2025 Model OP15 Water System Guide
This guide covers the potable, grey, and black water systems, plus how to drain or winterize.
Manage Your OP15 Water System
Stay hydrated and clean on your off-road trips with the OP15 2025’s water system! This guide covers the potable, grey, and black water systems, plus how to drain or winterize—perfect for your camping needs.
System Overview
- Potable Water Capacity: 63 gallons spread across two tanks, ideal for drinking and cooking.
- Grey Water Capacity: 17 gallons for wastewater from the sink and shower.
- Black Water Capacity: 10 gallons for toilet waste.
- Water System: Features 1 x 12V electric pump for water supply.
- Hot Water: The Truma Combi Heater and Hot Water System (runs off propane and 12V) provides hot water to the kitchen sink, bathroom sink, and shower.
Supplying Water
- Filling: Use a potable water hose to fill the tanks at the designated fill points marked with a blue icon.
- Connections: Connect the front tank to the kitchen sink and the rear tank to the bathroom shower and toilet via quick-connect fittings.
- Hot Water: Activate the Truma Combi system, set the thermostat, and wait 10-15 minutes for hot water to flow.
Pack-Down and Drainage
- Draining: Turn off the pump switch, open all faucets, and use the low-point drain valves under the tanks to empty them.
- Grey and Black Tanks: Release wastewater into an approved disposal site using the dump valves.
- Winterizing: Add RV antifreeze (2-3 gallons per tank) through the pump, run it through all lines until pink fluid appears, then drain. Flush with fresh water and sanitize before reuse.
- Pro Tip: Check tank levels regularly and clean the pump strainer monthly to maintain flow.
Enjoy clean water on your adventures! Contact 925.215.7315 or info@opuscamper.us for support.