Stuck Rain-to-Mains Valve? Here's How to Fix It Yourself (And Save Yourself a Headache)
If you rely on a rain-to-mains changeover valve, you know how critical it is that it switches cleanly between tank water and mains.
But sometimes... it doesn’t.
Suddenly, you're stuck on mains when the tank is full — or worse, stuck on the tank when it’s bone dry. You’re paying for water you didn’t need, or worse, have no water at all.
Why Does This Happen?
Over time, the internal piston inside your changeover valve can seize. Why? It dries out. Loses its lubrication. The grease breaks down or washes away. Without that grease, the valve doesn’t move — and your system stays stuck.
But here’s the good news:
You don’t need a plumber.
You don’t need to replace the whole unit.
You can fix this yourself in under 10 minutes.
Below is a short, straight-to-the-point video that shows you exactly how to:
✅ Open the valve safely
✅ Remove the internal piston
✅ Re-grease it using food-safe tap grease
✅ And get your system switching perfectly again
Why This Matters
💧 Avoid surprise water bills – Don’t get stung by running on mains when you didn’t need to.
🛠️ Prevent permanent valve failure – Left jammed long enough, some valves never recover.
⏱️ Fix it fast – No waiting for trades, no expensive service calls.
💸 Save hundreds – Some people get quoted $300+ to replace a stuck valve. This costs you a few bucks in tap grease and 10 minutes of your time.
Watch the Video: How to Re-Grease Your Rain-to-Mains Valve
Video showing how to repair and re-grease an RM1500-2 and RM1600-2 Rain to Mains Changeover Valve.
What You’ll Need
Food-safe tap grease (widely available at Bunnings, Reece, or any plumbing supply store)
A wrench or multi-grips
10 minutes of your time
This video ⬆️
Don’t Let a $5 Problem Cost You $500
This is one of those annoying little issues that snowballs if ignored. And once you know how easy it is to fix, you'll wish someone told you sooner.
👉 Watch the video now, follow the steps, and get your valve working like new.
