Why Did My RV Water Pressure Drop After Installing a Filter?

A decrease in shower or faucet output after installing an RV water filter does not always mean the campground has low pressure. The restriction may be occurring somewhere between the spigot and the fixture.

Every filter creates some resistance because water must move through its filtration media. A larger change may indicate a loaded cartridge. It may also point to the hose or regulator or fittings or an installation issue.

The first step is determining whether the RV has a pressure problem or a flow problem.

Pressure and Flow Are Different

Pressure is measured in PSI. It describes the force pushing water through the system. Flow is measured in gallons per minute or GPM. It describes how much water moves through the system.

An RV can have adequate incoming pressure and still experience weak fixture output. A clogged filter or narrow fitting may restrict flow even when the pressure reading appears normal. Blu Technology recommends operating its filtration systems and water softeners at 60 PSI or below. Do not increase pressure beyond the limits specified by the RV or component manufacturer to overcome a restriction.

Check the Filter Cartridge

A new filter may maintain strong flow at first and become more restrictive as it collects sediment. Campground water conditions vary. One source may contain very little sediment. Another may contain enough sand or rust to load a filter quickly. A cartridge that normally lasts an entire season may require earlier replacement after exposure to a high-sediment source.

Signs of a loaded filter include:

• Gradual reduction in faucet or shower output

• Strong flow before the filter and weaker flow after it

• Visible discoloration or sediment on the cartridge

• Improved flow after the cartridge is replaced

• Reduced output across every fixture

Replacement intervals are estimates. Actual filter life depends on the water source and sediment load and total usage.

Inspect the Hose and Regulator

The hose can create more restriction than the filter.

In Blu Technology lab testing the filtration systems produced approximately 2.4 to 2.6 GPM at 60 PSI when used with hoses that have a ⅜-inch inner diameter. The systems can deliver up to 5.5 GPM when used with ¾-inch inner diameter hoses at 60 PSI under the stated test conditions.

The pressure regulator can also restrict flow if it is undersized or clogged. Inspect its inlet screen and confirm that its flow capacity is appropriate for the RV. Never remove the regulator or exceed the manufacturer’s pressure limit simply to increase output.

Test the Campground Source

If the same system performs differently between campgrounds the source may be responsible.

Campground flow and pressure can change based on:

• Local water-system design

• Distance from the campground supply

• Elevation

• Demand from other guests

• Time of day

• Well-pump operation

• Maintenance activity

The filtration system can only perform within the pressure and flow available from the source.

Use a basic bucket test to estimate GPM:

GPM = container volume in gallons × 60 ÷ fill time in seconds

If a one-gallon container fills in 20 seconds, the flow is approximately 3 GPM. Measure the flow directly at the spigot. Then test after the regulator and hose and filtration system. A significant decrease between two points helps identify the restriction. Change only one component at a time so you can identify the actual cause.

Find the Actual Restriction

If water output decreases after installing a filter do not assume the filtration system is automatically the problem.

Check the campground source. Inspect the regulator. Confirm the hose diameter. Straighten kinks. Verify the direction of flow. Inspect your filter cartridges. Measure flow before and after each component.

Water conditions change between campgrounds. Maintenance should respond to those conditions rather than relying only on a calendar. The goal is not the highest possible GPM. It is practical whole-RV flow delivered at an appropriate pressure through components engineered to work together.

Maintaining Flow With the Blu Technology AR3

The Blu Technology™ AR3 is designed to provide certified three-stage filtration while maintaining practical whole-RV flow.

Its architecture includes:

1. Sediment pre-filtration

2. OFFGRID™ Advanced Filtration rated down to 0.2 micron*

3. Activated carbon to help improve taste and odor

Actual output depends on source pressure and hose diameter and regulator capacity and cartridge condition and RV plumbing. Under Blu Technology lab conditions the AR3 produces approximately 2.4 to 2.6 GPM with ⅜-inch inner-diameter hoses at 60 PSI. It can deliver up to 5.5 GPM with ¾-inch garden inner diameter hoses at 60 PSI.

Blu Technology accessories can help RVers manage the complete water path. A pressure regulator helps control incoming pressure. A flow meter provides visibility into water use. These accessories do not increase the filtration system’s rated flow. They help users understand and manage it.