Water Pressure Regulator For RVs

A water pressure regulator in an RV controls and stabilizes water flow from external water sources into the RV. This prevents damage to plumbing and fixtures caused by high water pressure. This article discusses the need for a water pressure regulator for an RV, its types, installation basics, and troubleshooting guidelines.

Table of contents

• Need for a water pressure regulator for RV
• Types
• Installing a water pressure regulator on an RV
• Troubleshooting pressure regulators in an RV
• Selecting the right water pressure regulator
• FAQs

Need for a water pressure regulator for RV

Water pressure from municipal sources can vary depending on the location of the campground or RV park. While one site may provide a low-pressure supply safe for an RV, another could offer high-pressure water that poses a risk to the RV's plumbing system. Having low water pressure may be inconvenient, but it's unlikely to cause any harm to the RV. However, excessively high water pressure can cause damage to the RV's plumbing lines or fittings, leading to leaks and potential water damage.

A water pressure regulator is installed at the RV's water intake to control the water pressure coming from the external source. It acts as a barrier, reducing the water pressure to a safe level before it enters the RV, protecting the pipes, fittings, and appliances from the stress of high pressure.

Note: A water pressure regulator is not necessary for filling the fresh water tank in an RV, as the tank can handle the pressure from a standard hose without issues.

Correct water pressure

The appropriate water pressure for an RV can differ based on the design and the current state of the vehicle's plumbing. Modern RVs can generally withstand water pressures of up to 6.9 bar (100 psi), but crossing 4 bar (60 psi) is typically not advisable. Water pressure in the 2.7 to 3.8 bar (40 to 55 psi) is often suitable for most RVs. However, It's essential to refer to the RV's owner's manual for the precise pressure limit recommended for the particular vehicle. The manual might also suggest a specific kind of water pressure regulator that one should use.

Types

There are three main types of water pressure regulators suitable for RVs:

• Single-stage: Single-stage adjustable regulators are the most common type. They have one pressure reduction stage, are typically adjustable, and are generally sufficient for most RVs.
• Preset: Preset regulators come pre-set to a specific output pressure, usually 40-45 psi, which is simple to use but offers less flexibility.
• Dual-stage: Dual-stage regulators have two stages of pressure reduction and offer finer control and greater stability, but are heavier, bulkier, and more expensive and are not typically used in most RVs due to their higher cost and complexity.

Installing a water pressure regulator on an RV

The most effective approach is to fasten the regulator directly to the city water supply spigot. Then, attach a water filter to the regulator. Certain water pressure regulators have an integrated pressure gauge and filter. After the filter is in place (if an external filter is used), connect the city water hose (explicitly designed for potable water and different from an ordinary garden hose) to the filter. Finally, attach the other end of the city water hose to the RV's city water inlet. This setup ensures the water pressure is regulated before it passes through the filter and into the RV, providing protection and clean water for the RV's plumbing system.

Additional tips

• Use plumber's tape on the threads for a better seal, and follow the manufacturer's instructions specific to the water pressure regulator model.
• If the regulator strains the hose or connections, use a hose protector or an L-shaped elbow to relieve stress and prevent damage.
• Inspect the regulator and connections before each use and look for signs of damage or wear over time. Always carry a spare regulator as a precaution.
• Drain the regulator and hoses before freezing temperatures to prevent damage.

Troubleshooting pressure regulators in an RV

Common problems faced by RV owners regarding water pressure regulators include:

1. Low water pressure:
   1. Cause: The regulator may be set too low or clogged with debris, reducing the water flow.
   2. Troubleshooting: First, check that the regulator is fully open and correctly adjusted. If the pressure is still low, disconnect it and check for debris or sediment. Clean the regulator by rinsing it with clean water. If the issue persists, the regulator might be faulty and need replacement.

2. High water pressure:
   1. Cause: The regulator might fail and not reduce the pressure as it should.
   2. Troubleshooting: Use a water pressure gauge to check the pressure from the regulator. If it's too high, adjust the regulator to lower the pressure. If it doesn't adjust, replace it.

3. Water leaks:
   1. Cause: Leaks can occur at the connection points if the regulator isn't properly attached or the washers /o-rings are worn out.
   2. Troubleshooting: Ensure the regulator is properly connected to the hose and the RV's water inlet. Check and replace any damaged washers or o-rings. Use plumber's tape (Teflon tape) on the threads to create a better seal.

4. No water flow:
   1. Cause: This can be due to a completely clogged regulator or a closed valve.
   2. Troubleshooting: Make sure all valves are open. Remove the regulator and check for clogs. If there is a blockage, clean it out. If there are no blockages and the valve is open, the regulator might be broken, necessitating a replacement.

5. Intermittent water pressure:
   1. Cause: This could be due to debris entering the regulator intermittently or an issue with the internal components of the regulator.
   2. Troubleshooting: Clean the regulator by removing it and flushing it with water. If the problem continues, the regulator may have internal damage and need replacing.

Selecting the right water pressure regulator

Consider the following factors when choosing a water pressure regulator for an RV:

1. Pressure range: Ensure the regulator can handle RV parks and campgrounds' typical water pressure range. A regulator that can be adjusted to different pressures is ideal.
2. Material: Regulators are generally made of brass or plastic. Brass is more durable and offers better longevity, but plastic regulators are cheaper. Ensure the brass is lead-free to comply with safety standards for drinking water.
3. Connection type: The regulator should have standard hose fittings to connect to the RV and water source easily. Check for compatibility with the RV's hose threading.
4. Flow rate: The regulator should maintain an adequate flow rate to ensure one has enough water for daily tasks. Choose one that provides at least 11 - 15 liters per minute (3-4 gallons per minute).
5. Integrated gauge and filter: Some regulators have a built-in gauge. This feature allows one to monitor the water pressure and adjust if necessary. Consider a regulator with a built-in filter to trap sediment and protect the RV's plumbing.

Read more about different types of pressure regulators in our other articles on water pressure regulators and home water pressure regulators.

FAQs

Is a water pressure regulator necessary for an RV?

Yes, a water pressure regulator is necessary to prevent high pressure from damaging the RV's plumbing system.

How to adjust a water pressure regulator for an RV?

Turn the adjustment knob to set the regulator to the desired pressure, and verify the value using a gauge.