Water Treatment Solutions & More From Water Softeners & Filters


See the diagram above to connect push in style John Guest fittings. Detailed instructions below.

To Attach Tubing

  1. Push tubing straight in as far as it will go. (image 1)
  2. Tubing must be inserted past o-ring and hit backstop. (image 2)
  3. Pull tube to ensure it is secured.

To Release Tubing

  1. Push in grey collet to release tubing. (image 1)
  2. With collet held, put tubing straight out. (image 2)


If you are looking to replace a fitting visit our John Guest product page.


I have an Autotrol 255 valve control that has been unplugged. Now I can't figure out how to reset it. Please tell me how to program this again. Thank you


As long as you didn’t change the settings yourself, they are all still programmed into the timer. The valve control, even when unplugged, will hold the settings until someone physically changes them.

Every home has unique water issues that will affect the valve control timer's programming. The frequency is depending on a variety of issues, including:

  • Water hardness
  • Iron content
  • Size of the softener
  • Number of people in the home

If you need to change your programming you can find instructions in the Autotrol 740/760 255 Valve Control Manual.

If you need help determining an effective timing schedule, based on your individual needs, please contact us.


How do I remove the threaded tip of the Aqua-Pure filter cartridge AP217 which broke off inside the Aqua-Pure filter housing in our residential kitchen? It broke off when I was unscrewing the housing and I cannot get it out.


Although frustrating, removing the broken tip should be easy if you follow these steps:

  • Heat the tip of a screwdriver on your stove.
  • Insert the heated screwdriver in the center of the filter cartridge tip that is stuck.
  • Allow the screwdriver (and cartridge tip) time to cool a bit.
  • Turn the broken portion of the cartridge tip, it should unscrew without issue.

If you are still having problems removing the filter cartridge tip feel free to contact us.   


I just replaced the filter on my APRO5500 system and it continues to have a significant decrease in output. It starts out with a normal flow but quickly decreases to a trickle. If I turn it off for a few minutes it will have significant flow again but significantly decreases as before. Do I need to contact a plumber or Reverse Osmosis service company?


Before calling a plumber or service company, try these steps:

  1. Check your tank, it is probably heavy; the water needs to be drained from your tank.
  2. Open your faucet and pump air into the air nozzle in the bottom of the tank. Note:Water will come out.
  3. Continue this process until water no longer comes out.
  4. Set the tank air pressure to 8 psi and let the tank fill for 2 hours.
  5. Open the valve and empty the tank to flush it out.

If you are still experiencing issues please contact us.


I have the AP904 system. When is it time to change the filter? Or is there an indicator? About how many gallons can you put through the filter before changing?


The AP904 comes with the AP917HD-S replacement filter, which has a manufacturer suggested capacity of 100,000 gallons. However, if you do not have a dirt/sediment pre-filter in front of your AP904 system, the filter may prematurely clog with dirt and other sediment.

The best way to determine when to change your filter is when you notice a drop in water pressure or the rate of flow slows. For additional recommendations on determining when to replace filters check out our full post on How Do I Know When to Replace My Filter?

If you're interested in extending the life of your AP904 system, here are some popular options for a pre-filter system:


AP801 C Kit