[Frank pole]

Mains pressure here has dropped off - So its time to buy a booster pump.
Some people are telling me to buy the ro man pump which pushes the pressure through all filters inc pre filters,  and some people are telling me that I should only boost the pressure before the membraines ie use one of them 24 volt pump/transformer kits I run a 450gpd ro and not sure what pump to buy - your comments appreciated!

[jonisondell]

24 volt ones are equatic type, will not work ro-man pump is the one you want its about 200
http://www.ro-man.com/shop/product_info.php/cPath/28/products_id/245

[Oakley Windows]

The previous one listed is rated for 4040 units................this one'll do you fine

http://www.windowcleaningwarehouse.co.uk/shop/index.php/NEW-PRODUCTS/Aquatec-100psi-Pump/Detailed-product-flyer.html

Plumb it in between the pre-filters and membranes.

[Frank pole]

a few people/suppliers I have spoken to say that you are not to put the pre filters under any pressure

[Frank pole]

Matt - are they the 24v pumps?

[Oakley Windows]

Yes, it comes with the transformer.

I have one, its good bit of kit, doubled my output.

You can also alter the output, by adjusting pressure, nifty 

[Frank pole]

Matt - Fitted aquatec 8800 yesterday, Its now giving me 60 litres an hour 15 tds instead of 20 litres an hour 39 tds - how much more production do you think I will get if I turn the pump up? and what size allen key is it - I dont think its a metric key as I have tried 2 sets!

[Oakley Windows]

Who knows, you need a pressure guage, dont want to blow any seals.