[Steven Biggs]

That’s great . Cleared that up for me . Thanks Darren , and old guy ,

[Steven Biggs]

Anyone recommend a booster pump for a Merlin . Will it make a difference 280 going in 16 coming out . But I assume that will go up in a bout 3 months . Just like Granville’s z

[AuRavelling79]

Anyone recommend a booster pump for a Merlin . Will it make a difference 280 going in 16 coming out . But I assume that will go up in a bout 3 months . Just like Granville’s z

What's the pressure?

[Spruce]

Spruce - if you boosted that you would get down to 003

Darran

Hi Darran, I'm already getting 3ppm without a booster. I can't see much of an improvement with boosted water pressure - 2ppm maybe. Hardly worth the extra effort and cost imho.

[AuRavelling79]

Spruce - if you boosted that you would get down to 003

Darran

Hi Darran, I'm already getting 3ppm without a booster. I can't see much of an improvement with boosted water pressure - 2ppm maybe. Hardly worth the extra effort and cost imho.

Just for clarity. You're talking 4040, yes?

[Spruce]

Spruce - if you boosted that you would get down to 003

Darran

Hi Darran, I'm already getting 3ppm without a booster. I can't see much of an improvement with boosted water pressure - 2ppm maybe. Hardly worth the extra effort and cost imho.

Just for clarity. You're talking 4040, yes?

Yes. The reason I started talking about my 4040 is that with the r/o running at its sweet spot the membrane has lasted well.  Steven Biggs was concerned that restricting the waste a little more would reduce the longevity of his PRF membranes. While I have no experience with a PRF r/o  I have to believe that making this mod won't have a detrimental result with regard to his membrane's longevity.

I also pointed out that having a higher waste to pure ratio means that his r/o is consuming more water. This means his carbon block's service life will be shorter even although he is producing the same amount of water.  I believe the carbon block is good for 38k of water. It doesn't take long to go through 38k of tap water.

I also agree with you that have a set of prefilters before the PRF makes good sense.

[Steven Biggs]

Anyone recommend a booster pump for a Merlin . Will it make a difference 280 going in 16 coming out . But I assume that will go up in a bout 3 months . Just like Granville’s z

What's the pressure?

pressure is only 30

[Smudger]

sorry - mis read the post

Darran

[Steven Biggs]

Where is the best , cheaoest place to get the carbon filters . I assume they are all the same , or do some suppliers sell inferior ones . Don’t want bro end up with rubbish . I would rather buy a few at a time .

[AuRavelling79]

Where is the best , cheaoest place to get the carbon filters . I assume they are all the same , or do some suppliers sell inferior ones . Don’t want bro end up with rubbish . I would rather buy a few at a time .

The carbon filters are unique to the Merlin/PRO I think.

I have looked around the net in the past and got ten at £15 plus vat each. But last time I found that £20 plus vat was the starting point with maybe a 5% discount for a £100 order.

[Steven Biggs]

Cheers old timer . Looks like that price is the going rate .