After Installing the pump, water heater, and manifold, we continued the work on the other side of the bus. In this installment, we will focus on water filtration as well as the water inlet.

With the filter housings, we have again selected parts that are more suited for a house than for an RV. Most typical RV systems either use the type of filter that screws directly into the hose bib or opt to use 2.5" x 10" filters. Unfortunately, both of these solutions can limit the water flow pretty severely. This limitation is magnified as the filters get into the finer micron range. To improve water flow you need to go bigger. Residential whole-house systems typically use 20" x 4.5" or 10" x 4.5" filters. There are many variables to flow rate but the bigger filters typically offer between 50% and 200% increase in flow rate.

After a lot of research, we found that the CULLIGAN WH-HD200-C Whole House would fit our needs best. They feature a very robust design, large clear housings, stainless steel reinforced inlet/outlet connectors, as well as an integrated valve on top to bypass or shut off the water flow. It accepts "normal" house filters that can be picked up relatively inexpensively at any big box store in the 4.5" x 10" size. They offer a significant increase in flow rate over the more traditional 2.5" filters as well as longer filter life.

For the water inlet, we had to go the RV route. This is, after all, an RV specific part typically. One thing we wanted to avoid is a water inlet that would significantly reduce the pressure of the incoming water. Some RVs are not designed to withstand "normal" house-hold operating pressures of 40 to 60 psi so they use regulators to drop the pressure to something they can manage. While we wanted SOME protection (we don't want 120 psi water pressure coming into the bus) we didn't want to be at the lower end of that range. Fortunately, they make water inlet fixtures in different limiting PSI ratings. Another thing that is typically built into the inlet is a check (one-way) valve. This prevents water from shooting out of the fixture when the RV system is pressurized using the onboard pump.

After a little research, we selected the SHURFLO Chrome 183-029-14. It features a built-in 65 psi pressure regulator and a check valve. The chrome exterior will be a good match to the existing Furrion Stainless Steel 50A shore power inlet. For details on 50-Amp shore power install click here.

In the video, we talk about some of the considerations we had for selecting our filters. How we will be using them as well as show how we installed the water inlet.

Watch the video:

Click here If you cannot see the video.

Parts we used

• CULLIGAN WH-HD200-C Whole House Water Filter
• SHURFLO Chrome 183-029-14 Pressure Reducing City Water Entry