What are the common causes of damage to Nibco 90 anti-siphon valves?
How to Repair Nibco 90 Anti Siphon
Nibco 90 anti-siphon valves are commonly installed in many homes for outdoor irrigation systems. This type of valve is responsible for preventing pollutants from flowing back into the potable water supply when the water pressure drops. However, like any other valve, Nibco 90 anti-siphon can malfunction over time. In this article, we will walk you through the step-by-step process of how to repair Nibco 90 anti-siphon valves.
Materials and Tools Required
- Nibco 90 anti-siphon kit
- Adjustable wrench
- Pliers
- Phillips screwdriver
- Teflon tape
- Silicone grease
Step-by-Step Guide for Nibco 90 Anti-Siphon Valve Repair
Step 1: Turn off the water supply to the irrigation system
Before you begin to repair the Nibco 90 anti-siphon valve, you need to turn off the water supply to the irrigation system. This will help prevent any water from coming out of the system while you are repairing the valve.
Step 2: Remove the valve bonnet
Using an adjustable wrench, loosen the nut that attaches the valve bonnet to the valve body. Then, remove the bonnet by pulling it straight up. If the bonnet is stuck, use pliers to grip it firmly and twist it back and forth while pulling it up.
Step 3: Replace the valve diaphragm
The valve diaphragm is the part that controls the flow of water through the valve. To replace the diaphragm, first, remove the screws that hold it in place. Then, remove the old diaphragm. Replace it with a new one and reattach it using the screws you removed earlier.
Step 4: Replace the o-ring
The o-ring seals the area between the valve bonnet and the valve body. To replace it, remove the old o-ring and replace it with a new one. Make sure to apply a light coating of silicone grease to the new o-ring to make it easier to install.
Step 5: Check for leaks and reassemble the valve
Once you have replaced the diaphragm and o-ring, check for leaks by turning the water supply back on. If there are no leaks, reassemble the valve by reattaching the bonnet to the valve body. Tighten the nut with an adjustable wrench. Use Teflon tape to ensure a tight seal.
Conclusion
Repairing a Nibco 90 anti-siphon valve is a simple process that can save you money and time. With the right tools and materials, you can repair the valve yourself without the need for a professional plumber. By following this step-by-step guide, you can efficiently repair your Nibco 90 anti-siphon valve and ensure it works as it should.