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My pressure gauge arrived today so tested mains water going into filters. 28psi!!!! No wonder my pure production is sloooooow.

I am only using a small 150gpd setup as a starting point to sort of test things out.

Been looking for a booster pump but it seems everyone is out of stock of 150gpd booster pumps! I can get 200gpd ones no problem and only slightly more expensive.

So looking around there seem to be 2 basic types, just boosters and self regulating booster pumps. I realise that over pressurising ro membranes can damage them but if the pump is self regulating to 70psi then that should be OK shouldn't it?

A 150gpd seems to be 70psi and 1.1L/min and a self regulating 200gpd is 70psi and 1.6L/min. So if it tries to push 1.6L/min through the 150gpd membrane and the pressure rises a self regulating pump should bypass the over pressure back to the input thus maintaining the 70psi shouldn't it?

Do you think a 200gpd self regulating pump would be OK on a 150gpd membrane or do you have an alternative solution?

Cheers

<blockquote data-quote="ched999uk" data-source="post: 462994" data-attributes="member: 9401">My pressure gauge arrived today so tested mains water going into filters. 28psi!!!! No wonder my pure production is sloooooow.I am only using a small 150gpd setup as a starting point to sort of test things out. Been looking for a booster pump but it seems everyone is out of stock of 150gpd booster pumps! I can get 200gpd ones no problem and only slightly more expensive.So looking around there seem to be 2 basic types, just boosters and self regulating booster pumps. I realise that over pressurising ro membranes can damage them but if the pump is self regulating to 70psi then that should be OK shouldn&#039;t it?A 150gpd seems to be 70psi and 1.1L/min and a self regulating 200gpd is 70psi and 1.6L/min. So if it tries to push 1.6L/min through the 150gpd membrane and the pressure rises a self regulating pump should bypass the over pressure back to the input thus maintaining the 70psi shouldn&#039;t it?Do you think a 200gpd self regulating pump would be OK on a 150gpd membrane or do you have an alternative solution?Cheers</blockquote>

[QUOTE="ched999uk, post: 462994, member: 9401"] My pressure gauge arrived today so tested mains water going into filters. 28psi!!!! No wonder my pure production is sloooooow. I am only using a small 150gpd setup as a starting point to sort of test things out. Been looking for a booster pump but it seems everyone is out of stock of 150gpd booster pumps! I can get 200gpd ones no problem and only slightly more expensive. So looking around there seem to be 2 basic types, just boosters and self regulating booster pumps. I realise that over pressurising ro membranes can damage them but if the pump is self regulating to 70psi then that should be OK shouldn't it? A 150gpd seems to be 70psi and 1.1L/min and a self regulating 200gpd is 70psi and 1.6L/min. So if it tries to push 1.6L/min through the 150gpd membrane and the pressure rises a self regulating pump should bypass the over pressure back to the input thus maintaining the 70psi shouldn't it? Do you think a 200gpd self regulating pump would be OK on a 150gpd membrane or do you have an alternative solution? Cheers [/QUOTE]

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