[jk999]

Where's cheapest place to buy three off these filters

[kempy]

Think gardiners or ryair is it ?

[jk999]

Looked at gardiners n three will come in at around 85 pounds , I think the last two sets of three I bought was about 80 pounds for both sets from vyair I think

[SeanK]

£86.40 to be exact which is total madness, I spend £24 plus vat a year on 4 sets of ten inch of pre-filters and have
never had a problem with my 4040 ro membrane, £4.50 for the carbon and £1.50 for the sediment plus vat.
Seriously you could buy a set of cheap 10 inch pre filters forget about them and change your membrane every year and a half
and end up no worse off financially and I'm talking about a 4040 any other and your talking every six months.
If your membrane is more than 2 years old your actually spending more to protect it than the membrane is worth.

[jk999]

Probably  not a bad idea