In a 1991 Newnan Mountainaire travel trailer, the water filter is typically located near the main water supply line to ensure all incoming water is filtered before distribution. Common locations include:

• Near the Freshwater Tank: Often situated under a bed, dinette, or within a storage compartment, the filter may be attached to the water line close to the tank.
• Adjacent to the Water Pump: Protecting the pump from debris, the filter could be found near the pump, which is usually located close to the freshwater tank or in a utility compartment.
• Under the Kitchen Sink: Some models feature a separate filter for drinking and cooking water, installed under the kitchen sink.
• Exterior Compartment on the Driver’s Side: In certain models, the filter is accessible via an exterior compartment near the freshwater inlet.

To locate the filter:

1. Inspect Common Areas: Check near the freshwater tank, water pump, under sinks, and exterior compartments.
2. Consult the Owner’s Manual: It provides specific information about the water system layout.
3. Seek Professional Assistance: If the filter remains elusive, consider consulting a professional familiar with RV systems.

Regular maintenance of the water filter is crucial for ensuring clean water and the longevity of your trailer’s plumbing system.