DIY: RO Filter maintenance

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Another Tool/Gadget to finger my D.I.Y. Itch,

Will be Using it to monitor RO Water and would skip the service contracts, cause spares are easily available now a days
and for those who know how it works, can easily save a couple of thousand a year.
Basic operation is, You can check TDS level twice a month, The least the reading is, purer the water is.
my current reading is 21 after 1 year of usage. I am not spending 4.5k on contract this time.
New Filters and membrane installed would give readings, near 0(Zero) while normal home usage of 1 yr. should not be more
than 15-25. and if you change the sediment filter in 6 months, your membrane would last twice its normal life of 1 yr as suggested by companies, but all that counts is the TDS Count, So watch and act.
new filter set would be around Rs.900 ( 3 filters)
One Decent Filter membrane would be Rs.1200-1400
and companies charge 4K + for annual AMC so what they would cover extra is PUMP, and that's only Rs.1000 tops, so all in all even in worst case scenario (Blown Pump) you can save Rs.1000 and if pump doesn't needs to be replaced you save Rs.2000+ a year.
other parts are considered as consumables and would be charged by AMC providers so its out of equation for D.I.Y. cost.

Last pic from phone cam before it went down for 2 days :-)
Bought Pocket Digital TDS Meter from this seller delivered a day earlier than ebay estimated time.
Paid Rs.550/- after ebay discount coupon.
 
The membrane was changed 2 yrs back, the unit is still under AMC till Jan, but I refuse to get it serviced by the company because they do not do a good job. I'm awaiting delivery of my self service kits, will service it myself this weekend.

Edit: the values are correct. Since the AMC guys never pro actively come and service the unit, we have been dependent on judgment by taste of water only, hence the high TDs figures.
 
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I am amazed

Speed post service is mind blowing, yesterday I asked for refund because item was not delivered in stipulated time however I had 5 more days incase I received the item to close refund request, but item came to my place post office and already opened, packed and transfered to dehradoon again, the seller city.

Is there any way seller could have asked speed post service to do that in the middle of transit?

Is speed post service in india is so advanced?
 
Not to mention that item few days ago came to my place and then gone for holidays in Moradabad for no freaking reason then came back to my city again and now gone back to seller city............ Speed post acting like Assholes
 
I might end up canceling my Amazon order tomorrow and order it again using next day shipping. Probably would reach me before Indian Post.
 
Indian Post is pathetic, but Bluedart is just rubbish, I got 3 packages through bluedart which are in transit since 8 days, one of them is lying at their local hub near me since last 4 days.
 
TDS count on my 15 months OLD Aquaguard Reviva Machine and its membrane is 20, yes its TWO ZERO.

my friend recently bought "Kent" and I got chance to get chilled water in his shop which came from NEW R.O.
and its reading was 02 . water did tasted little sour but thats way to perfect.

Remember, the colder the water, lesser would be its TDS count.

Personally, I would take TDS coun tof 85-100 as the Extreme Top Limit before I would change the filter/membrane.
Start with filters, and if replacing it doesn't gives desired output, go for a Membrane.
 
TDS count on my 15 months OLD Aquaguard Reviva Machine and its membrane is 20, yes its TWO ZERO.

Personally, I would take TDS coun tof 85-100 as the Extreme Top Limit before I would change the filter/membrane.
Start with filters, and if replacing it doesn't gives desired output, go for a Membrane.

What is the TDS for your raw water?

The RO TDS depends on the quality of your raw water,
Membrane TDS efficiency % = (Raw TDS - Filter TDS) / Raw TDS * 100

System should always be 80-97% efficient, if not the membrane is faulty and needs replacement. Mine is running at 70.8%
 
Tap water from water supply is 400+
 
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