Video: Aprilaire 4004 Strainer Screen

Aprilaire 4004 Strainer Screen for Humidifier Product Information and Installation
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Hi, I’m Jay, and this is the Aprilaire 4004 strainer screen.
What it does is filters out sand and other particulate matter which might get into the solenoid valve and plug it. It’s installed on the inlet side of the solenoid valve and should be replaced every two to three years.

Replacement is easy. Here’s how.
Before performing this service, it is necessary to shut off the water.
Find the saddle valve, turn it clockwise until it stops.
We’ve already turned off the water, so now we’re going to change the strainer screen.
 
This is the incoming water line, the solenoid valve, and the feed tube. There’s an arrow here indicating which direction the water flows through the solenoid valve.

Here’s the tools we’ll need:
- 7/16 inch wrench
- half-inch wrench
- pair of needle-nose pliers
- and a common paper clip.

Now we’re going to disconnect the water line.
We’ll loosen this up. Pull the water line out of the way. Now we’re going to take the paper clip and straighten it out. Alright, that’s straight enough. Now we’re going to bend a small hook on one end of it. There we are.

The small hook is going to be used to catch the strainer screen. We’re going to slide it in like this to grab the old one. So we’re going to reach into the valve, grab the old strainer screen, pull it out and dispose of it.

Now we’re going to take the new strainer screen, insert it into the solenoid valve, take the straight end of the paper clip and use it to push the strainer screen into place. Now all we have to do is reconnect the water line, tighten it up, and there we have it. It’s all done. Now the only thing we need to do is turn the water back on.

Thank you for watching. For this and other products, visit us at aprilaireparts.com




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