changes can be expected. In any event, we recommend changing the filters at 6 month intervals, along with a complete RV water system sterilization procedure as outlined under “Cleaning The RV Water System”.

We suggest that you carry a spare set of filter cartridges with you. Our replacement filter kits include the cartridges, new o-rings and rubber gloves for handling contaminated filters.  



Clean your RV water system regularly.

Be careful when handling the filter system. Never drop it as the filter cartridges may become damaged.

Store the filter system properly. Pickle the filters and RV water system to inhibit contaminant growth.

Use common sense when hooking up to a water source. If the supply water is suspected of being heavily contaminated, find another source.

Use a pressure regulator if the source water supply pressure is excessively high. (Over 50 PSI.)

When in use, place the system in the shade, if possible. Heat and sunlight encourages contaminant growth inside the system.

If water has not been drawn from inside the RV for several hours, run the faucet for 15-20 seconds to flush any bacteria that may have back-fed into the plumbing.

Call us if you experience any problem using the RVF-1 system.


Never subject the system to freezing temperatures. Freezing will destroy the filters and damage the housings and hoses.

Never store the RV or filter system unless they have been pickled.

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History | Technical Details | Lab Reports

· Installing & Maintaining the RVF-1 System | Bottling & Storing Drinking Water

RV Water System Cleaning | Treating Fresh Water for Storage | Pickling the Water System

· Terms & Conditions· Q & A·

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