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Old 12-08-2007, 04:27 PM   #1
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We recently replaced the two filters in our '07 34' SE, motivated in part by the fact we'd noticed a significant drop in water "flow" at the taps. We're currently at a park that warns against high "pressure", said to be around 100#. So we used a Marshall Brass regulator which appears to be marked for "40-50 PSI". Replacing the filters helped some, but in the process we decided to test the flow without any filters installed -- and found the flow at the taps was MUCH better. With the new filters installed, and the new filters installed, it was somewhat better than before, but far below the "no filter" situation. A non-tech person wonders whether the filters are themselves acting as a "regulator"; or if not, at what PSI regulated setting would the inside plumbing still be adequately protected. I sense there's an answer related to "flow", plus the difference between "dynamic" and "static" pressure. But some of us are lacking in those concepts (-;
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Old 12-08-2007, 04:27 PM   #2
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We recently replaced the two filters in our '07 34' SE, motivated in part by the fact we'd noticed a significant drop in water "flow" at the taps. We're currently at a park that warns against high "pressure", said to be around 100#. So we used a Marshall Brass regulator which appears to be marked for "40-50 PSI". Replacing the filters helped some, but in the process we decided to test the flow without any filters installed -- and found the flow at the taps was MUCH better. With the new filters installed, and the new filters installed, it was somewhat better than before, but far below the "no filter" situation. A non-tech person wonders whether the filters are themselves acting as a "regulator"; or if not, at what PSI regulated setting would the inside plumbing still be adequately protected. I sense there's an answer related to "flow", plus the difference between "dynamic" and "static" pressure. But some of us are lacking in those concepts (-;
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Old 12-08-2007, 05:31 PM   #3
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Tom,

The filters do cause a restriction in flow, but they only lower the pressure behind them while there is flow. The amount of reduction will depend on the flow. As soon as the flow stops the pressure will equalize on both sides of the filters. The type of regulator you are using is quite restrictive, if you do a search on "water regulators" you will find a lot of information.

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Old 12-09-2007, 07:01 PM   #4
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Tom and Stephanie:

A simple fix would be to move the regulator downstream of your filters, thereby speeding flow through the filters but not building more pressure than the regulator allows, at the faucets.

There are huge threads about this subject on this forum, generally stating that a household regulator will perform much better than the usual RV ones. Also check the filter threads. They discuss flow restriction through the filters and the desirablility of higher pressure at the filter.
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Old 12-10-2007, 05:07 AM   #5
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Gary made a separate and stand alone filter-regulator system for his, which is safe and works extremely well when on "Shore-water". I will copy his idea.
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Old 12-10-2007, 12:49 PM   #6
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The TYPE of filter can make a big difference also. Some allow a greater flow.
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