When to change filters and resin?

[Greener]

Yes, I added 2 more so ended up with 3. /emoticons/wink.png
Deionization Units : Deionization (DI) Polishing Unit 1400ml

That worked as our tap water tds is so low. I used to replace the resin every 3 months when I replaced the prefilters.

My 450gpd r/o was screwed onto the garage wall so I fitted the extra 2 resin housings underneath it. In winter I used to put a towel over the system and put a 100 watt light bulb in my mechanics lead light underneath it to keep it from freezing up. It worked like that for 7 winters without issue. I reasoned that having a di vessel would necessitate me finding another way to keep the system from freezing up.

In hindsight, I should have bought a 6 liter di vessel rather than waste money on 2 more housings with resin canisters. The good thing about have a low rejection rate of 2 is that we can clean windows with that and get away with it. So ensuring the resin was changed at exactly the right time wasn't the highest priority. I did used to check the output and would always change resin the moment the water in the van's tank went to 1ppm. It was easier to test the water in the vans tank than the ibc tank.

The only time when I started to get into trouble was when the membranes were at the end of their life. The rejection rate was increasing and I ended up replacing resin each time I filled the IBC tank.

Rather than replacing the membranes I bought all the components to put a bespoke 4040 together in a purpose made, thermostatically controlled heated cabinet. That took a little more time than I first thought.

Thanks for your answer @spruce /emoticons/smile.png I was looking at upgrading to a 6/7 ltr di vessel but couldn't find any connecting fittings for the di vessel that would fit the ¼" tubbing that's used with the 450gpd ro system.

 

[spruce]

This should work @Greener;

John Guest 1/2" Female BSP to 1/4" Push-Fit Adapter - 1/4" Fittings - John Guest Fittings - Hose Fittings & Adapters - Pump & Hose - All Products Gardiner Pole Systems

and;

Straight Bsp Male to Male Nipples, Equal Male Full Range Bsp Nickel Plated Brass

additional 1/4" tubing from Gardiners.

PTFE tape

 

[Greener]

This should work @Greener;
John Guest 1/2" Female BSP to 1/4" Push-Fit Adapter - 1/4" Fittings - John Guest Fittings - Hose Fittings & Adapters - Pump & Hose - All Products Gardiner Pole Systems

and;

Straight Bsp Male to Male Nipples, Equal Male Full Range Bsp Nickel Plated Brass

additional 1/4" tubing from Gardiners.

PTFE tape

Thanks @spruce you rock :: ;-) :clap: /emoticons/smile.png)

 

[Greener]

Thanks @spruce you rock :: ;-) :clap: /emoticons/smile.png)

If I was to order these parts @spruce, please can you explain what I need the Straight Bsp Male to Male Nipple for? I was thinking of ordering this 7 Litre DI Resin Pressure Vessel Canister - New Price - De-Ionisation - Water Treatment - Pure Water Systems - All Products Gardiner Pole Systems

Sorry I haven't used a DI vessel before :tmi:

 

[spruce]

If I was to order these parts @spruce, please can you explain what I need the Straight Bsp Male to Male Nipple for? I was thinking of ordering this 7 Litre DI Resin Pressure Vessel Canister - New Price - De-Ionisation - Water Treatment - Pure Water Systems - All Products Gardiner Pole SystemsSorry I haven't used a DI vessel before :tmi:

I see that one from gardiners has 1" ports so those 1/2" barrel nipples won't work.

I would ask Alex if he will make up a kit similar to the 3/8 he advertises but for 1/4" pipe. Here is the link to the 3/8 fittings.

Fitting Kit for DI Pressure Vessel & John Guest 3/8" Tube - De-Ionisation - Water Treatment - Pure Water Systems - All Products Gardiner Pole Systems

 

[doug atkinson]

I have a 3/8" male barrel with 1/4" push fit. If I have time will post a pic up. Need to spend some time adding a warehouse full on items not on the website.

 

[Dave85]

Thought I would post in this thread rather than start a new 1 but I was previously getting a reading of 4 and just been checking it now and have tds reading of 20!!! My ro and resin etc are only a couple of months old and I'm only window cleaning part time at the moment so filters shouldn't be worn out. Any ideas as I'm a bit worried. Thanks .