Changing Your Aztec Media Bed

June 11, 2018

From time to time your Aztec Rust Buster filtration system will need to have the 5 in 1 Multi Media Bed changed to keep your water clean and free from iron. 

In this blog, is a guide on changing your Aztec Rust Buster 5 in 1 Multi Media Bed. By following the step-by-step instructions carefully, this job will go quickly and easily for you. If you have any questions during the process you can always give us a call 800-667-0707.

Step 1: Depressurize the Filter Tank (10):

  1. Loosen the slotted retainer screws (5) on both sides of the control valve dust cover (6). Then remove the dust cover (6) from the front to expose the control panel.
  2. Slowly turn the black "star-shaped" manual regeneration knob (14) clockwise on the control valve timer assembly, just enough until you hear the drive motor start to run. The control valve assembly (4) will then begin to go into the 1st backwash cycle.
  3. When the control valve drive motor stops at the 1st backwash cycle, unplug the electrical cord and let the filter run water to drain for approximately 10 minutes to loosen up the existing filter media.
  4. Shut off the water entering the filter by pushing UP the black BYPASS valve plunger (1) into the BYPASS position. The filter tank will now depressurize.

Step 2: Drain the Filter Tank and Empty the Old Filter Media

  1. Remove the two 1/2" hex bolts (2) that hold the brass control valve body (7) to the brass tank adaptor (8) on the filter tank. Keep a sponge or rag handy for small spills.
  2. Carefully, slide the filter tank out from underneath the control valve assembly (4).
  3. Insert a 1/2" piece of flexible hose down the center distributor tube (11) to the bottom of the filter tank and siphon out as much water as possible into a suitable container or drain.
  4. Now thread the two 1/2" hex bolts (2) back onto the brass tank adapter (8) and place a pry bar or long handled screwdriver between the bolts (2) and turn counter-clockwise until the adaptor (8) can be removed from the filter tank.
  5. Next, slide the plastic tank jacket (9) off the filter tank and transport the tank outside to empty out the old filter media.
  6. Lay the filter tank down horizontally on a suitable platform such as a pair of saw horses or a 1/2 ton truck box, etc. Insert a garden hose as far into the tank as possible and flush out all of the old filter media.

*Note: it is much easier to flush out the old media by raising up the bottom end of the filter tank.

Step 3: Refill the Filter Tank (10) with the New Filter Media

  1. Inspect the lower (12) and upper (13) distributor cones for any plugged slots and clean is necessary.
  2. Next, use some masking tap to seal the center distributor tube (11) at the top and insert back into the filter tank. This is so no media particle can fall inside the tube (11) while refilling with the new filter media.
  3. Place a large funnel (an empty Javex jug with the top and bottom cut off works fine) into the top threaded hole on the filter tank and pour the new filter media into the funnel around the center distributor tube (11) and down into the tank in the following order: a) Coarse Silica - quartz underbed  b) Fine Silica - quartz underbed c) fine black "polishing" media d) High-grade "filtering" media (large bag) e) Fine white "scrubbing" media

*Note: It is recommended that the filter tank be refilled outside your home to avoid any problems with dust. Also, at all times be certain to keep the distributor tube (11) centered with the lower distributor cone (12) touching the bottom center of the filter tank.

Step 4: Reassemble the Filter Tank with the Control Valve Assembly (4):

  1. Take the filter tank back into the house and slide the plastic tank jacket (9) over it.
  2. Next remove the masking tape from the center distributor tube (11) and lubricate the outside with the little tube of special silicone grease supplied.
  3. Also, lubricate the new o-rings that are supplied, and use these to replace the old o-rings on the brass tank adaptor (8). **Note: The largest o-ring fits over the threads on the the brass tank adaptor (8) and will seat between the brass tank adaptor lip and the top threaded tank collar on the filter tank.
  4. Snugly, screw the brass tank adaptor (8) clockwise back onto the filter tank. Be very careful to avoid cross threading. Also at the same time be certain the tank adaptor o-ring is not being pinched or buckled so as to cause a leak.
  5. Slide the filter tank underneath the control valve assembly (4) and line up the 1/2" threaded brass tank adaptor bolt holes with the bolt holes on the brass control valve body (7). Insert and thread the 1/2" hex bolts (2) through the bolt holes on the brass control valve body (7) to the brass tank adaptor (8) on the filter tank and tighten snugly.
  6. Slowly, push the black bypass valve plunger (1) down (approximately half way) into the SERVICE position until you can hear water entering the filter. Water and some air will now slowly start to run at the drain line.
  7. Leave the control valve assembly (4) in the 1st backwash position for approximately 10 minutes to flush out any air or fine media dust down the drain.
  8. Once the water running at the drain line is clear, plug in the electrical cord and let the control valve assembly (4) complete its backwash cycles and return to the service position.
  9. Finally, push the black bypass valve plunger (1) all the way down into the SERVICE position. Check for any leaks and reset the control valve timer assembly to the correct time of day.

Congratulations - You Are Done!!

Need Help? Call Our Service Department 1-800-667-0707


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