Where is the water pump (or its controller) located on my Tiffin, and how do I access it?
The location of the water pump (and its controller) in a Tiffin motorhome depends on the model and floorplan—but here’s how it generally breaks down:
🔍 Typical Water Pump Locations by Coach Type
🚌 Class A Diesel Pushers (Phaeton, Allegro Bus, Zephyr)
- Commonly located in the wet bay or just behind it inside a service compartment.
- Sometimes mounted behind a removable panel in a basement storage bay.
- Access may require unscrewing a panel or opening a utility cabinet door.
🚐 Class A Gas (Open Road Allegro, Red 33AA, etc.)
- Often mounted under the bed, behind a wall panel, or under a wardrobe cabinet.
- Some are in a pass-through bay with plumbing service connections.
🔌 The Water Pump Controller (Multiplex Controlled)
- Tiffin typically uses a Spyder or Firefly multiplex controller for pump switches.
- The controller module is usually near the pump or behind an access panel inside a bathroom vanity, cabinet, or utility compartment.
- You’ll see wiring connected to labeled terminals—look for “WATER PUMP” or “PUMP OUTPUT.”
🛠️ How to Access It
- Check your owner's manual or Tiffin wiring/plumbing diagrams (they often list component locations).
- Open the wet bay and inspect behind access panels—some are fastened with Velcro or screwed in.
- Listen for the pump: With the pump on and no water flowing, it’ll hum quietly. Use this sound to trace its exact location.
- Look for nearby inline strainer: It’s a clear plastic filter housing just before the pump inlet—if you find that, you’ve found the pump.